| **Quarterly Financial And Market Information (Summary Of Quarterly Financial And Market Information) (Details) (USD $)In Millions, except Per Share data, unless otherwise specified**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 | 3 Months Ended | 12 Months Ended |
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| **Quarterly Financial And Market Information [Line Items]**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |           |                 |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |   |   |
| Net revenue                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | $ 1,123        |                 | $ 808 |  | $ 695 |  | $ 949 |  | $ 1,209 |  | $ 922 |  | $ 711 |  | $ 955 |  | $ 3,575 | $ 3,797 | $ 4,143 |
| Gross profit                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | 900            |                 | 291 |  | 282 |  | 755 |  | 900 |  | 493 |  | 266 |  | 750 |  | 2,228 | 2,409 | 2,545 |
| Operating income (loss)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                | 344            |                 | (292) |  | (252) |  | 233 |  | 309 |  | (39) |  | (364) |  | 215 |  | 33 | 121 | 35 |
| Net income (loss)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | 367            | [1]             | (308) | [2] | (273) | [3] | 222 | [4] | 323 | [5] | (45) | [6] | (381) | [7] | 201 | [8] | 8 | 98 | 76 |
| Net income (loss) per share - Basic                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | $ 1.18         |                 | $ (1.00) |  | $ (0.89) |  | $ 0.73 |  | $ 1.07 |  | $ (0.15) |  | $ (1.21) |  | $ 0.63 |  | $ 0.03 | $ 0.32 | $ 0.23 |
| Net income (loss) per share - Diluted                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | $ 1.15         |                 | $ (1.00) |  | $ (0.89) |  | $ 0.71 |  | $ 1.05 |  | $ (0.15) |  | $ (1.21) |  | $ 0.63 |  | $ 0.03 | $ 0.31 | $ 0.23 |
| High price, Common stock per share                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | $ 30.25        |                 | $ 26.44 |  | $ 27.99 |  | $ 23.61 |  | $ 19.34 |  | $ 15.42 |  | $ 14.50 |  | $ 16.71 |  | $ 30.25 | $ 19.34 |   |
| Low price, Common stock per share                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | $ 21.54        |                 | $ 20.97 |  | $ 23.18 |  | $ 16.91 |  | $ 13.70 |  | $ 11.91 |  | $ 10.94 |  | $ 11.89 |  | $ 16.91 | $ 10.94 |   |
| Acquisition-related contingent consideration                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |           |                 | (1) |  | (44) |  | 7 |  | 1 |  | (45) |  |   |  | (20) |  | (35) | (64) | 11 |
| Impairment charges                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | 1              |                 |   |  |   |  |   |  | 31 |  | 6 |  |   |  |   |  |   | 39 | 12 |
| Gains on strategic investments, net                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | 2              |                 |   |  |   |  |   |  | (25) |  | (14) |  |   |  |   |  | 0 | 39 | 0 |
| Restructuring Charges                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |           |                 |   |  | $ 2 |  | $ (1) |  |   |  | $ (2) |  | $ 2 |  | $ (27) |  | $ 1 | $ (27) | $ (16) |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| [1]Net income includes restructuring charges of $1 million and $2 million of acquisition-related contingent consideration, both of which are pre-tax amounts.[2]Net loss includes pre-tax restructuring charges of $(1) million.[3]Net loss includes restructuring charges of $(2) million and $(44) million of acquisition-related contingent consideration, both of which are pre-tax amounts.[4]Net income includes restructuring charges of $1 million and $7 million of acquisition-related contingent consideration, both of which are pre-tax amounts.[5]Net income includes $31 million of impairment charges on acquisition-related intangible assets, $(25) million of gain on strategic investments, net, and $1 million of acquisition-related contingent consideration, both of which are pre-tax amounts.[6]Net loss includes $(45) million of acquisition-related contingent consideration, $(14) million gain on strategic investments, net, $6 million of impairment charges on acquisition-related intangible assets, and restructuring charges of $2 million, all of which are pre-tax amounts.[7]Net loss includes pre-tax restructuring charges of $(2) million.[8]Net income includes restructuring charges of $27 million and $(20) million of acquisition-related contingent consideration, both of which are pre-tax amounts. |

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Common stock per share high price
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| - Definition
This element represents the amount of gains and losses, including other than temporary impairments, recognized on strategic investments.
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| - Definition
Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.
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| - Definition
Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.
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| - Definition
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.
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| - Definition
Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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| - Definition
The net result for the period of deducting operating expenses from operating revenues.
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No definition available.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.
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| - Definition
Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.
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