Goodwill And Other Intangible Assets, Net Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets, pre-tax amortization expense	$ 24	$ 24
Future Amortization Expense, Year One	98
Future Amortization Expense, Year Two	98
Future Amortization Expense, Year Three	98
Future Amortization Expense, Year Four	98
Future Amortization Expense, Year Five	98
Goodwill, Impairment Loss	$ 0