Debt - Available Capacity under our Facilities (Details) $ in Millions |
3 Months Ended | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2020
USD ($)
| ||||||||||
MPC 364-day bank revolving credit facility | ||||||||||
Debt Instrument [Line Items] | ||||||||||
Total Capacity | $ 1,000 | |||||||||
Outstanding Borrowings | 0 | |||||||||
Outstanding Letters of Credit | 0 | |||||||||
Available Capacity | $ 1,000 | |||||||||
Weighted Average Interest Rate | 0.00% | |||||||||
MPC bank revolving credit facility | ||||||||||
Debt Instrument [Line Items] | ||||||||||
Total Capacity | $ 5,000 | |||||||||
Outstanding Borrowings | 2,000 | [1] | ||||||||
Outstanding Letters of Credit | 1 | |||||||||
Available Capacity | $ 2,999 | |||||||||
Weighted Average Interest Rate | 1.89% | |||||||||
Borrowings | $ 2,000 | |||||||||
MPC trade receivables securitization facility | ||||||||||
Debt Instrument [Line Items] | ||||||||||
Total Capacity | 750 | |||||||||
Outstanding Borrowings | 0 | [2],[3] | ||||||||
Outstanding Letters of Credit | 0 | |||||||||
Available Capacity | $ 750 | |||||||||
Weighted Average Interest Rate | 0.00% | |||||||||
Borrowings | $ 925 | |||||||||
Repayments | 925 | |||||||||
MPLX bank revolving credit facility | ||||||||||
Debt Instrument [Line Items] | ||||||||||
Total Capacity | 3,500 | |||||||||
Outstanding Borrowings | 750 | [4] | ||||||||
Outstanding Letters of Credit | 0 | |||||||||
Available Capacity | $ 2,750 | |||||||||
Weighted Average Interest Rate | 1.94% | |||||||||
Borrowings | $ 1,325 | |||||||||
Repayments | $ 575 | |||||||||
Weighted average interest rate over time | 2.14% | |||||||||
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