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Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2022
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Account
SCHEDULE II

VALUATION AND QUALIFYING ACCOUNTS
Years Ended December 31, 2022, 2021, and 2020

Allowance for Doubtful Accounts (in millions)
Balance at
Beginning
of Year
Charged to Cost and
Expense (1)
Accounts
Written Off		Balance at
End of Year
Year Ended December 31, 2022
Allowance for Doubtful Accounts$0.2 1.0 (0.1)$1.1 
Year Ended December 31, 2021
Allowance for Doubtful Accounts$1.6 (0.2)(1.2)$0.2 
Year Ended December 31, 2020
Allowance for Doubtful Accounts$0.8 0.8 — $1.6 
(1) Net of recoveries on previously reserved or written-off balances.
  
Deferred Tax Valuation Allowance (in millions)
Balance at
Beginning
of Year		AdditionsReductionsBalance at
End of Year
Year Ended December 31, 2022
Deferred Tax Valuation Allowance$39.1 0.6 — $39.7 
Year Ended December 31, 2021
Deferred Tax Valuation Allowance$98.0 — (58.9)$39.1 
Year Ended December 31, 2020
Deferred Tax Valuation Allowance$85.3 12.7 — $98.0