Financial Instruments (Narrative) (Details) € in Millions, $ in Millions |
3 Months Ended | 9 Months Ended | |||||
|---|---|---|---|---|---|---|---|
|
Sep. 30, 2016
USD ($)
contract
|
Sep. 30, 2015
USD ($)
|
Sep. 30, 2016
USD ($)
contract
|
Sep. 30, 2015
USD ($)
|
Sep. 30, 2016
EUR (€)
contract
|
Dec. 31, 2015
EUR (€)
|
Jul. 01, 2015
EUR (€)
|
|
| Senior Notes 6.125% Due May 2023 [Member] | Senior Notes [Member] | |||||||
| Derivative [Line Items] | |||||||
| Long-term debt, gross | € | € 322 | € 360 | € 360 | ||||
| Designated as Hedging Instrument [Member] | |||||||
| Derivative [Line Items] | |||||||
| Recognized gains (losses) on derivative net investment hedge, less than | $ (6) | $ 1 | $ (9) | $ 1 | |||
| Foreign currency forward contracts [Member] | |||||||
| Derivative [Line Items] | |||||||
| Number of forward exchange currency contracts | contract | 61 | 61 | 61 | ||||
| Derivative notional value | $ 444 | $ 444 | |||||
| Foreign currency forward contracts [Member] | Not Designated as Hedging Instrument [Member] | Other Income [Member] | |||||||
| Derivative [Line Items] | |||||||
| Derivative gain | $ (2) | $ 66 | $ (2) | $ 78 | |||