Goodwill and Other Intangible Assets (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of other intangible assets	$ 198	$ 200	$ 179
Expected amortization expense of other intangible assets for 2013	230
Expected amortization expense of other intangible assets for 2014	230
Expected amortization expense of other intangible assets for 2015	226
Expected amortization expense of other intangible assets for 2016	221
Expected amortization expense of other intangible assets for 2017	$ 214