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	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net earnings (loss)	$ 275	$ 414	[1]
Pension and postretirement benefit expense	(10)	5	[1]
Pension and postretirement contributions	(33)	(105)	[1]
Deferred income taxes, net	(6)	(110)	[1]
Other liabilities	121	(11)	[1]
As Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net earnings (loss)		393
Pension and postretirement benefit expense		0
Pension and postretirement contributions		0
Deferred income taxes, net		(116)
Other liabilities		(84)
Effect of Change [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net earnings (loss)		21
Pension and postretirement benefit expense		5
Pension and postretirement contributions		(105)
Deferred income taxes, net		6
Other liabilities		$ 73

[1] As Adjusted (Note 1)