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, 2018			$ 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	[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 acquired									125
Treasury stock acquired						(1,202)
Other				3	1	1	(9)
Ending balance at Dec. 31, 2019			1,466	2,488	(2)	(22,063)	22,501	(4,273)	441
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		2,860					2,695		165
Other comprehensive income (loss), net of tax		(66)						(72)	6
Dividends	[1]						(1,502)		(152)
Stock-based compensation expense				107
Shares issued for stock options				400		462
Shares issued for restricted stock awards				(31)		31
Noncontrolling interests acquired									(99)
Treasury stock acquired						(1,476)
Other				5	1	1	5		(3)
Ending balance at Dec. 31, 2020		1,101	1,466	2,969	(1)	(23,045)	23,699	(4,345)	358
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		2,338					2,166		172
Other comprehensive income (loss), net of tax		(43)						(41)	(2)
Dividends	[1]						(1,515)		(166)
Stock-based compensation expense				135
Shares issued for stock options				188		248
Shares issued for restricted stock awards				(27)		27
Treasury stock acquired						(1,320)
Other				4	0	1	0		0
Ending balance at Dec. 31, 2021		$ 971	$ 1,466	$ 3,269	$ (1)	$ (24,089)	$ 24,350	$ (4,386)	$ 362

[1] * Two dividends were declared in each of the first quarters of 2021, 2020 and 2019.