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Accumulated Other Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2020

Accumulated Other Comprehensive Income (Loss) [Line Items]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The following table shows the changes in “Accumulated other comprehensive loss” by component during the period December 31, 2019 through June 30, 2020.



(In millions)	Pension Benefits			Other Post-Retirement Benefits			Total
Balance at December 31, 2019⁽¹⁾	$	(14	)	$	(1	)	$	(15	)
Other comprehensive loss - remeasurements⁽²⁾	—			(1		)	(1		)
Balance at June 30, 2020⁽¹⁾	$	(14	)	$	(2	)	$	(16	)

The following table shows the changes in “Accumulated other comprehensive loss” by component during the period December 31, 2018 through June 30, 2019.



(In millions)	Pension Benefits			Other Post-Retirement Benefits			Total
Balance at December 31, 2018⁽¹⁾	$	(14	)	$	(2	)	$	(16	)
Other comprehensive income - remeasurements⁽²⁾	—			1			1
Balance at June 30, 2019⁽¹⁾	$	(14	)	$	(1	)	$	(15	)


(1)	These components of “Accumulated other comprehensive loss” are included in the computation of net periodic benefit cost by LOOP and Explorer and are therefore included on the Consolidated Statements of Income under the caption “Income/(loss) from equity method investments.”

(2)

Components of other comprehensive income/loss - remeasurements relate to actuarial gains and losses as well as amortization of prior service costs. MPLX records an adjustment to “Comprehensive income” in accordance with its ownership interest in LOOP and Explorer.