Intangible Assets - Changes in Carrying Amount of Goodwill and Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
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	671	717
Other Intangible Assets, net, Additions	6	(22)
Other Intangible Assets, net, Foreign Exchange		(1)
Other Intangible Assets, net, Ending Balance	677	694
Acquired Intangible Assets [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	(610)	(530)
Accumulated amortization, Additions	(19)	(20)
Accumulated amortization, Ending Balance	(629)	(550)
Other Intangible Assets, net, Beginning Balance	519	599
Other Intangible Assets, net, Additions	(19)	(20)
Other Intangible Assets, net, Ending Balance	500	579
Customer Loyalty Payments [Member]
Other Intangible Assets:
Total Other Intangible Assets, Beginning Balance	306	274
Total Other Intangible Assets, Additions	43	12
Total Other Intangible Assets, Retirements	(28)	(47)
Total Other Intangible Assets, Foreign Exchange		(1)
Total Other Intangible Assets, Ending Balance	321	238
Accumulated amortization, Beginning Balance	(154)	(156)
Accumulated amortization, Additions	(18)	(14)
Accumulated amortization, Retirements	28	47
Accumulated amortization, Foreign Exchange
Accumulated amortization, Ending Balance	(144)	(123)
Other Intangible Assets, net, Beginning Balance	152	118
Other Intangible Assets, net, Additions	25	(2)
Other Intangible Assets, net, Foreign Exchange		(1)
Other Intangible Assets, net, Ending Balance	$ 177	$ 115