| Estimated Future Benefits Payable for Retirement and Postretirement Plans (Detail) (USD $) In Millions, unless otherwise specified | Dec. 31, 2012 | 
|---|---|
| U.S. Defined Benefit Plan | |
| Defined Benefit Plan Disclosure [Line Items] | |
| 2013 | $ 40.3 | 
| 2014 | 40.7 | 
| 2015 | 40.6 | 
| 2016 | 40.7 | 
| 2017 | 40.4 | 
| Next five fiscal years to December 31, 2022 | 199.7 | 
| Non-U.S. Defined Benefit Plan | |
| Defined Benefit Plan Disclosure [Line Items] | |
| 2013 | 2.7 | 
| 2014 | 2.7 | 
| 2015 | 2.7 | 
| 2016 | 2.8 | 
| 2017 | 3.0 | 
| Next five fiscal years to December 31, 2022 | 16.3 | 
| Other Benefits | |
| Defined Benefit Plan Disclosure [Line Items] | |
| 2013 | 2.2 | 
| 2014 | 2.2 | 
| 2015 | 2.2 | 
| 2016 | 2.0 | 
| 2017 | 2.0 | 
| Next five fiscal years to December 31, 2022 | $ 9.1 | 
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- Details 
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- Definition Amount of benefits expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year from a defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of benefits expected to be paid in the next fiscal year following the latest fiscal year from a defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of benefits expected to be paid in the fifth fiscal year following the latest fiscal year from a defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of benefits expected to be paid in the fourth fiscal year following the latest fiscal year from a defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of benefits expected to be paid in the third fiscal year following the latest fiscal year from a defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of benefits expected to be paid in the second fiscal year following the latest fiscal year from a defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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