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Leases - Supplemental Cash Flow Information Related to Leases (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 1.5	$ 11.2
Operating cash flows from finance leases	0.4
Financing cash flows from finance leases	3.3	0.4
Lease assets obtained in exchange for new lease liabilities:
Operating leases	$ 4.4	3.7
Financing leases		$ 8.8

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- Definition

Cash paid for amounts included in measurement of lease liabilities.

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Right-of-use assets obtained in exchange for lease liabilities.

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Amount of interest paid on finance lease liability.

+ References

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Amount of cash outflow for principal payment on finance lease.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Amount of increase in right-of-use asset obtained in exchange for finance lease liability.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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