Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Intangible assets at December 31, 2019 and 2018 consist of the following ($ in millions):

	As of December 31,
	2019			2018
Contractual arrangements	$	921		$	921
Non-compete agreements	14			14
Customer relationships	352			353
Trade names	16			16
Technology	9			9
	1,312			1,313
Less: accumulated amortization	(583		)	(524		)
Intangible assets, net	$	729		$	789

Schedule of Future Amortization Expense for Amortizable Intangible Assets

The estimated future amortization expense for amortizable intangible assets to be recognized are ($ in millions):

2020	$	50
2021	45
2022	43
2023	42
2024	37
Thereafter	505
Total	$	722

Schedule of Goodwill

The goodwill balance by reportable segments as of December 31, 2019 are comprised of the following ($ in millions):

	IMTT			Atlantic Aviation			MIC Hawaii			Total
Goodwill acquired in business combinations, net of disposals, at December 31, 2018	$	1,430		$	619		$	123		$	2,172
Accumulated impairment charges	—			(123		)	(3		)	(126		)
Other	(3		)	—			—			(3		)
Balance at December 31, 2018	1,427			496			120			2,043
Other	1			(1		)	—			—
Balance at December 31, 2019	$	1,428		$	495		$	120		$	2,043