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	684			684
Other comprehensive loss	(199)			(4)	(195)
Common stock repurchases	(93)		200			(293)
Dividends and dividend equivalents	(139)			(139)
Stock-based compensation	69		69
Restricted stock unit vesting	0		(60)			60
Stock option exercises	47	$ 0	18			29
Stock option exercises (in shares)		19
Balances at Jun. 30, 2018	10,211	$ 33	2,672	14,211	(176)	(6,529)
Balances (in shares) at Jun. 30, 2018		198,591
Balances at Mar. 31, 2018	10,081	$ 33	2,626	14,086	(154)	(6,510)
Balances (in shares) at Mar. 31, 2018		198,585
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	193			193
Other comprehensive income (loss)	(22)				(22)
Common stock repurchases	(42)		0			(42)
Dividends and dividend equivalents	(68)			(68)
Stock-based compensation	34		34
Restricted stock unit vesting	22		(1)			23
Stock option exercises	13	$ 0	13
Stock option exercises (in shares)		6
Balances at Jun. 30, 2018	10,211	$ 33	2,672	14,211	(176)	(6,529)
Balances (in shares) at Jun. 30, 2018		198,591
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	1,506			1,506
Other comprehensive income (loss)	271				271
Common stock repurchases	(10)		150			(160)
Dividends and dividend equivalents	(149)			(149)
Stock-based compensation	76		76
Restricted stock unit vesting	0		(3)			3
Restricted stock unit vesting (in shares)		32
Stock option exercises	17	$ 0	5			12
Stock option exercises (in shares)		1
Balances at Jun. 30, 2019	11,872	$ 33	2,763	16,429	112	(7,465)
Balances (in shares) at Jun. 30, 2019		198,628
Balances at Mar. 31, 2019	10,841	$ 33	2,722	15,563	(10)	(7,467)
Balances (in shares) at Mar. 31, 2019		198,595
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	940			940
Other comprehensive income (loss)	122				122
Common stock repurchases	0		0			0
Dividends and dividend equivalents	(74)			(74)
Stock-based compensation	43		43
Restricted stock unit vesting	(1)		(3)			2
Restricted stock unit vesting (in shares)		32
Stock option exercises	1	$ 0	1
Stock option exercises (in shares)		1
Balances at Jun. 30, 2019	$ 11,872	$ 33	$ 2,763	$ 16,429	$ 112	$ (7,465)
Balances (in shares) at Jun. 30, 2019		198,628