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Pensions - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2016 | Jun. 30, 2016 | Jun. 30, 2015
Defined Benefit Plan Disclosure [Line Items] |  |  |
Payments for repurchase of common stock |  | $ 33.1 | $ 5.0
Actuarial losses recognized | $ 0.4 |  |
Common Stock |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Payments for repurchase of common stock |  | 3.6 |
U.S. Benefit Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Benefits paid |  | 3.1 | 3.3
Estimated future employer contributions in current year |  | 7.2 |
Non-U.S. Benefit Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Benefits paid |  | 0.7 | $ 1.1
Estimated future employer contributions in current year |  | $ 1.4 |

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- Definition The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Benefits -URI http://asc.fasb.org/extlink&oid=49170737 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Postretirement Benefits -URI http://asc.fasb.org/extlink&oid=6521376 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(5) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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