Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Reconciliation of total taxes to nominal federal rate details [Abstract]
Total taxes	$ 261	$ 208	$ 276	$ 389
Schedule of deferred income tax assets and liabilities details [Abstract]
Net deferred income tax assets	335		335		374
Permanently Invested Foreign Earnings [Line Items]
Permanently reinvested foreign earnings	792		792
Unrecognized deferred tax liabilities related to investments in subsidiaries	135		135
Income Taxes Text Details [Abstract]
Unrecognized Tax Benefits, Period Increase (Decrease)			12
Increase (decrease) to net income resulting from change in gross unrecognized tax benefits			5
China And Indonesia [Member]
Permanently Invested Foreign Earnings [Line Items]
Increase to shareholders' net income for change in foreign tax practices			20	22
China And Indonesia [Member] | Implementation Effect [Member]
Permanently Invested Foreign Earnings [Line Items]
Increase to shareholders' net income for change in foreign tax practices				$ 13