Financial Instruments and Derivatives (Balance Sheet) (Details) bbl in Millions, MMBTU in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2025 MMBTU bbl	Dec. 31, 2024 MMBTU bbl
Crude oil (barrels) | Long
Net notional long / short position of derivative instruments bbl	35	13
Petroleum products (barrels) | Short
Net notional long / short position of derivative instruments bbl	28	32
Natural gas (MMBTUs) | Short
Net notional long / short position of derivative instruments MMBtus | MMBTU	702	675