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Leases - Table 1 (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Lease, Cost [Abstract]
Operating lease cost	$ 17.5
Amortization of right-of-use assets	11.9
Interest of lease liabilities	8.1
Total finance lease cost	20.0
Short-term and variable lease cost	0.3
Sublease income	(0.8)
Total lease cost	$ 37.0

X

- Definition

Amount of short-term lease cost, excluding expense for lease with term of one month or less, plus the amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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Amount of finance lease cost recognized by lessee for lease contract.

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- Definition

Amount of interest expense on finance lease liability.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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