Condensed Consolidated Statements Of Stockholders' Equity - USD ($) shares in Thousands, $ in Millions	Total	Common Stock	Capital In Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balances at Dec. 31, 2017	$ 9,842	$ 33	$ 2,445	$ 13,670	$ 19	$ (6,325)
Balances (in shares) at Dec. 31, 2017		198,572
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	491			491
Other comprehensive loss	(177)			(4)	(173)
Common stock repurchases	(51)		200			(251)
Dividends and dividend equivalents	(71)			(71)
Stock-based compensation	35		35
Restricted stock unit vesting	0		(66)			66
Stock option exercises	12	$ 0	12
Stock option exercises (in shares)		13
Balances at Mar. 31, 2018	10,081	$ 33	2,626	14,086	(154)	(6,510)
Balances (in shares) at Mar. 31, 2018		198,585
Balances at Dec. 31, 2018	10,161	$ 33	2,535	15,072	(159)	(7,320)
Balances (in shares) at Dec. 31, 2018		198,595
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	566			566
Other comprehensive income	149				149
Common stock repurchases	(10)		150			(160)
Dividends and dividend equivalents	(75)			(75)
Stock-based compensation	33		33
Restricted stock unit vesting	0		(13)			13
Stock option exercises	17	$ 0	17
Stock option exercises (in shares)		0
Balances at Mar. 31, 2019	$ 10,841	$ 33	$ 2,722	$ 15,563	$ (10)	$ (7,467)
Balances (in shares) at Mar. 31, 2019		198,595