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CONSOLIDATED BALANCE SHEETS Parentheticals - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Condensed Balance Sheet Statements, Captions [Line Items]    
Allowance for Doubtful Accounts Receivable $ 5.6 $ 5.4
Restricted Cash and Cash Equivalents, Current 4.8 4.7
Restricted Cash and Cash Equivalents, Noncurrent $ 0.5 $ 0.6
Preferred Stock, Shares Issued 4,600,000  
Series A junior participating preferred stock [Member]    
Condensed Balance Sheet Statements, Captions [Line Items]    
Preferred Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
Preferred Stock, Shares Authorized 10,000,000 10,000,000
Preferred Stock, Shares Issued 0 0
Preferred Stock, Shares Outstanding 4,600 0
Series B Preferred Stock [Member]    
Condensed Balance Sheet Statements, Captions [Line Items]    
Preferred Stock, Par or Stated Value Per Share $ 0 $ 0
Preferred Stock, Shares Authorized 0 0
Preferred Stock, Shares Issued 0 0
Preferred Stock, Shares Outstanding 0 0
Class A Common Stock (Shares) [Member]    
Condensed Balance Sheet Statements, Captions [Line Items]    
Common Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
Common Stock, Shares Authorized 1,000,000,000 1,000,000,000
Common Stock, Shares, Issued 358,599,000 358,110,000
Common Stock, Shares, Outstanding 358,599,000 358,110,000
Class B Common Stock (Shares) [Member]    
Condensed Balance Sheet Statements, Captions [Line Items]    
Common Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
Common Stock, Shares Authorized 3,000 3,000
Common Stock, Shares, Issued 3,000 3,000
Common Stock, Shares, Outstanding 3,000 3,000