|
Commitments and Contingencies (Future Minimum Operating Lease Payments) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] | |||
| Operating leases, rent expense, minimum rentals | $ 131 | $ 135 | $ 175 |
| Real Estate Leases | |||
| Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] | |||
| 2015 | 100 | ||
| 2016 | 86 | ||
| 2017 | 67 | ||
| 2018 | 48 | ||
| 2019 | 29 | ||
| Thereafter | 46 | ||
| Total | 376 | ||
| Non-Rental Equipment Leases | |||
| Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] | |||
| 2015 | 31 | ||
| 2016 | 29 | ||
| 2017 | 27 | ||
| 2018 | 20 | ||
| 2019 | 15 | ||
| Thereafter | 8 | ||
| Total | $ 130 | ||