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Consolidated Balance Sheets - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Assets    
Cash and cash equivalents $ 385 $ 1,048
Receivables, net 752 823
Inventories 163 159
Other current assets 36 30
Total current assets 2,139 2,808
Equity method investments 4,343 3,743
Property, plant and equipment, net 19,299 19,264
Intangibles, net 618 654
Goodwill 7,645 7,645
Right of use assets, net 290 264
Other noncurrent assets 976 990
Total assets 36,461 36,529
Liabilities    
Accounts payable 132 153
Accrued liabilities 248 300
Accrued property, plant and equipment 166 216
Long-term debt due within one year 1,639 1,135
Accrued interest payable 187 242
Operating lease liabilities 50 45
Total current liabilities 2,960 2,624
Long-term deferred revenue 349 347
Long-term debt 18,805 19,296
Deferred income taxes 16 16
Long-term operating lease liabilities 231 211
Other long-term liabilities 133 126
Total liabilities 22,814 22,945
Commitments and contingencies (see Note 16)
Temporary Equity, Carrying Amount, Attributable to Parent 561 895
Equity    
Accumulated other comprehensive loss (3) (4)
Total MPLX LP partners’ capital 12,852 12,454
Noncontrolling interests 234 235
Total equity 13,086 12,689
Total liabilities, preferred units and equity 36,461 36,529
Related Party [Member]    
Assets    
Receivables, net 610 587
Current assets - related parties 803 748
Other current assets 8 7
Right of use assets, net 227 227
Noncurrent assets - related parties 1,151 1,161
Liabilities    
Operating lease liabilities 1 1
Other current liabilities 351 360
Long-term deferred revenue 95 99
Long-term liabilities - related parties 320 325
Equity    
Limited Partners' Capital Account 3,858 3,758
Nonrelated Party [Member]    
Liabilities    
Other current liabilities 187 173
Long-term deferred revenue 346 344
Equity    
Limited Partners' Capital Account $ 8,997 $ 8,700