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Fair Value Measurements (Tables)
3 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
December 31, 2021September 30, 2021
TotalLevel 1Level 2TotalLevel 1Level 2
Derivative liabilities$3.6 $— $3.6 $5.8 $— $5.8 
NCI$2,780.9 $2,780.9 $— $2,997.3 $2,997.3 $—