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Pensions - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
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3 Months Ended |
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Mar. 31, 2015
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Mar. 31, 2014
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Dec. 31, 2014
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| Defined Benefit Plan Disclosure [Line Items] |
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| Payments for Repurchase of Common Stock |
$ 3.6 |
$ 0 |
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| U.S. Benefit Plans |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Defined Benefit Plan, Benefits Paid |
1.6 |
1.5 |
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| Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year |
7.8 |
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| Non-U.S. Benefit Plan |
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|
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| Defined Benefit Plan Disclosure [Line Items] |
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|
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| Defined Benefit Plan, Benefits Paid |
1.1 |
0.4 |
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| Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year |
1.2 |
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| Common Stock |
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|
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| Defined Benefit Plan Disclosure [Line Items] |
|
|
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| Payments for Repurchase of Common Stock |
3.6 |
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| Defined Benefit Plan, Number of Shares of Equity Securities Issued by Employer and Related Parties Included in Plan Assets |
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0.2 |
| Defined Benefit Plan, Amount of Employer and Related Party Securities Included in Plan Assets |
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$ 3.6 |