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Benefit Plans (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discretionary contributions to benefit plans | $ 19.4 | $ 20.8 | $ 20.1
Controlling interests |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discretionary contributions to benefit plans | $ 3.6 | $ 4.8 | $ 3.9

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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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