Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Ordinary Shares and Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss, Net of Tax	Non-controlling Interests
Increase (Decrease) in Shareholders' Equity
Balance at January 1, 2018	$ 5,581	$ 5,580	$ 3,856	$ (3,912)	$ 57
Beginning Balance (in shares) at Dec. 31, 2016		262.0
Increase (Decrease) in Shareholders' Equity
Net income	1,275		1,245		30
Shares issued - employee stock compensation plans (in shares)		3.3
Shares issued - employee stock compensation plans	(117)	$ (117)
Shares purchased (in shares)		(14.5)
Shares purchased	(1,913)		(1,913)
Share-based compensation expense	214	$ 214
Dividends to shareholders	(274)		(274)
Net change in fair value of financial instruments	13			13
Net foreign currency translation adjustments	434			431	3
Net postretirement benefit obligation	56			56
Purchases of shares from noncontrolling interests	(5)	$ (4)			(1)
Dividends paid to noncontrolling interests on subsidiary common stock	(17)				(17)
Ending Balance (in shares) at Sep. 30, 2017		250.8
Ending Balance at Sep. 30, 2017	5,247	$ 5,673	2,914	(3,412)	72
Increase (Decrease) in Shareholders' Equity
Adoption of new accounting guidance	492	0	493	(1)	0
Balance at January 1, 2018	$ 5,140	$ 5,777	2,795	(3,497)	65
Beginning Balance (in shares) at Dec. 31, 2017	247.6	247.6
Beginning Balance at Dec. 31, 2017	$ 4,648	$ 5,777	2,302	(3,496)	65
Increase (Decrease) in Shareholders' Equity
Net income	821		789		32
Shares issued - employee stock compensation plans (in shares)		2.4
Shares issued - employee stock compensation plans	(140)	$ (139)	(1)
Shares purchased (in shares)		(8.8)
Shares purchased	(1,256)		(1,256)
Share-based compensation expense	214	$ 214
Dividends to shareholders	(285)		(285)
Net change in fair value of financial instruments	14			14
Net foreign currency translation adjustments	(263)			(257)	(6)
Net postretirement benefit obligation	108			108
Purchases of shares from noncontrolling interests	(1)				(1)
Dividends paid to noncontrolling interests on subsidiary common stock	$ (24)				(24)
Ending Balance (in shares) at Sep. 30, 2018	241.2	241.2
Ending Balance at Sep. 30, 2018	$ 4,328	$ 5,852	$ 2,042	$ (3,632)	$ 66