Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net earnings	$ 3,614	$ 2,981	$ 2,745
Postretirement benefit plans
Net other comprehensive (loss) income recognized during the period, net of tax benefit (expense) of $1.5 billion in 2014, $(1.6) billion in 2013 and $1.8 billion in 2012	(2,870)	2,868	(3,204)
Amounts reclassified from accumulated other comprehensive loss, net of tax expense of $386 million in 2014, $555 million in 2013 and $469 million in 2012	706	1,015	858
Other, net	(105)	9	110
Other comprehensive (loss) income, net of tax	(2,269)	3,892	(2,236)
Comprehensive income	$ 1,345	$ 6,873	$ 509