|
Segment Information - Revenues and Segment Earnings (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
| Segment Reporting Information [Line Items] | ||
| Total revenues | $ 1,415 | $ 1,458 |
| Operating Segments [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Total revenues | 718 | 763 |
| Operating Segments [Member] | United States [Member] | Hotels [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Total revenues | $ 267 | $ 263 |
| Maximum [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Total revenues, percentage | 10.00% | 10.00% |