Description of the Company and Basis of Presentation (Schedule of Changes in Accounting Policy Regarding Pension and Other Postretirement Benefits - Consolidated Statements of Cash Flows) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net earnings (loss)	$ 142	$ 193	[1]
Pension and postretirement benefit expense	(5)	3	[1]
Pension and postretirement contributions	(19)	(66)	[1]
Deferred income taxes, net	(8)	(91)	[1]
Other liabilities	83	(32)	[1]
As Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net earnings (loss)		183
Pension and postretirement benefit expense		0
Pension and postretirement contributions		0
Deferred income taxes, net		(94)
Other liabilities		(82)
Effect of Change [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net earnings (loss)		10
Pension and postretirement benefit expense		3
Pension and postretirement contributions		(66)
Deferred income taxes, net		3
Other liabilities		$ 50

[1] As Adjusted (Note 1)