Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Federal Statutory Income Tax Rate, Percent	35.00%	35.00%	35.00%	35.00%
Earnings before income taxes	$ 235	$ 245	$ 449	$ 435
Income tax expense computed at United States statutory tax rate	82	85	157	152
U.S. government tax incentives, including Energy Tax Credits	0	(17)	0	(111)
U.S. foreign income items, net of credits	(13)	0	(25)	(22)
Foreign government tax incentive, including BEFIEX	(5)	(18)	(11)	(28)
Other	(14)	(11)	(21)	(19)
Income tax expense (benefit) computed at effective worldwide tax rates	$ 50	$ 39	$ 100	$ (28)