Debt (Tables)

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Schedule of Debt

Debt Balance, Net of Unamortized Issuance Costs (in millions)

	June 30, 2019			December 31, 2018
Total debt	$	5,263		$	5,010
Unamortized issuance costs	(40		)	(46		)
Current maturities	(503		)	(504		)
Debt, Net of Current Maturities and Unamortized Issuance Costs	$	4,720		$	4,460

Schedule of Line of Credit Facilities

Available Capacity Under Credit Facilities (in millions) (a)

	Total Capacity		Amount Borrowed as of June 30, 2019		Outstanding Letters of Credit		Available Capacity as of June 30, 2019		Weighted Average Interest Rate		Expiration
Revolving Credit Facility	$	1,100	$	1,070	$	—	$	30	3.90	%	January 29, 2021
Dropdown Credit Facility	1,000		430		—		570		3.92	%	January 29, 2021
MPC Loan Agreement	500		—		—		500		—	%	December 21, 2023
Total Credit Facilities	$	2,600	$	1,500	$	—	$	1,100

(a)

In conjunction with the MPLX Merger, on July 30, 2019, all outstanding borrowings and unpaid fees on our credit facilities were repaid and the agreements were terminated, including the MPC Loan Agreement.