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Defined Contribution Plans - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
United States Pension Plans Of US Entity, Defined Contribution [Member] | UNITED STATES |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Expense recognized | $ 26.5 | $ 25.3 | $ 22.6
Supplemental matching | 4.8 | 4.3 | 4.0
Foreign Pension Plans, Defined Contribution [Member] | UNITED KINGDOM |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Expense recognized | $ 4.0 | $ 4.5 | $ 4.0

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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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