Activity in Restructuring Reserve (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended	3 Months Ended	6 Months Ended		3 Months Ended			12 Months Ended	39 Months Ended	3 Months Ended	39 Months Ended
	Jun. 30, 2012 Operational Efficiency Initiatives 2011	Mar. 31, 2012 Operational Efficiency Initiatives 2011	Dec. 31, 2011 Operational Efficiency Initiatives 2011	Mar. 31, 2012 Operational Efficiency Initiatives 2011	Jun. 30, 2012 Operational Efficiency Initiatives 2011 Severance	Mar. 31, 2012 Operational Efficiency Initiatives 2011 Severance	Mar. 31, 2012 Operational Efficiency Initiatives 2011 Other	Jun. 30, 2012 Global Location Strategy 2009	Mar. 31, 2012 Global Location Strategy 2009	Jun. 30, 2011 Global Location Strategy 2009	Dec. 31, 2009 Global Location Strategy 2009	Mar. 31, 2012 Global Location Strategy 2009	Jun. 30, 2012 Global Location Strategy 2009 Severance	Mar. 31, 2012 Global Location Strategy 2009 Severance	Mar. 31, 2012 Global Location Strategy 2009 Asset Write-offs/Other	Jun. 30, 2012 Global Location Strategy 2009 Asset Write-offs/Other
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 62		$ 107	$ 107	$ 62	$ 78	$ 29	$ 24			$ 139	$ 139	$ 13	$ 102	$ 37	$ 11
Additional charges (recovery)		(2)	107	(2)		(2)		(4)	(7)	(4)	139	13	(4)	7	6
Utilization	(11)			(43)	(11)	(14)	(29)	(4)				(128)	(4)	(96)	(32)
Ending Balance	$ 51	$ 62		$ 62	$ 51	$ 62		$ 16	$ 24			$ 24	$ 5	$ 13	$ 11	$ 11