Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Fair Value  
Assets and Liabilities:  
Deferred Compensation Plan Assets (1) $ 46.1
Deferred Compensation Plan Liability (1) (46.1)
Total assets and liabilities 0.0
Quoted Prices in Active Markets for Identical Assets (Level 1)  
Assets and Liabilities:  
Deferred Compensation Plan Assets (1) 46.1
Deferred Compensation Plan Liability (1) 0.0
Total assets and liabilities 46.1
Significant Other Observable Inputs (Level 2)  
Assets and Liabilities:  
Deferred Compensation Plan Assets (1) 0.0
Deferred Compensation Plan Liability (1) (46.1)
Total assets and liabilities (46.1)
Significant Unobservable Inputs (Level 3)  
Assets and Liabilities:  
Deferred Compensation Plan Assets (1) 0.0
Deferred Compensation Plan Liability (1) 0.0
Total assets and liabilities $ 0.0