Intangible Assets - Changes in Carrying Amount of Goodwill and Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Non-Amortizable Assets:
Goodwill, Beginning Balance	$ 986	$ 986
Goodwill, Additions
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	(45)	(94)
Other intangible assets, net, Foreign Exchange	(1)	1
Other intangible assets, net, Ending Balance	671	717
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	(80)	(82)
Accumulated amortization, Ending Balance	(610)	(530)
Other intangible assets, net, Beginning Balance	599	681
Other intangible assets, net, Additions	(80)	(82)
Other intangible assets, net, Ending Balance	519	599
Customer Loyalty Payments [Member]
Other Intangible Assets:
Total Other Intangible Assets, Beginning Balance	274	269
Total Other Intangible Assets, Additions	98	50
Total Other Intangible Assets, Retirements	(66)	(45)
Total Other Intangible Assets, Ending Balance	306	274
Accumulated amortization, Beginning Balance	(156)	(140)
Accumulated amortization, Additions	(63)	(62)
Accumulated amortization, Retirements	66	45
Accumulated amortization, Foreign Exchange	(1)	1
Accumulated amortization, Ending Balance	(154)	(156)
Other intangible assets, net, Beginning Balance	118	129
Other intangible assets, net, Additions	35	(12)
Other intangible assets, net, Foreign Exchange	(1)	1
Other intangible assets, net, Ending Balance	$ 152	$ 118