|
Business Segments - Goodwill (Detail) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2015
|
Dec. 31, 2014
|
|---|---|---|
| Segment Reporting Information [Line Items] | ||
| Goodwill, gross | $ 948 | $ 948 |
| Accumulated impairment losses | (54) | (54) |
| Goodwill | 894 | 894 |
| North American Full-Service Segment | Total segment | ||
| Segment Reporting Information [Line Items] | ||
| Goodwill, gross | 392 | 392 |
| Accumulated impairment losses | 0 | 0 |
| Goodwill | 392 | 392 |
| North American Limited-Service Segment | Total segment | ||
| Segment Reporting Information [Line Items] | ||
| Goodwill, gross | 125 | 125 |
| Accumulated impairment losses | (54) | (54) |
| Goodwill | 71 | 71 |
| International Segment | Total segment | ||
| Segment Reporting Information [Line Items] | ||
| Goodwill, gross | 431 | 431 |
| Accumulated impairment losses | 0 | 0 |
| Goodwill | $ 431 | $ 431 |