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Recently Issued and Adopted Accounting Pronouncements and Regulatory Items - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2020
Dec. 31, 2019
Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Income tax effects reclassified from AOCI to retained earnings $ (53.1)      
Right-of-use asset   $ 155.8 $ 164.7  
Lease liability   184.1    
Prepaid rent, accrued rent and lease incentives reclassified   $ 513.0 $ 487.5  
Adoption of accounting standard       $ 2.4
Retained Earnings        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Adoption of accounting standard       $ 55.5