Supplemental Cash Flow Information (Details) (USD $)	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Supplemental Cash Flow Information
U.S. federal, state and foreign income taxes paid for continuing operations	$ 1,600,000,000	$ 1,300,000,000
U.S. federal, state, and foreign income taxes paid (received) related to discontinued operations	0	46,000,000
Interest paid	236,000,000	83,000,000
Charges on debt extinguishment before write-off of deferred debt issuance cost	$ 154,000,000