Recently Issued Accounting Standards - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jan. 01, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Operating lease right-of-use asset	$ 415.6
Total lease liability	$ 417.6
ASU No. 2016-02
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Operating lease right-of-use asset		$ 458.1
Total lease liability		$ 458.7