Activity in Restructuring Reserve (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended						36 Months Ended	3 Months Ended	36 Months Ended
	Mar. 31, 2012 Operational Excellence Initiatives 2011	Dec. 31, 2011 Operational Excellence Initiatives 2011	Mar. 31, 2012 Operational Excellence Initiatives 2011 Severance	Dec. 31, 2011 Operational Excellence Initiatives 2011 Severance	Dec. 31, 2011 Operational Excellence Initiatives 2011 Other	Mar. 31, 2012 Global Location Strategy 2009	Dec. 31, 2011 Global Location Strategy 2009	Mar. 31, 2012 Global Location Strategy 2009 Severance	Dec. 31, 2011 Global Location Strategy 2009 Severance	Dec. 31, 2011 Global Location Strategy 2009 Asset Write-offs/Other	Mar. 31, 2012 Global Location Strategy 2009 Asset Write-offs/Other
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 74	$ 107	$ 74	$ 78	$ 29	$ 38	$ 139	$ 27	$ 102	$ 37	$ 11
Additional charges (recovery)	(2)		(2)			(7)	20	(7)	14	6
Utilization	(10)	(33)	(10)	(4)	(29)	(7)	(121)	(7)	(89)	(32)
Ending Balance	$ 62	$ 74	$ 62	$ 74		$ 24	$ 38	$ 13	$ 27	$ 11	$ 11