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Long-Term Debt (Tables)
 3 Months Ended
Mar. 31, 2020
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt
At March 31, 2020 and December 31, 2019, the Company’s consolidated long-term debt balance comprised of the following ($ in millions):
 
March 31,
2020
 
December 31, 2019
IMTT
$
1,109

 
$
1,109

Atlantic Aviation
1,287

 
1,015

MIC Hawaii
194

 
195

MIC Corporate
988

 
388

Total
3,578

 
2,707

Current portion
(286
)
 
(12
)
Long-term portion
3,292

 
2,695

Unamortized deferred financing costs(1)
(39
)
 
(41
)
Long-term portion less unamortized debt discount and deferred financing costs
$
3,253

 
$
2,654

___________
(1)
The weighted average remaining life of the deferred financing costs at March 31, 2020 was 5.1 years.
Convertible Debt
The 2.00% Convertible Senior Notes consisted of the following ($ in millions):
 
March 31,
2020
 
December 31, 2019
Liability Component:
 
 
 
Principal
$
403

 
$
403

Unamortized debt discount
(14
)
 
(15
)
Long-term debt, net of unamortized debt discount
389

 
388

Unamortized deferred financing costs
(6
)
 
(6
)
Net carrying amount
$
383

 
$
382

Equity Component
$
27

 
$
27