|
Parent Company (Details Textuals) (USD $)
|
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2014
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Parent Company Details (Textuals) [Abstract] | ||||
| Gain on business travel joint venture transaction | $ (626,000,000) | $ (630,000,000) | ||
| Non Cash [Member] | ||||
| Parent Company Details (Textuals) [Abstract] | ||||
| Charge related to impacts of debt exchange on long-term debt | 0 | 0 | 439,000,000 | |
| Gain on business travel joint venture transaction | (630,000,000) | 0 | 0 | |
| Parent Company [Member] | Non Cash [Member] | ||||
| Parent Company Details (Textuals) [Abstract] | ||||
| Charge related to impacts of debt exchange on long-term debt | $ 0 | $ 0 | ||