CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income		$ 11	$ 69
Other comprehensive loss, net of taxes:
Translation adjustment	[1]	(3)	0
Other comprehensive loss		(3)	0
Comprehensive income		8	69
Less: comprehensive loss attributable to noncontrolling interests		0	(1)
Comprehensive income attributable to MIC		$ 8	$ 70

[1] Translation adjustment is presented net of tax benefit of $1 million for the quarter ended March 31, 2020. See Note 10, "Stockholders' Equity", for further discussions.