Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Taxes [Abstract]

Reconciliation Of Provision For Income Taxes

	2020		2019		2018
Consolidated tax provision at federal statutory rate	21.0	%	21.0	%	21.0	%
State income tax provisions, net of federal income
tax benefit	21.7		2.6		1.6
Tax reserve adjustment	(0.7)		-		0.1
Changes in certain deferred tax balances	(35.8)		(2.3)		(3.5)
Interest expense deduction	30.7		-		-
Restructuring cost	(10.0)		-		-
Goodwill impairment	-		(11.8)		(10.4)
Loss on disposal of Northwest Operations	(9.1)		-		-
Share-based payments	(0.2)		(0.1)		(0.5)
Federal research and development credit	(0.5)		-		0.1
Deferred Tax Remeasurement - 2017 Tax Reform	-		-		0.6
All other, net	0.1		-		(0.2)
Effective tax rate	17.2	%	9.4	%	8.8	%

Components Of Net Deferred Income Tax Liability (Asset)

($ in millions)	2020		2019
Deferred income tax liabilities:
Property, plant and equipment basis differences	$	1,873	$	2,184
Deferred revenue/expense		44		65
Other, net		56		56
	$	1,973	$	2,305
Deferred income tax assets:
Pension liability	$	308	$	256
Intangibles		681		665
Tax operating loss carryforward		923		898
Employee benefits		207		184
Interest expense deduction
limitation carryforward		44		238
Accrued expenses		75		37
Lease obligations		83		92
Tax credit		40		39
Allowance for doubtful accounts		35		32
Other, net		17		7
		2,413		2,448
Less: Valuation allowance		(783)		(605)
Net deferred income tax asset		1,630		1,843
Net deferred income tax liability	$	343	$	462

Schedule Of Components Of Income Tax Expense (Benefit)

($ in millions)	2020		2019		2018
Income tax expense (benefit):
Current:
Federal	$	(12)	$	1	$	(1)
State		19		7		6
Total Current		7		8		5
Deferred:
Federal		(84)		(606)		(77)
State		(7)		(13)		10
Total Deferred		(91)		(619)		(67)
Total income tax benefit		(84)		(611)		(62)
Income taxes charged (credited) to equity of Frontier:
Deferred income taxes (benefits) arising from the recognition
of additional pension/OPEB liability		35		32		(31)
Total income taxes charged (credited) to equity of Frontier		35		32		(31)
Total income tax benefit	$	(49)	$	(579)	$	(93)

Changes In The Balance Of Unrecognized Tax Benefits

($ in millions)	2020		2019
Unrecognized tax benefits - beginning of year	$	12	$	11
Gross increases - prior year tax positions		4		-
Gross increases - current year tax positions		-		1
Gross decreases - FIN 48 liability release		-		-
Gross decreases - expired statute of limitations		-		-
Unrecognized tax benefits - end of year	$	16	$	12