Condensed Consolidated Statement of Shareholders' Equity (USD $) In Millions, unless otherwise specified	Total	Ordinary Shares and Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss, Net of Tax	Non-controlling Interests
Balance at Dec. 31, 2012	$ 7,805	$ 4,439	$ 5,933	$ (2,610)	$ 43
Balance (in shares) at Dec. 31, 2012	310.9	310.9
Increase (Decrease) in Shareholders' Equity
Net income	272		261		11
Shares issued - employee benefit plans (in shares)		0.4
Shares issued - employee benefit plans	16	16
Shares issued - employee compenation (in shares)		2.8
Shares issued - employee compensation	(36)	(36)
Shares purchased (in shares)		(5.0)
Shares purchased	(300)		(300)
Tax benefit - employee benefit plans	21	21
Share-based compensation expense	69	69
Dividends to shareholders	(50)		(50)
Net change in fair value of derivatives	(14)			(14)
Net foreign currency translation adjustments	(174)			(174)
Net post-retirement benefit obligation	23			23
Purchase of subsidiary shares from non-controlling interests	1	1
Balance at Mar. 31, 2013	$ 7,633	$ 4,510	$ 5,844	$ (2,775)	$ 54
Balance (in shares) at Mar. 31, 2013	301.9	309.1