Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Income Taxes [Abstract]

Reconciliation Of Provision For Income Taxes

	Successor						Predecessor
	For the year ended		For the year ended		For the eight months		For the four months
	ended December 31,		December 31,		ended December 31,		ended April 30,
	2023		2022		2021		2021
Consolidated tax provision at federal statutory rate	21.0	%	21.0	%	21.0	%	21.0	%
State income tax provisions, net of federal income tax benefit	13.7		4.8		3.1		0.5
Tax reserve adjustment	-		0.6		0.1		-
Fresh start and reorganization adjustments	-		-		-		(24.9)
Changes in certain deferred tax balances	23.4		(0.5)		(8.2)		-
Nondeductible Executive Compensation under Sec. 162(m)	12.2		2.0		-		-
Sec. 162(f) nondeductible penalties	3.1		0.3		-		-
All other, net	1.9		(1.8)		1.2		0.3
Effective tax rate	75.3	%	26.4	%	17.2	%	(3.1)	%

Components Of Net Deferred Income Tax Liability (Asset)

		December 31,		December 31,
($ in millions)		2023		2022
Deferred income tax liabilities:
Property, plant, and equipment basis differences	$	1,342	$	1,059
Intangibles		184		178
Deferred revenue/expense		(8)		(7)
Other, net		45		47
	$	1,563	$	1,277
Deferred income tax assets:
Pension liability	$	48	$	123
Tax operating loss carryforward		476		306
Employee benefits		83		91
Interest expense deduction
limitation carryforward		260		112
Accrued expenses		80		80
Lease obligations		111		96
Tax credit		32		14
Allowance for doubtful accounts		11		13
Other, net		(1)		25
		1,100		860
Less: Valuation allowance		(180)		(141)
Net deferred income tax asset		920		719
Net deferred income tax liability	$	643	$	558

Schedule Of Components Of Income Tax Expense (Benefit)

	Successor						Predecessor
	For the year ended		For the year ended		For the eight months		For the four months
	December 31,		December 31,		ended December 31,		ended April 30,
($ in millions)	2023		2022		2021		2021
Income tax expense (benefit):
Current:
Federal	$	-	$	-	$	-	$	-
State		10		(7)		8		12
Total Current		10		(7)		8		12
Deferred:
Federal		58		125		(84)		(116)
State		20		40		162		(32)
Total Deferred		78		165		78		(148)
Total income tax expense (benefit)		88		158		86		(136)
Income taxes charged (credited) to equity of Frontier:
Deferred income taxes (benefits) arising from the recognition of additional pension/OPEB liability		6		8		19		-
Total income taxes charged (credited) to equity of Frontier		-		-		-		-
Total income tax expense (benefit)	$	94	$	166	$	105	$	(136)

Changes In The Balance Of Unrecognized Tax Benefits

	Successor						Predecessor
($ in millions)	December 31,		December 31,		December 31,		April 30,
	2023		2022		2021		2021
Unrecognized tax benefits - beginning of period	$	5	$	1	$	1	$	16
Gross decreases - prior period tax positions		(1)		-		-		-
Gross increases (decrease) - current period tax positions		1		4		-		(15)
Unrecognized tax benefits - end of period	$	5	$	5	$	1	$	1