Consolidated Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Ordinary Shares and Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss, Net of Tax [Member]	Noncontrolling Interests [Member]
Balance (in shares) at Dec. 31, 2012		310.9
Balance at Dec. 31, 2012	$ 7,805	$ 4,439	$ 5,933	$ (2,610)	$ 43
Increase (Decrease) in Shareholders' Equity
Net income	1,148		1,113		35
Shares issued - employee benefit plan (in shares)		0.7
Shares issued — employee benefit plan	27	$ 28	(1)
Shares issued - employee compensation (in shares)		5.9
Shares issued — employee compensation	(50)	$ (50)	0
Shares purchased (in shares)		(16.8)
Shares purchased	(1,102)		(1,102)
Tax benefit — employee benefit plans	74	$ 74
Share-based compensation expense	300	300
Dividends to shareholders	(212)		(212)
Net change in fair value of financial instruments	7
Net change in fair value of derivatives	7			7
Net foreign currency translation adjustments	(65)			(64)	(1)
Net post-retirement benefit obligation	293			293
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	(11)	$ (3)			(8)
Dividends paid to non-controlling interests on subsidiary common stock	(19)				(19)
Balance (in shares) at Dec. 31, 2013		300.7
Balance at Dec. 31, 2013	8,195	$ 4,788	5,731	(2,374)	50
Increase (Decrease) in Shareholders' Equity
Net income	1,431		1,397		34
Shares issued - employee benefit plan (in shares)		0.4
Shares issued — employee benefit plan	26	$ 26
Shares issued - employee compensation (in shares)		4.7
Shares issued — employee compensation	(131)	$ (131)
Shares purchased (in shares)		(25.8)
Shares purchased	(2,250)		(2,250)
Tax benefit — employee benefit plans	89	$ 89
Share-based compensation expense	328	328
Dividends to shareholders	(273)		(273)
Net change in fair value of financial instruments	4			4
Net foreign currency translation adjustments	(507)			(504)	(3)
Net post-retirement benefit obligation	(260)			(260)
Sales of subsidiary shares to non-controlling interest	3	$ 0			3
Dividends paid to non-controlling interests on subsidiary common stock	$ (24)				(24)
Balance (in shares) at Dec. 31, 2014	280.0	280.0
Balance at Dec. 31, 2014	$ 6,631	$ 5,100	4,605	(3,134)	60
Increase (Decrease) in Shareholders' Equity
Net income	1,422		1,385		37
Shares issued - employee benefit plan (in shares)		0.5
Shares issued — employee benefit plan	33	$ 33
Shares issued - employee compensation (in shares)		5.3
Shares issued — employee compensation	(188)	$ (188)
Shares purchased (in shares)		(16.0)
Shares purchased	(1,550)		(1,550)
Tax benefit — employee benefit plans	126	$ 126
Share-based compensation expense	340	340
Dividends to shareholders	(323)		(323)
Net change in fair value of financial instruments	(8)			(8)
Net foreign currency translation adjustments	(442)			(436)	(6)
Net post-retirement benefit obligation	155			155
Sales of subsidiary shares to non-controlling interest	(6)	$ 1			(7)
Dividends paid to non-controlling interests on subsidiary common stock	$ (27)				(27)
Balance (in shares) at Dec. 31, 2015	269.8	269.8
Balance at Dec. 31, 2015	$ 6,163	$ 5,412	$ 4,117	$ (3,423)	$ 57