Goodwill and Other Intangible Assets (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Amortization expense and projected amortization expense for intangible assets
Amortization of intangibles	$ 51	$ 48	$ 33
Expected amortization expense, 2014	47
Expected amortization expense, 2015	45
Expected amortization expense, 2016	45
Expected amortization expense, 2017	42
Expected amortization expense, 2018	$ 36