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Leases - Schedule of Consolidated Statement Of Operation Related To Leases (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Operating lease cost:    
Operating lease cost $ 47.4 $ 150.5
Variable lease costs 6.3 18.5
Finance lease cost:    
Amortization of leased assets 1.2 3.5
Interest on lease liabilities $ 0.1 $ 0.4