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Leases - Operating Lease Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net lease cost	$ 92.4	$ 86.7
Research and development
Operating lease cost	5.2	6.7
Variable lease cost	1.1	1.2
Selling, general and administrative
Operating lease cost	93.1	84.6
Variable lease cost	21.1	23.7
Sublease income	(24.2)	(25.6)
Other (income) expense, net
Sublease income	$ (3.9)	$ (3.9)

X

- Definition

Amount of lease cost recognized by lessee for lease contract.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
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X

- 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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X

- Definition

Amount of sublease income excluding finance and operating lease expense.

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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.

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