Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Comprehensive Income (Loss) [Abstract]
Net earnings	$ 439	$ 472	$ 907	$ 915
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss), net of tax	20	1	22	4
Total comprehensive income (loss), net of tax	459	473	929	919
Continuing Operations [Member]
Other comprehensive income (loss), net of tax:
Cumulative translation adjustments	(1)	2	(8)	3
Amortization of net actuarial loss	7	11	14	22
Change in fair value of cash flow hedges	0	(1)	0	(1)
Unrealized gain (loss) on securities	0	0	0	1
Other comprehensive income (loss), net of tax	6	12	6	25
Discontinued Operations [Member]
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss), net of tax	$ 14	$ (11)	$ 16	$ (21)