Master Limited Partnerships (Tables)

6 Months Ended

Jun. 30, 2019

Noncontrolling Interest [Abstract]

Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net

As a result of equity transactions of MPLX and ANDX, we are required to adjust non-controlling interest and additional paid-in capital. Changes in MPC’s additional paid-in capital resulting from changes in its ownership interests in MPLX and ANDX were as follows:

	Six Months Ended  June 30,
(In millions)	2019			2018
Increase due to the issuance of MPLX common units and general partner units to MPC	$	—		$	1,114
Increase due to GP/IDR Exchange	—			1,808
Increase due to the issuance of MPLX & ANDX common units	7			5
Increase in MPC's additional paid-in capital	7			2,927
Tax impact	(2		)	(546		)
Increase in MPC's additional paid-in capital, net of tax	$	5		$	2,381