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	503		484			19
Retirement of treasury shares		(60)	(2,412)	2,472
Retirement of treasury shares (in shares)		(60.0)
Shares issued - employee benefit plans	(10)	(10)
Shares issued - employee benefit plans (in shares)		1.3
Shares purchased	(350)		(250)	(100)
Shares purchased (in shares)		(5.3)
Shares reissued - employee benefit plans	(12)	(181)	(12)	181
Tax benefit - employee benefit plans	21	21
Share-based compensation expense	105	105
Dividends to shareholders	(102)		(102)
Change in net derivative gains/losses	(10)				(10)
Net foreign currency translation adjustments	(93)				(91)	(2)
Net post-retirement benefit obligation	39				39
Purchase of subsidiary shares from non-controlling interest	5					5
Dividends paid to non-controlling interests on subsidiary common stock	(6)					(6)
Balance at Jun. 30, 2012	$ 8,210	$ 4,282	$ 6,302		$ (2,432)	$ 58
Balance (in shares) at Jun. 30, 2012	322.4	322.4