Recently Issued Accounting Pronouncements - Topic 842 (Details) - USD ($) $ in Millions	Jun. 30, 2019	Mar. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets	$ 122.1
Accrued lease liabilities	38.7	$ 0.0
Other long term liabilities	$ 100.6
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets		124.6
Accrued lease liabilities		39.4
Other long term liabilities		$ 97.9