| **Restructuring (Details) (USD $)In Millions, unless otherwise specified** | 3 Months Ended | 6 Months Ended | 3 Months Ended | 18 Months Ended | 3 Months Ended | 6 Months Ended | 18 Months Ended | 12 Months Ended | 3 Months Ended | 18 Months Ended | 12 Months Ended | 6 Months Ended | 18 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended |        |
|----------------------------------------------------------------------------|----------------|----------------|----------------|-----------------|----------------|----------------|-----------------|-----------------|----------------|-----------------|-----------------|----------------|-----------------|----------------|----------------|----------------|-----------------|----------------|-----------------|----------------|--------|
||
| **Restructuring Cost and Reserve [Line Items]**                            |           |           |           |            |           |           |            |            |           |            |            |           |            |           |           |           |            |           |            |           |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Restructuring Reserve                                                      |           |           |           |            | $ 46           | $ 18           |            |            |           |            |            |           |            |           |           | $ 26           |            |           |            |           |   |   |   | $ 0 | $ 0 |   |   | $ 18 |   |   |   |   |   |   | $ 2 |   | $ 18 |   |
| Debt Instrument, Interest Rate, Stated Percentage                          |           |           |           |            |           |           |            |            |           |            |            |           |            |           |           |           |            |           |            |           |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | 6.50% |
| Restructuring charges (benefit)                                            | 20             | 2              | 20             | 24              |           |           | 19              | 32              |           |            |            |           |            |           |           |           | 13              | 7              | 6               | 4              | 7      | 33 | 4 |   |   | 12 | 16 |   | 19 | 3 | 48 | 5 | 5 | 10 |   | 8 |   |   |
| Expected restructuring and related charges                                 |           |           |           |            |           |           |            |            | 30             | 70              |            |           |            | 45             | 65             |           |            |           |            |           |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Impairment of Intangible Assets (Excluding Goodwill)                       | 38             | 0              | 38             | 0               |           |           |            |            |           |            | 28              | 51             | 10              |           |           |           |            |           |            |           |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Restructuring Charges Length Of Payment Period                             |           |           |           |            |           |           |            |            |           |            | 2 years         |           |            |           |           |           |            |           |            |           |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| **Restructuring Reserve [Roll Forward]**                                   |           |           |           |            |           |           |            |            |           |            |            |           |            |           |           |           |            |           |            |           |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Restructuring liability, balance at beginning of period                    |           |           |           |            | 39             | 5              |            |            |           |            |            |           |            |           |           | 31             |            |           |            |           |   |   |   | 0 | 0 |   |   | 0 |   |   |   |   |   |   | 8 |   | 5 |   |
| Additions                                                                  |           |           |           |            | 26             | 18             |            |            |           |            |            |           |            |           |           | 2              |            |           |            |           |   |   |   | 4 | 1 |   |   | 19 |   |   |   |   |   |   | 1 |   | 17 |   |
| Payments                                                                   |           |           |           |            | (16)           | (5)            |            |            |           |            |            |           |            |           |           | (4)            |            |           |            |           |   |   |   | (4) | (1) |   |   | (1) |   |   |   |   |   |   | (7) |   | (4) |   |
| Adjustments                                                                |           |           |           |            | (3)            |           |            |            |           |            |            |           |            |           |           | (3)            |            |           |            |           |   |   |   | 0 |   |   |   | 0 |   |   |   |   |   |   | 0 |   | 0 |   |
| Restructuring liability, balance at end of period                          |           |           |           |            | $ 46           | $ 18           |            |            |           |            |            |           |            |           |           | $ 26           |            |           |            |           |   |   |   | $ 0 | $ 0 |   |   | $ 18 |   |   |   |   |   |   | $ 2 |   | $ 18 |   |

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| - Definition
Interest rate stated in the contractual debt agreement.
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| - Definition
The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount expected to be charged against earnings in the current and future periods for the specified restructuring cost.
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| - Definition
Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Reserve increase representing the amount charged against earnings in the period for a specified incurred and estimated type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.
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