Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Taxes [Abstract]

Reconciliation Of Provision For Income Taxes

	2018		2017		2016
Consolidated tax provision at federal statutory rate	21.0	%	35.0	%	35.0	%
State income tax provisions, net of federal income
tax benefit	1.6		1.7		(0.1)
Tax reserve adjustment	0.1		0.1		0.6
Domestic production activities deduction	-		-		(1.9)
Changes in certain deferred tax balances	(3.5)		(0.4)		5.8
Goodwill impairment	(10.4)		(19.1)		-
Share-based payments	(0.5)		-		-
Federal research and development credit	0.1		0.1		1.0
Deferred Tax Remeasurement - 2017 Tax Reform	0.6		26.1		-
All other, net	(0.2)		(0.1)		(0.2)
Effective tax rate	8.8	%	43.4	%	40.2	%

Components Of Net Deferred Income Tax Liability (Asset)

($ in millions)	2018		2017
Deferred income tax liabilities:
Property, plant and equipment basis differences	$	2,182	$	2,022
Intangibles		18		140
Deferred revenue/expense		66		8
Other, net		-		4
	$	2,266	$	2,174
Deferred income tax assets:
Pension liability		209		176
Tax operating loss carryforward		1,027		960
Employee benefits		176		192
Interest expense deduction
limitation carryforward		104		-
Accrued expenses		41		23
Lease obligations		33		39
Tax credit		37		43
Allowance for doubtful accounts		26		7
Other, net		1		2
		1,654		1,442
Less: Valuation allowance		(497)		(407)
Net deferred income tax asset		1,157		1,035
Net deferred income tax liability	$	1,109	$	1,139

Schedule of Components Of Income Tax Expense (Benefit)

($ in millions)	2018		2017		2016
Income tax expense (benefit):
Current:
Federal	$	(1)	$	(4)	$	(52)
State		6		5		7
Total Current		5		1		(45)
Deferred:
Federal		(77)		(1,312)		(145)
State		10		(72)		(60)
Total Deferred		(67)		(1,384)		(205)
Total income tax benefit		(62)		(1,383)		(250)
Income taxes charged (credited) to equity of Frontier:
Utilization of the benefits arising from restricted stock		-		(1)		(5)
Deferred income taxes (benefits) arising from the recognition
of additional pension/OPEB liability		(31)		7		(21)
Total income taxes charged (credited) to equity of Frontier		(31)		6		(26)
Total income tax benefit	$	(93)	$	(1,377)	$	(276)

Changes In The Balance Of Unrecognized Tax Benefits

($ in millions)	2018		2017
Unrecognized tax benefits - beginning of year	$	12	$	16
Gross increases - prior year tax positions		-		-
Gross increases - current year tax positions		-		3
Gross decreases - FIN 48 liability release		-		(7)
Gross decreases - expired statute of limitations		(1)		-
Unrecognized tax benefits - end of year	$	11	$	12