XML 63 R52.htm IDEA: XBRL DOCUMENT v3.25.1
Risk Management Activities (Schedule of Derivative Instruments in Statement of Financial Position, Fair Value) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Risk Management Assets Current    
Derivatives, Fair Value [Line Items]    
Risk management assets $ 31.5 $ 9.1
Risk Management Assets Noncurrent    
Derivatives, Fair Value [Line Items]    
Risk management assets 20.2 17.9
Risk Management Liabilities Current    
Derivatives, Fair Value [Line Items]    
Risk management liabilities 2.2 2.3
Risk Management Liabilities Noncurrent    
Derivatives, Fair Value [Line Items]    
Risk management liabilities 1.4 1.2
Commodity Price Risk Programs | Risk Management Assets Current    
Derivatives, Fair Value [Line Items]    
Risk management assets 31.5 9.1
Commodity Price Risk Programs | Risk Management Assets Noncurrent    
Derivatives, Fair Value [Line Items]    
Risk management assets 20.2 17.9
Commodity Price Risk Programs | Risk Management Liabilities Current    
Derivatives, Fair Value [Line Items]    
Risk management liabilities 2.2 2.3
Commodity Price Risk Programs | Risk Management Liabilities Noncurrent    
Derivatives, Fair Value [Line Items]    
Risk management liabilities $ 1.4 $ 1.2