Leases - Components of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2019
Lease Expense
Operating, selling, general and administrative expenses	$ 10.0	$ 31.1
Operating, asset impairments	1.4	1.4
Variable	0.6	1.6
Sublease income	(0.4)	(1.0)
Finance:
Amortization of lease assets	1.7	4.1
Interest on lease liabilities	1.5	3.5
Net lease expense	$ 14.8	$ 40.7

Finance Lease, Cost1 [Abstract]

No definition available.

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- Definition

Amount of interest expense on finance lease liability.

+ References

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+ Details

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- Definition

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

+ References

+ Details

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- Definition

Amount of lease cost recognized by lessee for lease contract.

+ References

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- References

No definition available.

+ Details

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- Definition

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.

+ References

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-Publisher FASB
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- Definition

Amount of loss from impairment of right-of-use asset from operating lease.

+ References

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+ Details

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- Definition

Amount of sublease income excluding finance and operating lease expense.

+ References

+ Details

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- Definition

Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

+ References

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