Goodwill and Other Intangible Assets, Net (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Intangible assets, pre-tax amortization expense	$ 22	$ 24
Estimated Amortization Expense, Year One, assuming no additional transactions occur that require the amortization of intangible assets	88
Estimated Amortization Expense, Year Two, assuming no additional transactions occur that require the amortization of intangible assets	88
Estimated Amortization Expense, Year Three, assuming no additional transactions occur that require the amortization of intangible assets	88
Estimated Amortization Expense, Year Four, assuming no additional transactions occur that require the amortization of intangible assets	88
Estimated Amortization Expense, Year Five, assuming no additional transactions occur that require the amortization of intangible assets	88
Goodwill, Impairment Loss	$ 0