Consolidated Statement Of Shareholders' Equity (Unaudited) - 3 months ended Mar. 31, 2017 - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income
December 31, 2016 at Dec. 31, 2016	$ 9,550	$ 37	$ 1,432	$ 8,842	$ (761)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	444			444
Other comprehensive income	86				86
Issuance of 1.1 million shares of common stock under stock option and benefit plans	(18)		(18)
Repurchase of 1.9 million shares of common stock	(230)		(7)	(223)
Share-based compensation	32		32
Cash dividends declared of $0.425 per share of common stock	(160)			(160)
March 31, 2017 at Mar. 31, 2017	$ 9,704	$ 37	$ 1,439	$ 8,903	$ (675)