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Leases - Cash flow information, weighted average remaining term and discount rate (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Leases
Gains on sale and leaseback transactions, net		$ (0.2)
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 174.2	177.0
Right-of-use assets obtained in exchange for operating lease liabilities	$ 63.9	$ 99.1
Weighted-average remaining lease term - operating leases	25 years		25 years
Weighted-average discount rate - operating leases	6.40%		6.60%

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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.

+ References

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-Publisher FASB
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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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

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Amount of gain (loss) on sale and leaseback transaction from transfer of asset accounted for as sale.

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