Consolidated Statements of Shareholders' Equity (USD $) In Millions, unless otherwise specified	Total	Ordinary Shares and Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss, Net of Tax [Member]	Noncontrolling Interests [Member]
Balance at Dec. 31, 2011	$ 8,120	$ 4,407	$ 8,594	$ (2,553)	$ (2,370)	$ 42
Balance (in shares) at Dec. 31, 2011		386.4
Increase (Decrease) in Shareholders' Equity
Net income	1,020		993			27
Retirement of treasury shares (in shares)		(60.0)
Retirement of treasury shares	0	(60)	(2,412)	2,472
Shares issued - employee benefit plans (in shares)		4.0
Shares issued — employee benefit plans	29	29	0
Shares purchased (in shares)		(19.5)
Shares purchased	(1,125)		(1,025)	(100)
Shares reissued — employee benefit plans	(13)	(181)	(13)	181
Tax benefit — employee benefit plans	33	33
Share-based compensation expense	212	212
Dividends to shareholders	(204)		(204)
Change in fair value of investments	0
Net change in fair value of derivatives	9				9
Net foreign currency translation adjustments	109				109
Net post-retirement benefit obligation	(358)				(358)
Purchase of subsidiary shares from non-controlling interest	0	(1)				1
Dividends paid to non-controlling interests on subsidiary common stock	(27)					(27)
Balance at Dec. 31, 2012	7,805	4,439	5,933	0	(2,610)	43
Balance (in shares) at Dec. 31, 2012		310.9
Increase (Decrease) in Shareholders' Equity
Net income	1,148		1,113			35
Shares issued - employee benefit plans (in shares)		0.7
Shares issued — employee benefit plans	27	28	(1)
Shares issued - employee compensation (in shares)		5.9
Shares issued — employee compensation	(50)	(50)
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)
Change in fair value of investments	1				1
Net change in fair value of derivatives	6				6
Net foreign currency translation adjustments	(65)				(64)	(1)
Net post-retirement benefit obligation	293				293
Purchase of subsidiary shares from non-controlling interest	(11)	(3)				(8)
Dividends paid to non-controlling interests on subsidiary common stock	(19)					(19)
Balance at Dec. 31, 2013	8,195	4,788	5,731	0	(2,374)	50
Balance (in shares) at Dec. 31, 2013	300.7	300.7
Increase (Decrease) in Shareholders' Equity
Net income	1,431		1,397			34
Shares issued - employee benefit plans (in shares)		0.4
Shares issued — employee benefit plans	26	26	0
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)
Change in fair value of investments	(1)				(1)
Net change in fair value of derivatives	5				5
Net foreign currency translation adjustments	(507)				(504)	(3)
Net post-retirement benefit obligation	(260)				(260)
Sales of subsidiary shares to non-controlling interest	3					3
Dividends paid to non-controlling interests on subsidiary common stock	(24)					(24)
Balance at Dec. 31, 2014	$ 6,631	$ 5,100	$ 4,605	$ 0	$ (3,134)	$ 60
Balance (in shares) at Dec. 31, 2014	280.0	280.0