v3.24.1.u1
Fair Values - Reported (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Estimate of Fair Value Measurement [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-Term Debt, Fair Value [1] $ 19,206 $ 19,377
Reported Value Measurement [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-Term Debt, Fair Value [1] $ 20,557 $ 20,547
[1] Any amounts outstanding under the MPC Loan Agreement are not included in the table above, as the carrying value approximates fair value. This balance is reflected in Current liabilities - related parties in the Consolidated Balance Sheets.