Recently Adopted and New Accounting Standards - ASU 2016-02 (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use assets	$ 73.1	$ 0.0
Operating Lease, Liability	79.5
Adjustments for New Accounting Pronouncement [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use assets	85.0
Operating Lease, Liability	$ 90.0