Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Taxes [Abstract]

Reconciliation Of Provision For Income Taxes

	Successor				Predecessor
	For the year ended		For the eight months		For the four months		For the year ended
	December 31,		ended December 31,		ended April 30,		ended December 31,
	2022		2021		2021		2020
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	4.8		3.1		0.5		21.7
Tax reserve adjustment	0.6		0.1		-		(0.7)
Fresh start and reorganization adjustments	-		-		(24.9)		-
Changes in certain deferred tax balances	(0.5)		(8.2)		-		(35.8)
Interest expense deduction	-		-		-		30.7
Restructuring cost	-		-		0.3		(10.0)
Loss on disposal of Northwest Operations	-		-		-		(9.1)
Share-based payments	-		-		-		(0.2)
Federal research and development credit	(1.2)		(0.4)		-		(0.5)
All other, net	1.7		1.6		-		0.1
Effective tax rate	26.4	%	17.2	%	(3.1)	%	17.2	%

Components Of Net Deferred Income Tax Liability (Asset)

		December 31,		December 31,
($ in millions)		2022		2021
Deferred income tax liabilities:
Property, plant, and equipment basis differences	$	1,059	$	859
Intangibles		178		140
Deferred revenue/expense		(7)		(3)
Other, net		47		46
	$	1,277	$	1,042
Deferred income tax assets:
Pension liability	$	123	$	212
Tax operating loss carryforward		306		185
Employee benefits		91		151
Interest expense deduction
limitation carryforward		112		-
Accrued expenses		80		76
Lease obligations		96		75
Tax credit		14		4
Allowance for doubtful accounts		13		14
Other, net		25		30
		860		747
Less: Valuation allowance		(141)		(92)
Net deferred income tax asset		719		655
Net deferred income tax liability	$	558	$	387

Schedule Of Components Of Income Tax Expense (Benefit)

	Successor				Predecessor
	For the year ended		For the eight months		For the four months		For the year ended
	December 31,		ended December 31,		ended April 30,		December 31,
($ in millions)	2022		2021		2021		2020
Income tax expense (benefit):
Current:
Federal	$	-	$	-	$	-	$	(12)
State		(7)		8		12		19
Total Current		(7)		8		12		7
Deferred:
Federal		125		(84)		(116)		(84)
State		40		162		(32)		(7)
Total Deferred		165		78		(148)		(91)
Total income tax expense (benefit)		158		86		(136)		(84)
Income taxes charged (credited) to equity of Frontier:
Deferred income taxes (benefits) arising from the recognition of additional pension/OPEB liability		8		19		-		35
Total income taxes charged (credited) to equity of Frontier		-		-		-		35
Total income tax expense (benefit)	$	166	$	105	$	(136)	$	(49)

Changes In The Balance Of Unrecognized Tax Benefits

	Successor				Predecessor
($ in millions)	December 31,		December 31,		April 30,		December 31,
	2022		2021		2021		2020
Unrecognized tax benefits - beginning of period	$	1	$	1	$	16	$	12
Gross increases - prior period tax positions		-		-		-		4
Gross increases - current period tax positions		4		-		(15)		-
Unrecognized tax benefits - end of period	$	5	$	1	$	1	$	16