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 year at Dec. 31, 2016		$ 561	$ 842	$ 12,388	$ (5,093)	$ (2,506)	$ 80
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			26
Issuance of shares under stock compensation plans and employee stock purchase plans			(82)			255
Cumulative effect of adoption of new revenue recognition standard and other new accounting standards				0	0
Cumulative effect of adoption of new revenue recognition standard and other new accounting standards | Accounting Standards Update 2014-09				0
Net income	$ 1,482			1,463			19
Deconsolidation of subsidiary							0
Dividend equivalents declared – (per share amounts: $1.58 in 2018 and $1.43 in 2017)				(4)
Dividends declared – (per share amounts: $1.58 in 2018 and $1.43 in 2017)				(734)
Other comprehensive (loss) income, net of tax	533				533
Purchase of treasury shares						(600)
Distributions and other changes							(14)
Other			3
Balance, end of period at Sep. 30, 2017	7,131		783	13,113	(4,560)	(2,851)	85
Balance, beginning of year at Dec. 31, 2017	7,442	$ 561	784	13,140	(4,043)	(3,083)	83
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			20
Issuance of shares under stock compensation plans and employee stock purchase plans			(33)			171
Cumulative effect of adoption of new revenue recognition standard and other new accounting standards				0	(14)
Cumulative effect of adoption of new revenue recognition standard and other new accounting standards | Accounting Standards Update 2014-09				364
Net income	1,511			1,497			14
Net income | Accounting Standards Update 2014-09	1,511
Deconsolidation of subsidiary							0
Dividend equivalents declared – (per share amounts: $1.58 in 2018 and $1.43 in 2017)				(5)
Dividends declared – (per share amounts: $1.58 in 2018 and $1.43 in 2017)				(800)
Other comprehensive (loss) income, net of tax	(431)				(431)
Purchase of treasury shares						(675)
Distributions and other changes							(12)
Other			0
Balance, end of period at Sep. 30, 2018	7,538		$ 771	$ 14,196	$ (4,488)	$ (3,587)	$ 85
Balance, end of period (Accounting Standards Update 2014-09) at Sep. 30, 2018	$ 7,538