Consolidated Statement of Changes in Shareholders' Equity - USD ($) $ in Millions		Total	Adjustments to adopt new accounting guidance	Adjusted beginning balance	Common stock	Common stock Adjustments to adopt new accounting guidance	Common stock Adjusted beginning balance	Treasury stock	Treasury stock Adjustments to adopt new accounting guidance	Treasury stock Adjusted beginning balance	Profit employed in the business	Profit employed in the business Adjustments to adopt new accounting guidance	Profit employed in the business Adjusted beginning balance	Accumulated other comprehensive income (loss)	Accumulated other comprehensive income (loss) Adjustments to adopt new accounting guidance	Accumulated other comprehensive income (loss) Adjusted beginning balance	Noncontrolling interests	Noncontrolling interests Adjustments to adopt new accounting guidance	Noncontrolling interests Adjusted beginning balance
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	[1]		$ 235			$ 0			$ 0			$ 235			$ 0			$ 0
Balance (Reclassification of certain tax effects from accumulated other comprehensive income) at Dec. 31, 2018	[1]		0			0			0			(108)			108			0
Increase (Decrease) in Shareholders' Equity
Profit of consolidated and affiliated companies		4,997			0			0			4,995			0			2
Foreign currency translation, net of tax		(186)			0			0			0			(186)			0
Pension and other postretirement benefits, net of tax		(22)			0			0			0			(22)			0
Derivative financial instruments, net of tax		(33)			0			0			0			(33)			0
Available-for-sale securities, net of tax		34			0			0			0			34			0
Dividends, Common Stock, Cash	[2]	(1,074)			0			0			(1,074)			0			0
Distribution to noncontrolling interests		(2)			0			0			0			0			(2)
Common shares issued from treasury stock for stock-based compensation: three months:404,606 in 2019 and 1,751,708 for 2020; nine months: 2,907,710 in 2019 and 3,271,679 in 2020		59			(62)			121			0			0			0
Stock-based compensation expense, before tax (in dollars)		170			170			0			0			0			0
Common shares repurchased: three months: 10,335,410 in 2019 and 0 in 2020; nine months: 25,792,061 in 2019 and 10,096,006 in 2020	[1]	(3,283)			0			(3,283)			0			0			0
Other		18			(16)			0			(2)			0			0
Balance at Sep. 30, 2019		$ 14,993			5,951			(23,693)			34,477			(1,783)			41
Increase (Decrease) in Shareholders' Equity
Common Stock, Dividends, Per Share, Declared		$ 1.89
Common shares issued from treasury stock for stock-based compensation (in shares)		2,907,710
Common shares repurchased (in shares)		25,792,061
Balance at Jun. 30, 2019		$ 14,878			5,822			(22,467)			32,981			(1,499)			41
Increase (Decrease) in Shareholders' Equity
Profit of consolidated and affiliated companies		1,494			0			0			1,494			0			0
Foreign currency translation, net of tax		(263)			0			0			0			(263)			0
Pension and other postretirement benefits, net of tax		(8)			0			0			0			(8)			0
Derivative financial instruments, net of tax		(17)			0			0			0			(17)			0
Available-for-sale securities, net of tax		4			0			0			0			4			0
Common shares issued from treasury stock for stock-based compensation: three months:404,606 in 2019 and 1,751,708 for 2020; nine months: 2,907,710 in 2019 and 3,271,679 in 2020		20			0			20			0			0			0
Stock-based compensation expense, before tax (in dollars)		57			57			0			0			0			0
Common shares repurchased: three months: 10,335,410 in 2019 and 0 in 2020; nine months: 25,792,061 in 2019 and 10,096,006 in 2020	[3]	(1,246)			0			(1,246)			0			0			0
Other		74			72			0			2			0			0
Balance at Sep. 30, 2019		$ 14,993			5,951			(23,693)			34,477			(1,783)			41
Increase (Decrease) in Shareholders' Equity
Common shares issued from treasury stock for stock-based compensation (in shares)		404,606
Common shares repurchased (in shares)		10,335,410
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	[4]		$ (25)			$ 0			$ 0			$ (25)			$ 0			$ 0
Increase (Decrease) in Shareholders' Equity
Profit of consolidated and affiliated companies		2,223			0			0			2,218			0			5
Foreign currency translation, net of tax		106			0			0			0			106			0
Pension and other postretirement benefits, net of tax		(20)			0			0			0			(20)			0
Derivative financial instruments, net of tax		4			0			0			0			4			0
Available-for-sale securities, net of tax		29			0			0			0			29			0
Dividends, Common Stock, Cash	[2]	(1,121)			0			0			(1,121)			0			0
Common shares issued from treasury stock for stock-based compensation: three months:404,606 in 2019 and 1,751,708 for 2020; nine months: 2,907,710 in 2019 and 3,271,679 in 2020		110			(43)			153			0			0			0
Stock-based compensation expense, before tax (in dollars)		169			169			0			0			0			0
Common shares repurchased: three months: 10,335,410 in 2019 and 0 in 2020; nine months: 25,792,061 in 2019 and 10,096,006 in 2020	[1]	(1,250)			0			(1,250)			0			0			0
Other		140			143			(1)			(1)			0			(1)
Balance at Sep. 30, 2020		$ 14,994			6,204			(25,315)			35,508			(1,448)			45
Increase (Decrease) in Shareholders' Equity
Common Stock, Dividends, Per Share, Declared		$ 2.06
Common shares issued from treasury stock for stock-based compensation (in shares)		3,271,679
Common shares repurchased (in shares)		10,096,006
Balance at Jun. 30, 2020		$ 13,777			6,120			(25,412)			34,841			(1,815)			43
Increase (Decrease) in Shareholders' Equity
Profit of consolidated and affiliated companies		671			0			0			668			0			3
Foreign currency translation, net of tax		291			0			0			0			291			0
Pension and other postretirement benefits, net of tax		(8)			0			0			0			(8)			0
Derivative financial instruments, net of tax		76			0			0			0			76			0
Available-for-sale securities, net of tax		8			0			0			0			8			0
Common shares issued from treasury stock for stock-based compensation: three months:404,606 in 2019 and 1,751,708 for 2020; nine months: 2,907,710 in 2019 and 3,271,679 in 2020		120			23			97			0			0			0
Stock-based compensation expense, before tax (in dollars)		55			55			0			0			0			0
Other		4			6			0			(1)			0			(1)
Balance at Sep. 30, 2020		$ 14,994			$ 6,204			$ (25,315)			$ 35,508			$ (1,448)			$ 45
Increase (Decrease) in Shareholders' Equity
Common shares issued from treasury stock for stock-based compensation (in shares)		1,751,708
Common shares repurchased (in shares)		0

[1] See Note 12 for additional information.

[2] Dividends per share of common stock of $2.06 and $1.89 were declared in the nine months ended September 30, 2020 and 2019, respectively.

[3] See Note 12 for additional information.

[4] See Note 2 for additional information.