Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Comprehensive Income (Loss) [Abstract]
Net earnings	$ 472	$ 427	$ 915	$ 790
Other comprehensive income (loss), net of tax:
Total other comprehensive income (loss), net of tax	1	(13)	4	6
Total comprehensive income (loss)	473	414	919	796
Continuing Operations [Member]
Other comprehensive income (loss), net of tax:
Cumulative translation adjustments	(9)	(21)	(9)	(5)
Amortization of net actuarial loss	11	7	22	15
Change in fair value of cash flow hedges	(1)	0	(1)	0
Unrealized gain (loss) on securities	0	0	1	1
Total other comprehensive income (loss), net of tax	1	(14)	13	11
Discontinued Operations [Member]
Other comprehensive income (loss), net of tax:
Total other comprehensive income (loss), net of tax	$ 0	$ 1	$ (9)	$ (5)