Amounts Recognized in Balance Sheet (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total Included in Accumulated Other Comprehensive Income (Loss)	$ 444.1	$ 318.6
Pension Benefits, U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Current Liabilitity	4.5	4.2
Noncurrent Liability	404.5	168.9
Noncurrent Asset	0	0
Underfunded (Overfunded) Status	409.0	173.1
Net Actuarial Gain (Loss)	(673.1)	(497.5)
Prior Service Credit (Cost)	(0.2)	0.3
Unrecognized Pension and Postretirement Benefit Costs, Before Tax	(673.3)	(497.2)
Deferred Income Tax Asset	235.7	174.0
Total Included in Accumulated Other Comprehensive Income (Loss)	(437.6)	(323.2)	(294.1)
Pension Benefits, Non U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Current Liabilitity	0	0
Noncurrent Liability	0	0
Noncurrent Asset	(17.6)	(23.1)
Underfunded (Overfunded) Status	(17.6)	(23.1)
Net Actuarial Gain (Loss)	(25.0)	(16.3)
Prior Service Credit (Cost)	(0.2)	(0.2)
Unrecognized Pension and Postretirement Benefit Costs, Before Tax	(25.2)	(16.5)
Deferred Income Tax Asset	8.0	5.8
Total Included in Accumulated Other Comprehensive Income (Loss)	(17.2)	(10.7)	(39.5)
Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Current Liabilitity	14.4	14.1
Noncurrent Liability	164.8	159.1
Noncurrent Asset	0	0
Underfunded (Overfunded) Status	179.2	173.2
Net Actuarial Gain (Loss)	(4.1)	1.4
Prior Service Credit (Cost)	4.9	7.5	4.4
Unrecognized Pension and Postretirement Benefit Costs, Before Tax	0.8	8.9
Deferred Income Tax Asset	9.9	6.4
Total Included in Accumulated Other Comprehensive Income (Loss)	$ 10.7	$ 15.3	$ 2.9