Goodwill and Other Identifiable Intangible Assets (Additional Information) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Carrying amount of acquired trademarks with indefinite lives	$ 1,300		$ 1,300		$ 1,421
Aggregate amortization expense of identifiable intangible assets	33	$ 31	66	$ 61
Estimated future amortization of identifiable intangible assets for remainder of 2015	70		70
Estimated future amortization of identifiable intangible assets in 2016	120		120
Estimated future amortization of identifiable intangible assets in 2017	115		115
Estimated future amortization of identifiable intangible assets in 2018	110		110
Estimated future amortization of identifiable intangible assets in 2019	95		95
Estimated future amortization of identifiable intangible assets in 2020	$ 90		$ 90