Valuation and Qualifying Accounts and Reserves (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reserves against accounts receivable:
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves
Balance at beginning of period	$ (12.2)	$ (9.7)	$ (8.8)
(Charges) Income	(3.2)	(2.3)	(2.0)
Deductions from (increase to) reserves and other	1.0	(0.2)	1.1
Balance at end of period	(14.4)	(12.2)	(9.7)
Valuation allowances against deferred tax assets:
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves
Balance at beginning of period	(151.4)	(199.1)	(219.6)
(Charges) Income	5.1	57.9	25.2
Deductions from (increase to) reserves and other	(6.9)	(10.2)	(4.7)
Balance at end of period	$ (153.2)	$ (151.4)	$ (199.1)

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount of valuation and qualifying accounts and reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09(Column B))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09(Column E))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690

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- Definition

Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense.

+ References

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- Definition

Amount of decrease in valuation and qualifying accounts and reserves.

+ References

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