Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		21 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012
Income Tax Disclosure [Abstract]
Effective tax rates	4.30%	3.90%
United States statutory tax rate	35.00%
Effective tax rate for non-U.S. profits			0.00%
Gross unrecognized tax benefits	$ 274		$ 274
Cash deposits to offset uncertain tax liabilities	43		43
Amount of unrecognized tax benefits that would affect the effective tax rate	96		96
The total amount of unrecognized tax benefits that, if recognized, would result in adjustments to deferred tax assets with corresponding adjustments to the valuation allowance	165		165
Combined amount of accrued interest and penalties related to uncertain tax positions	21		21
Amount of unrecognized tax benefits for which it is reasonably possible that there will be a reduction within the next 12 months	$ 81		$ 81