Condensed Consolidated Statement of Shareholders' Equity (USD $) In Millions, unless otherwise specified	Total	Ordinary Shares and Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss, Net of Tax [Member]	Non-controlling Interests [Member]
Beginning Balance at Dec. 31, 2012	$ 7,805	$ 4,439	$ 5,933	$ (2,610)	$ 43
Beginning Balance (in shares) at Dec. 31, 2012	310.9	310.9
Increase (Decrease) in Shareholders' Equity
Net income	788		758		30
Shares issued - employee benefit plans (in shares)		0.7
Shares issued - employee benefit plans	29	29
Shares issued - employee compensation (in shares)		5.2
Shares issued - employee compensation	(49)	(49)
Shares purchased (in shares)		(15.8)
Shares purchased	(1,025)		(1,025)
Tax benefit - employee benefit plans	42	42
Share-based compensation expense	207	207
Dividends to shareholders	(159)		(159)
Net change in fair value of investments	(1)			(1)
Net change in fair value of derivatives	(12)			(12)
Net foreign currency translation adjustments	(77)			(78)	1
Net post-retirement benefit obligation	65			65
Purchase of subsidiary shares from non-controlling interests	(11)	(5)			(6)
Dividends paid to non-controlling interests on subsidiary common stock	(12)				(12)
Ending Balance at Sep. 30, 2013	$ 7,590	$ 4,663	$ 5,507	$ (2,636)	$ 56
Ending Balance (in shares) at Sep. 30, 2013	301.0	301.0