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Leases - Other Information Related to Leases (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
Operating Leases
Weighted-average remaining lease term (years)	6 years 4 months 24 days
Weighted-average discount rate	6.00%
Finance Leases
Weighted-average remaining lease term (years)	5 years 6 months
Weighted-average discount rate	2.70%
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$ 0.3
Operating cash flows from operating leases	26.5
Cash paid for amounts included in the measurement of lease liabilities:
Financing cash flows from finance leases	1.8
Right of use assets obtained in exchange for new operating lease liability	15.8
Right of use assets obtained in exchange for new operating lease liability	$ 4.0

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