Consolidated Statements of Equity (Unaudited) - USD ($) $ in Millions	Total	COMMON STOCK	ADDITIONAL PAID-IN CAPITAL	RETAINED EARNINGS	ACCUMULATED OTHER COMPREHENSIVE LOSS	TREASURY SHARES	NON-CONTROLLING INTERESTS
Balance, beginning of period at Dec. 31, 2018		$ 561	$ 817	$ 14,347	$ (4,647)	$ (3,567)	$ 73
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			(42)
Issuance of shares under stock compensation plans and employee stock purchase plans			(39)			221
Other			0
Net income attributable to the Company	$ 1,071			1,048			23
Dividend equivalents declared				(4)
Dividends declared				(650)
Other comprehensive loss, net of tax	120				120
Purchase of treasury shares						(100)
Net non-controlling interests acquired / (disposed)							195
Distributions and other changes							(19)
Balance, end of period at Jun. 30, 2019	$ 8,337	561	736	14,741	(4,527)	(3,446)	272
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 1.285
Balance, beginning of period at Mar. 31, 2019		561	681	14,642	(4,590)	(3,385)	77
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			59
Issuance of shares under stock compensation plans and employee stock purchase plans			(4)			39
Other			0
Net income attributable to the Company	$ 344			332			12
Dividend equivalents declared				(2)
Dividends declared				(231)
Other comprehensive loss, net of tax	63				63
Purchase of treasury shares						(100)
Net non-controlling interests acquired / (disposed)							195
Distributions and other changes							(12)
Balance, end of period at Jun. 30, 2019	$ 8,337	561	736	14,741	(4,527)	(3,446)	272
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 0.455
Balance, beginning of period at Dec. 31, 2019	$ 7,943	561	862	15,199	(5,055)	(3,774)	150
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			(63)
Issuance of shares under stock compensation plans and employee stock purchase plans			16			147
Other			(1)
Net income attributable to the Company	1,347			1,326			21
Dividend equivalents declared				(6)
Dividends declared				(459)
Other comprehensive loss, net of tax	(527)				(527)
Purchase of treasury shares						0
Net non-controlling interests acquired / (disposed)							(1)
Distributions and other changes							(4)
Balance, end of period at Jun. 30, 2020	$ 8,392	561	814	16,060	(5,582)	(3,627)	166
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 0.910
Balance, beginning of period at Mar. 31, 2020		561	746	15,490	(5,847)	(3,655)	156
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			66
Issuance of shares under stock compensation plans and employee stock purchase plans			2			28
Other			0
Net income attributable to the Company	$ 580			572			8
Dividend equivalents declared				(2)
Dividends declared				0
Other comprehensive loss, net of tax	265				265
Purchase of treasury shares						0
Net non-controlling interests acquired / (disposed)							2
Distributions and other changes							0
Balance, end of period at Jun. 30, 2020	$ 8,392	$ 561	$ 814	$ 16,060	$ (5,582)	$ (3,627)	$ 166
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 0