Goodwill and Other Intangible Assets (Amortization Expense on Existing Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Goodwill and Other Intangible Assets Disclosure [Abstract]
Amortization expense	$ 65	$ 128
Future amortization expense to be recognized during remainder of 2014	62
Future amortization expense to be recognized during 2015	110
Future amortization expense to be recognized during 2016	93
Future amortization expense to be recognized during 2017	79
Future amortization expense to be recognized during 2018	68
Future amortization expense to be recognized during 2019	$ 57