Changes in Consolidated Shareholders' Equity - USD ($) $ in Millions		Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury stock	Treasury stock Cumulative Effect, Period of Adoption, Adjustment [Member]	Treasury stock Cumulative Effect, Period of Adoption, Adjusted Balance	Profit employed in the business	Profit employed in the business Cumulative Effect, Period of Adoption, Adjustment [Member]	Profit employed in the business Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated other comprehensive income (loss)	Accumulated other comprehensive income (loss) Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated other comprehensive income (loss) Cumulative Effect, Period of Adoption, Adjusted Balance	Noncontrolling interests	Noncontrolling interests Cumulative Effect, Period of Adoption, Adjustment [Member]	Noncontrolling interests Cumulative Effect, Period of Adoption, Adjusted Balance
Dividends per share declared		$ 3.95
Balance at Dec. 31, 2018		$ 14,080		$ 14,315	$ 5,827		$ 5,827	$ (20,531)		$ (20,531)	$ 30,427		$ 30,554	$ (1,684)		$ (1,576)	$ 41		$ 41
Balance (Lease accounting) at Dec. 31, 2018			$ 235			$ 0			$ 0			$ 235			$ 0			$ 0
Balance (Reclassification of certain tax effects from accumulated other comprehensive income) at Dec. 31, 2018			0			0			0			(108)			108			0
Increase (Decrease) in Stockholders' Equity
Profit (loss) of consolidated and affiliated companies		6,094			0			0			6,093			0			1
Foreign currency translation		16			0			0			0			16			0
Pension and other post retirement benefits		(34)			0			0			0			(34)			0
Derivative financial instruments, net of tax		(8)			0			0			0			(8)			0
Available-for-sale securities		35			0			0			0			35			0
Dividends declared		(2,210)			0			0			(2,210)			0			0
Distribution to noncontrolling interests		(3)			0			0			0			0			(3)
Common shares issued from treasury stock for stock-based compensation		238			(4)			242			0			0			0
Stock-based compensation expense		205			205			0			0			0			0
Common shares repurchased		(3,928)			0			(3,928)			0			0			0
Other		(91)			93			0			0			0			(2)
Balance at Dec. 31, 2019		$ 14,629		14,604	5,935		5,935	(24,217)		(24,217)	34,437		34,412	(1,567)		(1,567)	41		41
Balance (Credit losses) at Dec. 31, 2019			$ (25)			$ 0			$ 0			$ (25)			$ 0			$ 0
Increase (Decrease) in Stockholders' Equity
Common shares issued from treasury stock for stock-based compensation (in shares)		5,126,379
Common shares repurchased (in shares)		30,586,507
Dividends per share declared		$ 4.12
Profit (loss) of consolidated and affiliated companies		$ 3,003			0			0			2,998			0			5
Foreign currency translation		577			0			0			0			577			0
Pension and other post retirement benefits		(29)			0			0			0			(29)			0
Derivative financial instruments, net of tax		97			0			0			0			97			0
Available-for-sale securities		34			0			0			0			34			0
Dividends declared		(2,247)			0			0			(2,247)			0			0
Common shares issued from treasury stock for stock-based compensation		229			(61)			290			0			0			0
Stock-based compensation expense		202			202			0			0			0			0
Common shares repurchased		(1,250)			0			(1,250)			0			0			0
Other		158			(154)			1			(4)			0			(1)
Balance at Dec. 31, 2020		$ 15,378		$ 15,378	6,230		$ 6,230	(25,178)		$ (25,178)	35,167		$ 35,167	(888)		$ (888)	47		$ 47
Increase (Decrease) in Stockholders' Equity
Common shares issued from treasury stock for stock-based compensation (in shares)		5,317,243
Common shares repurchased (in shares)		10,096,006
Dividends per share declared		$ 4.36
Profit (loss) of consolidated and affiliated companies		$ 6,493			0			0			6,489			0			4
Foreign currency translation		(598)			0			0			0			(598)			0
Pension and other post retirement benefits		(30)			0			0			0			(30)			0
Derivative financial instruments, net of tax		(3)			0			0			0			(3)			0
Available-for-sale securities		(34)			0			0			0			(34)			0
Dividends declared	[1]	(2,374)			0			0			(2,374)			0			0
Distribution to noncontrolling interests		(4)			0			0			0			0			(4)
Common shares issued from treasury stock for stock-based compensation		135			(68)			203			0			0			0
Stock-based compensation expense		200			200			0			0			0			0
Common shares repurchased	[2]	(2,668)			0			(2,668)			0			0			0
Other		(35)			36			0			0			0			(1)
Balance at Dec. 31, 2021		$ 16,516			6,398			(27,643)			39,282			(1,553)			32
Increase (Decrease) in Stockholders' Equity
Common shares issued from treasury stock for stock-based compensation (in shares)		3,571,503
Common shares repurchased (in shares)		12,987,299
Noncontrolling Interest, Period Increase (Decrease)		$ (14)			$ 0			$ 0			$ 0			$ 0			$ (14)

[1] Dividends per share of common stock of $4.36, $4.12 and $3.95 were declared in the years ended December 31, 2021, 2020 and 2019, respectively.

[2] See Note 16 regarding shares repurchased.