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Leases - Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Lease Cost
Amortization of Right-of-Use Assets - Finance Leases	$ 0.1	$ 0.1	$ 0.2	$ 0.3
Operating Lease Cost	5.2	5.5	10.8	11.2
Short-Term Lease Cost	0.0	0.0	0.0	0.1
Total Expense	5.3	5.6	11.0	11.6
Less: Sublease Income	0.0	0.0	0.0	0.1
Total Lease Cost	$ 5.3	$ 5.6	$ 11.0	$ 11.5

X

- Definition

Operating Lease, Right-Of-Use Asset, Amortization

+ References

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- Definition

Amount of lease cost recognized by lessee for lease contract.

+ References

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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.

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- Definition

Amount of operating lease expense. Excludes sublease income.

+ References

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- Definition

Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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- Definition

Amount of sublease income excluding finance and operating lease expense.

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