Provision (Benefit) for Income Taxes (Details) (USD $) In Millions	1 Months Ended	3 Months Ended			6 Months Ended
	Jul. 31, 2011	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Current :
Federal		$ 30		$ 70	$ 47	$ (43)
State		2		5	3	(9)
Foreign		16		8	(2)	13
Total		48		83	48	(39)
Deferred:
Federal		86		15	78	38
State		7		3	8	6
Foreign		4		3	5	5
Total		97		21	91	49
Total provision (benefit)		145		104	139	10
Provision Benefit for Income Taxes (Textuals) [Abstract]
Tax benefit from settlements and revised assessment			124
Decrease in unrecognized tax benefits		62
Cash payments for settlements to the IRS	82
Minimum
Income Tax Contingency [Line Items]
Anticipated cash payments (net of refunds) to taxing authorities		85			85
Maximum
Income Tax Contingency [Line Items]
Anticipated cash payments (net of refunds) to taxing authorities		$ 90			$ 90