Description of Business and Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Millions	Oct. 01, 2019	Dec. 31, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
ROU assets		$ 696.8
Operating lease liabilities		$ 752.9
ASU 2018-02 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Reclassification of stranded tax effects from accumulated other comprehensive income to retained earnings	$ 73.4
ASC 842 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
ROU assets	731.1
Operating lease liabilities	$ 783.9