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Fair Value Measurements Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Operating Lease, Impairment Loss     $ 23.5 $ 6.7  
Fair Value, Nonrecurring          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Impairment of Intangible Assets (Excluding Goodwill)         $ 6.2
Fair Value, Nonrecurring | Level 3          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Operating Lease, Impairment Loss $ 23.5 $ 6.7      
Tangible Asset Impairment Charges $ 10.3 $ 0.2