v3.20.4
Fair Value Measurements (Details) - USD ($)
$ in Millions
 3 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Deferred Compensation Investment $ 15.0 $ 12.8
Derivative Asset 25.6 14.7
Equity Securities 40.8 27.9
Assets, Fair Value Disclosure 81.4 55.4
Deferred Compensation Liabilities 33.1 29.7
Derivative Liability 493.4 543.1
Other Liabilities, Fair Value Disclosure 526.5 572.8
(Gain) loss on assets held for sale (0.6)  
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Deferred Compensation Investment 15.0 12.8
Derivative Asset 0.0 0.0
Equity Securities 40.8 27.9
Assets, Fair Value Disclosure 55.8 40.7
Deferred Compensation Liabilities 0.0 0.0
Derivative Liability 0.0 0.0
Other Liabilities, Fair Value Disclosure 0.0 0.0
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Deferred Compensation Investment 0.0 0.0
Derivative Asset 25.6 14.7
Equity Securities 0.0 0.0
Assets, Fair Value Disclosure 25.6 14.7
Deferred Compensation Liabilities 33.1 29.7
Derivative Liability 493.4 543.1
Other Liabilities, Fair Value Disclosure 526.5 572.8
Debt, Fair Value 7,331.5 7,277.8
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets Held for Sale, Fair Value 1.4 $ 7.3
(Gain) loss on assets held for sale (0.6)  
Proceeds from Sale of Assets and Liabilities Held for Sale $ (6.5)