Consolidated Statement of Shareholders' Equity (USD $) In Millions, unless otherwise specified	Total	Ordinary Shares and Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss, Net of Tax	Non-controlling Interests
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	386.4
Increase (Decrease) in Shareholders' Equity
Net income	713		688			25
Retirement of treasury shares		(60)	(2,412)	2,472
Retirement of treasury shares (in shares)		(60.0)
Shares issued - employee benefit plans	20	20
Shares issued - employee benefit plans (in shares)		3.0
Shares purchased	(625)		(525)	(100)
Shares purchased (in shares)		(10.7)
Shares reissued - employee benefit plans	(13)	(181)	(13)	181
Tax benefit - employee benefit plans	30	30
Share-based compensation expense	160	160
Dividends to shareholders	(153)		(153)
Change in net derivative gains/losses	5				5
Net foreign currency translation adjustments	71				69	2
Net post-retirement benefit obligation	46				46
Purchase of subsidiary shares from non-controlling interests	4					4
Dividends paid to non-controlling interests on subsidiary common stock	(17)					(17)
Balance at Sep. 30, 2012	$ 8,361	$ 4,376	$ 6,179		$ (2,250)	$ 56
Balance (in shares) at Sep. 30, 2012	318.7	318.7