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Risk Management Activities (Tables)
 9 Months Ended
Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value
Risk management assets and liabilities on our derivatives are presented on the Condensed Consolidated Balance Sheets (unaudited) as shown below:
(in millions)September 30, 2020December 31, 2019
Risk Management Assets - Current(1)
Interest rate risk programs$— $— 
Commodity price risk programs13.7 0.6 
Total$13.7 $0.6 
Risk Management Assets - Noncurrent(2)
Interest rate risk programs$— $— 
Commodity price risk programs6.7 3.8 
Total$6.7 $3.8 
Risk Management Liabilities - Current
Interest rate risk programs$92.1 $— 
Commodity price risk programs4.8 12.6 
Total$96.9 $12.6 
Risk Management Liabilities - Noncurrent
Interest rate risk programs$123.3 $76.2 
Commodity price risk programs46.2 57.8 
Total$169.5 $134.0 
(1)Presented in "Prepayments and other" on the Condensed Consolidated Balance Sheets (unaudited).
(2)Presented in "Deferred charges and other" on the Condensed Consolidated Balance Sheets (unaudited).