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Leases - Table 1 (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Lease, Cost [Abstract]
Operating lease cost	$ 18.3	$ 35.8
Amortization of right-of-use assets	7.9	15.8
Interest of lease liabilities	8.1	16.2
Total finance lease cost	16.0	32.0
Short-term and variable lease cost	0.1	0.4
Sublease income	(0.7)	(1.5)
Total lease cost	$ 33.7	$ 66.7

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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Amount of interest expense on finance lease liability.

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Amount of amortization expense attributable to right-of-use asset from finance lease.

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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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