Derivatives and Risk Management Activities - Commodity Price Risk Hedging (Details) bbl in Millions, Bcf in Billions	6 Months Ended
	Jun. 30, 2022 TWh bbl Bcf
Crude oil purchases | Long
Commodity Price Risk Hedging:
Derivative position notional amount (in barrels or Bcf)	9.3
Time spread on hedging anticipated crude oil lease gathering purchases | Short
Commodity Price Risk Hedging:
Derivative position notional amount (in barrels or Bcf)	6.6
Crude oil basis spread position
Commodity Price Risk Hedging:
Derivative position notional amount (in barrels or Bcf)	2.1
Anticipated net sales of crude oil and NGL inventory | Short
Commodity Price Risk Hedging:
Derivative position notional amount (in barrels or Bcf)	12.7
Natural gas purchases for processing and operational needs | Long
Commodity Price Risk Hedging:
Derivative position notional amount (in barrels or Bcf) | Bcf	81.5
Propane contracts related to subsequent sale of products | Short
Commodity Price Risk Hedging:
Derivative position notional amount (in barrels or Bcf)	16.0
Butane contracts related to subsequent sale of products | Short
Commodity Price Risk Hedging:
Derivative position notional amount (in barrels or Bcf)	3.3
Condensate sales contracts related to subsequent sale of products | Short
Commodity Price Risk Hedging:
Derivative position notional amount (in barrels or Bcf)	1.1
Fuel gas requirements | Long
Commodity Price Risk Hedging:
Derivative position notional amount (in barrels or Bcf) | Bcf	10.9
Power supply requirements | Long
Commodity Price Risk Hedging:
Derivative position notional amount (in Terawatt hours) | TWh	0.6