Segment Information - Company's Sales Attributable to U.S. Customers and International Customers (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Net sales	$ 12,622	$ 13,107	$ 13,154
Operating Segments [Member] | U.S. [Member]
Segment Reporting Information [Line Items]
Net sales	9,808	10,658	11,067
Operating Segments [Member] | United Kingdom [Member]
Segment Reporting Information [Line Items]
Net sales	449	360	310
Operating Segments [Member] | Canada [Member]
Segment Reporting Information [Line Items]
Net sales	357	314	328
Operating Segments [Member] | Germany [Member]
Segment Reporting Information [Line Items]
Net sales	272	263	243
Operating Segments [Member] | Australia [Member]
Segment Reporting Information [Line Items]
Net sales	218	222	118
Operating Segments [Member] | South Korea [Member]
Segment Reporting Information [Line Items]
Net sales	178	125	93
Operating Segments [Member] | Saudi Arabia (Member)
Segment Reporting Information [Line Items]
Net sales	132	76	41
Operating Segments [Member] | Italy [Member]
Segment Reporting Information [Line Items]
Net sales	107	116	98
Operating Segments [Member] | Other [Member]
Segment Reporting Information [Line Items]
Net sales	1,101	973	856
Operating Segments [Member] | Total International [Member]
Segment Reporting Information [Line Items]
Net sales	$ 2,814	$ 2,449	$ 2,087