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Contingent Acquisition Obligations (Details) $ in Millions | Dec. 31, 2020 USD ($)
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Deferred acquisition payments |
Business Acquisition, Contingent Consideration [Line Items] |
Future contingent acquisition obligation due in 2018 | $ 47.9
Future contingent acquisition obligation due in 2019 | 10.9
Future contingent acquisition obligation due in 2020 | 7.0
Future contingent acquisition obligation due in 2021 | 8.4
Future contingent acquisition obligation due in 2022 | 0.0
Future contingent acquisition obligation due thereafter | 2.9
Future contingent acquisition obligation due, total | 77.1
Redeemable noncontrolling interests and call options with affiliates |
Business Acquisition, Contingent Consideration [Line Items] |
Future contingent acquisition obligation due in 2018 | 17.2
Future contingent acquisition obligation due in 2019 | 23.3
Future contingent acquisition obligation due in 2020 | 26.8
Future contingent acquisition obligation due in 2021 | 1.5
Future contingent acquisition obligation due in 2022 | 0.7
Future contingent acquisition obligation due thereafter | 0.0
Future contingent acquisition obligation due, total | 69.5
Redeemable at noncontrolling equity owners discretion |
Business Acquisition, Contingent Consideration [Line Items] |
Future contingent acquisition obligation due in 2018 | 14.2
Total contingent acquisition payments |
Business Acquisition, Contingent Consideration [Line Items] |
Future contingent acquisition obligation due in 2018 | 65.1
Future contingent acquisition obligation due in 2019 | 34.2
Future contingent acquisition obligation due in 2020 | 33.8
Future contingent acquisition obligation due in 2021 | 9.9
Future contingent acquisition obligation due in 2022 | 0.7
Future contingent acquisition obligation due thereafter | 2.9
Future contingent acquisition obligation due, total | $ 146.6

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