Pensions and Other Postretirement Benefits Expected Benefit Payments (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Pension Benefits, U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Benefit Payments in Year One	$ 38.5
Pension Benefit Payments in Year Two	43.3
Pension Benefit Payments in Year Three	47.8
Pension Benefit Payments in Year Four	53.9
Pension Benefit Payments in Year Five	59.4
Pension Benefit Payments in Five Fiscal Years Thereafter	408.5
Pension Benefits, Non U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Benefit Payments in Year One	5.0
Pension Benefit Payments in Year Two	5.6
Pension Benefit Payments in Year Three	5.8
Pension Benefit Payments in Year Four	6.4
Pension Benefit Payments in Year Five	6.7
Pension Benefit Payments in Five Fiscal Years Thereafter	39.8
Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Benefit Payments in Year One	17.3
Prescription Drug Subsidy Receipts, Year One	1.7
Net OPEB Payments in Year One	15.6
Pension Benefit Payments in Year Two	17.4
Prescription Drug Subsidy Receipts, Year Two	1.9
Net OPEB Payments in Year Two	15.5
Pension Benefit Payments in Year Three	17.4
Prescription Drug Subsidy Receipts, Year Three	2.1
Net OPEB Payments in Year Three	15.3
Pension Benefit Payments in Year Four	17.2
Prescription Drug Subsidy Receipts, Year Four	2.3
Net OPEB Payments in Year Four	14.9
Pension Benefit Payments in Year Five	16.8
Prescription Drug Subsidy Receipts, Year Five	2.4
Net OPEB Payments in Year Five	14.4
Pension Benefit Payments in Five Fiscal Years Thereafter	77.8
Prescription Drug Subsidy Receipts, Five Fiscal Years Thereafter	14.6
Net OPEB Payments in Five Fiscal Years Thereafter	$ 63.2