Lessee Arrangements - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions		3 Months Ended
	Jan. 01, 2019	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases		$ 3.2	$ 3.3
Operating lease right of use assets obtained in exchange for new lease obligations:		$ 7.7	$ 41.8	$ 1.0
ASU 2016-02 - Topic 842
Cash paid for amounts included in the measurement of lease liabilities:
Operating lease right of use assets obtained in exchange for new lease obligations:	$ 40.8