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Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 9.3	$ 33.3
Operating cash flows for finance leases	0.4	1.2
Financing cash flows for finance leases	8.2	18.4
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	27.3	27.8
Finance leases	$ 1.4	$ 1.4

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Cash paid for amounts included in the measurement of lease liabilities: [Abstract]

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Amount of cash outflow for principal payment on finance lease.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 5
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