Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Millions	Total	Impact of adoption of ASC 326	Common Stock	Capital In Excess of Par Value	Retained Earnings	Retained Earnings Impact of adoption of ASC 326	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
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		$ 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 Dec. 31, 2018	10,161		$ 33	2,535	15,072		(159)	(7,320)
Balances (in shares) at Dec. 31, 2018			198,595
Balances at Dec. 31, 2019	$ 12,037	$ (2)	$ 33	2,820	17,483	$ (2)	156	(8,455)
Balances (in shares) at Dec. 31, 2019			198,630
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
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)		$ 0	(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
Balances at Dec. 31, 2019	12,037	$ (2)	$ 33	2,820	17,483	$ (2)	156	(8,455)
Balances (in shares) at Dec. 31, 2019			198,630
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,301				2,301
Other comprehensive income (loss)	161						161
Common stock repurchases	(25)			0				(25)
Dividends and dividend equivalents	(166)				(166)
Stock-based compensation	82			82
Restricted stock unit vesting	0		$ 0	(15)				15
Restricted stock unit vesting (in shares)			0
Stock option exercises	28		$ 0	11				17
Stock option exercises (in shares)			0
Balances at Jun. 30, 2020	14,416		$ 33	2,898	19,616		317	(8,448)
Balances (in shares) at Jun. 30, 2020			198,630
Balances at Mar. 31, 2020	12,355		$ 33	2,857	17,871		48	(8,454)
Balances (in shares) at Mar. 31, 2020			198,630
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,828				1,828
Other comprehensive income (loss)	269						269
Common stock repurchases	(8)			0				(8)
Dividends and dividend equivalents	(83)				(83)
Stock-based compensation	46			46
Restricted stock unit vesting	0		$ 0	(9)				9
Restricted stock unit vesting (in shares)			0
Stock option exercises	9		$ 0	4				5
Stock option exercises (in shares)			0
Balances at Jun. 30, 2020	$ 14,416		$ 33	$ 2,898	$ 19,616		$ 317	$ (8,448)
Balances (in shares) at Jun. 30, 2020			198,630