Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Millions		Total	Common Stock	Additional Paid-In Capital	Unearned Compensation	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
Beginning balance at Dec. 31, 2016			$ 1,466	$ 1,691	$ (7)	$ (19,135)	$ 19,922	$ (4,180)	$ 260
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		$ 2,174					2,024		150
Other comprehensive income (loss), net of tax		342						325	17
Dividends (in dollars per share)	[1]						(1,405)		(124)
Stock-based compensation expense				127
Shares issued for stock options				197		313
Shares issued for restricted stock awards				(34)		34
Treasury stock acquired						(1,399)
Other				3	2	6	(10)
Ending balance at Dec. 31, 2017			1,466	1,984	(5)	(20,181)	20,531	(3,855)	303
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		2,558					2,400		158
Other comprehensive income (loss), net of tax		(189)						(170)	(19)
Dividends (in dollars per share)	[1]						(1,448)		(143)
Stock-based compensation expense				109
Shares issued for stock options				137		190
Shares issued for restricted stock awards				(31)		31
Treasury stock acquired						(1,238)
Other	[2]			5	2	2	132	(163)
Ending balance at Dec. 31, 2018		197	1,466	2,204	(3)	(21,196)	21,615	(4,188)	299
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		2,527					2,367		160
Other comprehensive income (loss), net of tax		(87)						(85)	(2)
Dividends (in dollars per share)	[1]						(1,472)		(141)
Stock-based compensation expense				100
Shares issued for stock options				210		305
Shares issued for restricted stock awards				(29)		29
Noncontrolling interests assumed through acquisition									125
Treasury stock acquired						(1,202)
Other				3	1	1	(9)
Ending balance at Dec. 31, 2019		$ 558	$ 1,466	$ 2,488	$ (2)	$ (22,063)	$ 22,501	$ (4,273)	$ 441

[1] * Two dividends were declared in each of the first quarters of 2019, 2018 and 2017

[2] ⁽¹⁾ As a result of the early adoption of ASU 2018-02, the Company reclassified the stranded tax effects in Accumulated other comprehensive income (loss) resulting from the TCJA to Retained earnings. See Note 2, Summary of Significant Accounting Policies for additional information.