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Consolidated Balance Sheets - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Assets    
Cash and cash equivalents $ 2,534 $ 1,519
Receivables, net 858 718
Inventories 186 180
Other current assets 33 29
Total current assets 4,521 3,276
Equity method investments 4,751 4,531
Property, plant and equipment, net 19,147 19,154
Intangibles, net 529 518
Goodwill 7,645 7,645
Right of use assets, net 286 273
Other noncurrent assets 998 994
Total assets 38,972 37,511
Liabilities    
Accounts payable 145 147
Accrued liabilities 269 295
Accrued property, plant and equipment 211 208
Long-term debt due within one year 2,697 1,693
Accrued interest payable 203 244
Operating lease liabilities 47 45
Total current liabilities 4,169 3,235
Long-term deferred revenue 317 317
Long-term debt 19,721 19,255
Deferred income taxes 18 18
Long-term operating lease liabilities 227 217
Total liabilities 24,904 23,501
Commitments and contingencies (see Note 16)
Series A Preferred Units 0 203
Equity    
Accumulated other comprehensive income (loss) 5 (3)
Total MPLX LP partners’ capital 13,838 13,576
Noncontrolling interests 230 231
Total equity 14,068 13,807
Total liabilities, preferred units and equity 38,972 37,511
Related Party [Member]    
Assets    
Receivables, net 664 620
Current assets - related parties 910 830
Other current assets 0 1
Right of use assets, net 224 226
Noncurrent assets - related parties 1,095 1,120
Liabilities    
Operating lease liabilities 1 2
Other current liabilities 402 396
Long-term deferred revenue 102 110
Long-term liabilities - related parties 324 334
Equity    
Limited Partners' Capital Account 4,361 4,257
Nonrelated Party [Member]    
Liabilities    
Other current liabilities 195 207
Long-term deferred revenue 315 315
Long-term liabilities - related parties 128 125
Equity    
Limited Partners' Capital Account $ 9,472 $ 9,322