| **(Fair Value Measurements Using Significant Unobservable Inputs (Level 3) (Details) (USD $)In Millions, unless otherwise specified**                                                                                                                                                                                                                                                                                                                                                            | 9 Months Ended | 12 Months Ended |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------|-----------------|
||
| **Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]**                                                                                                                                                                                                                                                                                                                                                                                |           |            |   |  |   |  |
| Beginning Balance                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |           |            | $ 43 |  | $ 112 |  |
| Change in fair value                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |           |            | (37) | [1] | (64) | [1] |
| Payments                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | 1              | 28              | (4) | [2] | (5) | [2] |
| Ending Balance                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |           |            | $ 2 |  | $ 43 |  |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| [1]The change in fair value is reported as acquisition-related contingent consideration in our Condensed Consolidated Statements of Operations.[2]During the nine months ended December 31, 2013, we made payments totaling $4 million to settle certain performance milestones achieved in connection with one of our acquisitions. During fiscal year 2013, we made payments totaling $5 million to settle certain performance milestones achieved in connection with two of our acquisitions. |

| X                                                                                                                                                                                                                                                                                |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Payments of acquisition contingent consideration.
+ References
No definition available.
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| X                                                                                                                                                                                                                                |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258
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