Related Party Agreements and Transactions (Tables)

9 Months Ended

Sep. 30, 2020

Related Party Transactions [Abstract]

Other Long-term Debt, Noncurrent

Activity on the MPC Loan Agreement was as follows:

(In millions)	Nine Months Ended September 30, 2020			Year Ended December 31, 2019
Borrowings	$	4,870		$	8,540
Average interest rate of borrowings	2.380		%	3.441		%
Repayments	$	5,464		$	7,946
Outstanding balance at end of period(1)	$	—		$	594

(1) Included in “Current liabilities - related parties” on the Consolidated Balance Sheets.

Prior to the Merger, ANDX was also party to a loan agreement with MPC (“ANDX-MPC Loan Agreement”). This facility was entered into on December 21, 2018, with a borrowing capacity of $500 million. In connection with the Merger, on July 31, 2019, MPLX repaid the entire outstanding balance and terminated the ANDX-MPC Loan Agreement. Activity on the ANDX-MPC Loan Agreement prior to the Merger was as follows:

(In millions)	Year Ended December 31, 2019
Borrowings	$	773
Average interest rate of borrowings	4.249		%
Repayments	$	773
Outstanding balance at end of period	$	—

Schedule of Sales to Related Parties

Revenue received from related parties included on the Consolidated Statements of Income was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Service revenues - related parties
MPC	$	908	$	899	$	2,692	$	2,549
Other	1		—		2		—
Total Service revenue - related parties	909		899		2,694		2,549
Rental income - related parties
MPC	241		293		712		904
Product sales - related parties(1)
MPC	37		32		100		109
Other income - related parties
MPC	48		14		144		34
Other	15		17		46		50
Total Other income - related parties	$	63	$	31	$	190	$	84

(1) There were additional product sales to MPC that net to zero within the consolidated financial statements as the transactions are recorded net due to the terms of the agreements under which such product was sold. For the three and nine months ended September 30, 2020, these sales totaled $107 million and $332 million, respectively. For the three and nine months ended September 30, 2019, these sales totaled $301 million and $819 million, respectively.

Schedule of Employee Services Expenses from Related Parties

Expenses incurred from MPC under the omnibus and employee services agreements as well as other purchases from MPC included on the Consolidated Statements of Income are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Rental cost of sales - related parties
MPC	$	32	$	45	$	119	$	124
Purchases - related parties
MPC	293		297		840		878
Other	4		6		13		16
Total Purchase - related parties	297		303		853		894
General and administrative expenses
MPC	63		59		195		174
Restructuring expenses
MPC	$	36	$	—	$	36	$	—

Schedule of Related Party Transactions [Table Text Block]

(In millions)	September 30, 2020		December 31, 2019
Current assets - related parties
Receivables - MPC	$	543	$	621
Receivables - Other	7		22
Prepaid - MPC	11		9
Other - MPC	1		—
Lease Receivables - MPC	29		4
Total	591		656
Noncurrent assets - related parties
Long-term receivables - MPC	32		21
Right of use assets - MPC	231		232
Long-term lease receivables - MPC	390		43
Unguaranteed residual asset - MPC	22		7
Total	675		303
Current liabilities - related parties
Payables - MPC	247		911
Payables - Other	42		37
Operating lease liabilities - MPC	1		1
Deferred revenue - Minimum volume deficiencies - MPC	54		42
Deferred revenue - Project reimbursements - MPC	19		16
Deferred revenue - Project reimbursements - Other	1		1
Total	364		1,008
Long-term liabilities - related parties
Long-term operating lease liabilities - MPC	230		230
Long-term deferred revenue - Project reimbursements - MPC	45		53
Long-term deferred revenue - Project reimbursements - Other	6		7
Total	$	281	$	290