Intangible Assets - Changes in Carrying Amount of Goodwill and Other Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Non-Amortizable Assets:
Goodwill, Beginning Balance	$ 986	$ 986
Goodwill, Additions
Goodwill, Ending Balance	986	986
Trademarks and tradenames, Beginning Balance	314
Trademarks and tradenames, Ending Balance	314
Other Intangible Assets:
Other intangible assets, net, Beginning Balance	717	810
Other intangible assets, net, Additions	(33)	(45)
Other intangible assets, net, Foreign Exchange	(3)
Other intangible assets, net, Ending Balance	681	765
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	(40)	(41)
Accumulated amortization, Ending Balance	(570)	(489)
Other intangible assets, net, Beginning Balance	599	681
Other intangible assets, net, Additions	(40)	(41)
Other intangible assets, net, Ending Balance	559	640
Customer Loyalty Payments [Member]
Other Intangible Assets:
Total Other Intangible Assets, Beginning Balance	274	269
Total Other Intangible Assets, Additions	36	27
Total Other Intangible Assets, Retirements	(50)	(19)
Total Other Intangible Assets, Foreign Exchange	(3)
Total Other Intangible Assets, Ending Balance	257	277
Accumulated amortization, Beginning Balance	(156)	(140)
Accumulated amortization, Additions	(29)	(31)
Accumulated amortization, Retirements	50	19
Accumulated amortization, Ending Balance	(135)	(152)
Other intangible assets, net, Beginning Balance	118	129
Other intangible assets, net, Additions	7	(4)
Other intangible assets, net, Foreign Exchange	(3)
Other intangible assets, net, Ending Balance	122	125
Trademarks and tradenames [Member]
Non-Amortizable Assets:
Trademarks and tradenames, Beginning Balance	314	314
Trademarks and tradenames, Additions
Trademarks and tradenames, Ending Balance	$ 314	$ 314