Consolidated Statement Of Shareholders' Equity (Unaudited) - 3 months ended Mar. 31, 2016 - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
December 31, 2015 at Dec. 31, 2015	$ 8,511	$ 37	$ 1,321	$ 7,792	$ (639)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	402			402
Other comprehensive income	17				17
Issuance of 1.1 million shares of common stock under stock option and benefit plans, including $16 excess income tax benefit	5		5
Repurchase of 0.1 million shares of common stock	(13)		(1)	(12)
Share-based compensation	28		28
Cash dividends declared of $0.38 per share of common stock	(142)			(142)
March 31, 2016 at Mar. 31, 2016	$ 8,808	$ 37	$ 1,353	$ 8,040	$ (622)