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Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	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

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

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