Revenues and Long-Lived Assets by Geographical Area (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Revenues	$ 5,166	$ 5,059	$ 4,714
Property and equipment, net	10,995	11,588	11,383
Operating Segments | United States
Segment Reporting Information [Line Items]
Revenues	4,895	4,791	4,461
Property and equipment, net	10,498	11,095	10,874
Operating Segments | Australia
Segment Reporting Information [Line Items]
Revenues	40	42	27
Property and equipment, net	106	133	136
Operating Segments | Brazil
Segment Reporting Information [Line Items]
Revenues	30	33	33
Property and equipment, net	76	39	42
Operating Segments | Canada
Segment Reporting Information [Line Items]
Revenues	97	95	92
Property and equipment, net	89	97	126
Operating Segments | Chile
Segment Reporting Information [Line Items]
Revenues	34	37	28
Property and equipment, net	54	63	58
Operating Segments | Mexico
Segment Reporting Information [Line Items]
Revenues	24	25	24
Property and equipment, net	32	26	23
Operating Segments | New Zealand
Segment Reporting Information [Line Items]
Revenues	46	36	32
Property and equipment, net	140	135	124
Operating Segments | United Kingdom
Segment Reporting Information [Line Items]
Revenues			17
Property and equipment, net