Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Taxes [Abstract]

Reconciliation Of Provision For Income Taxes

	2015		2014		2013
Consolidated tax provision at federal statutory rate	35.0	%	35.0	%	35.0	%
State income tax provisions, net of federal income
tax benefit	8.7		1.6		(2.7)
Noncontrolling interest	-		-		(0.6)
Tax reserve adjustment	(0.3)		6.9		(1.1)
Domestic production activities deduction	-		(8.7)		-
Changes in certain deferred tax balances	0.8		(14.1)		(4.0)
IRS audit adjustments	-		-		3.2
Federal research and development credit	1.5		(3.3)		(3.2)
Non-deductible transaction costs	0.4		1.0		2.0
All other, net	(0.3)		0.3		0.4
Effective tax rate	45.8	%	18.7	%	29.0	%

Components of Net Deferred Income Tax Liability (Asset)

($ in millions)	2015		2014
Deferred income tax liabilities:
Property, plant and equipment basis differences	$	2,401	$	2,451
Intangibles		960		1,076
Other, net		15		24
	$	3,376	$	3,551
Deferred income tax assets:
Pension liability		222		247
Tax operating loss carryforward		295		162
Employee benefits		262		304
Accrued expenses		50		55
Allowance for doubtful accounts		10		16
Other, net		48		39
		887		823
Less: Valuation allowance		(177)		(140)
Net deferred income tax asset		710		683
Net deferred income tax liability	$	2,666	$	2,868

Schedule of Components of Income Tax Expense (Benefit)

($ in millions)	2015		2014		2013
Income tax expense (benefit):
Current:
Federal	$	8	$	98	$	55
State		(6)		10		-
Total Current		2		108		55
Deferred:
Federal		(126)		(34)		13
State		(41)		(44)		(20)
Total Deferred		(167)		(78)		(7)
Total income tax expense (benefit)		(165)		30		48
Income taxes charged (credited) to equity of Frontier:
Utilization of the benefits arising from restricted stock		-		-		2
Deferred income taxes (benefits) arising from the recognition
of additional pension/OPEB liability		36		(90)		132
Total income taxes charged (credited) to equity of Frontier		36		(90)		134
Total income taxes	$	(129)	$	(60)	$	182

Changes in the Balance of Unrecognized Tax Benefits

($ in millions)	2015		2014
Unrecognized tax benefits - beginning of year	$	19	$	9
Gross increases - current year tax positions		2		13
Gross decreases - expired statute of limitations		(2)		(3)
Unrecognized tax benefits - end of year	$	19	$	19