Debt - MPLX Senior Notes (Details) - MPLX LP
$ in Millions |
Feb. 08, 2018
USD ($)
|
| MPLX 364-day term loan |
|
| Debt Instrument [Line Items] |
|
| Repayments of short-term debt |
$ 4,100
|
| Senior Notes |
|
| Debt Instrument [Line Items] |
|
| Long-term debt, gross |
5,500
|
| Senior Notes | MPLX senior notes, 3.375%, due March 2023 |
|
| Debt Instrument [Line Items] |
|
| Long-term debt, gross |
$ 500
|
| Debt instrument, interest rate |
3.375%
|
| Senior Notes | MPLX senior notes, 4.000%, due March 2028 |
|
| Debt Instrument [Line Items] |
|
| Long-term debt, gross |
$ 1,250
|
| Debt instrument, interest rate |
4.00%
|
| Senior Notes | MPLX senior notes, 4.500%, due April 2038 |
|
| Debt Instrument [Line Items] |
|
| Long-term debt, gross |
$ 1,750
|
| Debt instrument, interest rate |
4.50%
|
| Senior Notes | MPLX senior notes, 4.700%, due April 2048 |
|
| Debt Instrument [Line Items] |
|
| Long-term debt, gross |
$ 1,500
|
| Debt instrument, interest rate |
4.70%
|
| Senior Notes | MPLX senior notes, 4.900%, due April 2058 |
|
| Debt Instrument [Line Items] |
|
| Long-term debt, gross |
$ 500
|
| Debt instrument, interest rate |
4.90%
|