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Goodwill and Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Activity Related to Goodwill
A summary of the changes in the carrying amount of goodwill follows (in millions):
December 31,
20202019
Balance at beginning of period$3,402.4 $3,382.8 
Acquisitions, including post acquisition adjustments154.7 22.3 
Disposals and deconsolidations(55.6)(0.2)
Impairments(33.5)(2.5)
Balance at end of period$3,468.0 $3,402.4 
Summary of Components of Indefinite-Lived Intangible Assets
A summary of the components of intangible assets follows (in millions):
December 31, 2020December 31, 2019
Gross Carrying AmountAccumulated AmortizationNetGross Carrying AmountAccumulated AmortizationNet
Finite-lived intangible assets:
Management rights agreements$31.1 $(10.1)$21.0 $31.1 $(7.3)$23.8 
Other13.6 (6.5)7.1 8.8 (4.5)4.3 
Total finite-lived intangible assets44.7 (16.6)28.1 39.9 (11.8)28.1 
Indefinite-lived intangible assets18.8 — 18.8 19.2 — 19.2 
Total intangible assets$63.5 $(16.6)$46.9 $59.1 $(11.8)$47.3 
Summary of Components of Finite-Lived Intangible Assets
A summary of the components of intangible assets follows (in millions):
December 31, 2020December 31, 2019
Gross Carrying AmountAccumulated AmortizationNetGross Carrying AmountAccumulated AmortizationNet
Finite-lived intangible assets:
Management rights agreements$31.1 $(10.1)$21.0 $31.1 $(7.3)$23.8 
Other13.6 (6.5)7.1 8.8 (4.5)4.3 
Total finite-lived intangible assets44.7 (16.6)28.1 39.9 (11.8)28.1 
Indefinite-lived intangible assets18.8 — 18.8 19.2 — 19.2 
Total intangible assets$63.5 $(16.6)$46.9 $59.1 $(11.8)$47.3 
Summary of Scheduled Amortization
Total estimated amortization expense for the next five years and thereafter related to intangible assets follows (in millions):
2021$5.7 
20223.8 
20232.9 
20242.5 
20251.9 
Thereafter11.3 
Total$28.1