Condensed Consolidated Statement 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
Adoption of new accounting guidance	$ 49		$ 49
Balance at January 1, 2018	5,581	$ 5,580	3,856	$ (3,912)	$ 57
Beginning Balance (in shares) at Dec. 31, 2016		262.0
Beginning Balance at Dec. 31, 2016	5,532	$ 5,580	3,807	(3,912)	57
Increase (Decrease) in Shareholders' Equity
Net income	305		291		14
Shares issued - employee stock compensation plans (in shares)		1.9
Shares issued - employee stock compensation plans	(85)	$ (85)
Shares purchased (in shares)		(1.1)
Shares purchased	(126)		(126)
Share-based compensation expense	75	$ 75
Dividends to shareholders	(87)		(87)
Net change in fair value of financial instruments	(2)			(2)
Net foreign currency translation adjustments	147			146	1
Net postretirement benefit obligation	18			18
Ending Balance (in shares) at Mar. 31, 2017		262.8
Ending Balance at Mar. 31, 2017	5,826	$ 5,570	3,934	(3,750)	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	610		594		16
Shares issued - employee stock compensation plans (in shares)		1.5
Shares issued - employee stock compensation plans	(109)	$ (109)
Shares purchased (in shares)		(3.9)
Shares purchased	(553)		(553)
Share-based compensation expense	77	$ 77
Dividends to shareholders	(89)		(89)
Net change in fair value of financial instruments	14			14
Net foreign currency translation adjustments	247			244	3
Net postretirement benefit obligation	$ 48			48
Ending Balance (in shares) at Mar. 31, 2018	245.2	245.2
Ending Balance at Mar. 31, 2018	$ 5,385	$ 5,745	$ 2,747	$ (3,191)	$ 84