Intangible Assets - Changes in Carrying Amount of Goodwill and Other Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Non-Amortizable Assets:
Goodwill, Beginning Balance	$ 986	$ 986
Goodwill, Additions	0
Goodwill, Ending Balance	986	986
Trademarks and tradenames, Beginning Balance	314	314
Trademarks and tradenames, Additions
Trademarks and tradenames, Ending Balance	314	314
Other Intangible Assets:
Other intangible assets, net, Beginning Balance	717	810
Other intangible assets, net, Additions	(39)	(71)
Other intangible assets, net, Foreign Exchange		1
Other intangible assets, net, Ending Balance	678	740
Customer Relationships [Member]
Other Intangible Assets:
Total Other Intangible Assets, Beginning Balance	1,129	1,129
Total Other Intangible Assets, Additions
Total Other Intangible Assets, Ending Balance	1,129	1,129
Accumulated amortization, Beginning Balance	(530)	(448)
Accumulated amortization, Additions	(61)	(61)
Accumulated amortization, Ending Balance	(591)	(509)
Other intangible assets, net, Beginning Balance	599	681
Other intangible assets, net, Additions	(61)	(61)
Other intangible assets, net, Ending Balance	538	620
Customer Loyalty Payments [Member]
Other Intangible Assets:
Total Other Intangible Assets, Beginning Balance	274	269
Total Other Intangible Assets, Additions	67	38
Total Other Intangible Assets, Retirements	(56)	(28)
Total Other Intangible Assets, Foreign Exchange		1
Total Other Intangible Assets, Ending Balance	285	280
Accumulated amortization, Beginning Balance	(156)	(140)
Accumulated amortization, Additions	(45)	(48)
Accumulated amortization, Retirements	56	28
Accumulated amortization, Ending Balance	(145)	(160)
Other intangible assets, net, Beginning Balance	118	129
Other intangible assets, net, Additions	22	(10)
Other intangible assets, net, Foreign Exchange		1
Other intangible assets, net, Ending Balance	$ 140	$ 120