CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) income		$ (8)	$ 9	$ 3	$ 78
Other comprehensive income (loss), net of taxes:
Translation adjustment	[1]	2	2	(1)	2
Other comprehensive income (loss)		2	2	(1)	2
Comprehensive (loss) income		(6)	11	2	80
Less: comprehensive loss attributable to noncontrolling interests		0	(2)	0	(3)
Comprehensive (loss) income attributable to MIC		$ (6)	$ 13	$ 2	$ 83

[1] Translation adjustment is presented net of tax expense of $1 million for the quarter ended June 30, 2020 and both the quarter and six month periods ended June 30, 2019. Tax expense related to translation adjustment for the six months ended June 30, 2020 was insignificant. See Note 10, "Stockholders' Equity", for further discussions.