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Income Taxes (Tables)
9 Months Ended
Sep. 30, 2015
Income Taxes [Line Items]  
Reconciliation of Income Tax Expense Derived From Statutory Tax Rate

Reconciliations of income taxes for the periods ended September 30 are as follows.

(PPL)
Three MonthsNine Months
2015201420152014
Federal income tax on Income from Continuing Operations Before
Income Taxes at statutory tax rate - 35%$189$214$571$547
Increase (decrease) due to:
State income taxes, net of federal income tax benefit15134428
Valuation allowance adjustments (a)3849
Impact of lower U.K. income tax rates(40)(48)(138)(124)
U.S. income tax on foreign earnings - net of foreign tax credit (b)26(1)47
Federal and state tax reserve adjustments (c)(9)(21)
Foreign income tax return adjustments (4)
Amortization of investment tax credit(1)1(3)(3)
Depreciation not normalized (1)(3)(4)(7)
Intercompany interest on U.K. financing entities(4)(15)(4)
Other(5)(5)(5)1
Total increase (decrease)(45)(13)(139)(13)
Total income taxes $144$201$432$534

(a) As a result of the spinoff announcement, PPL recorded deferred income tax expense during the three and nine months ended September 30, 2014 to adjust valuation allowances on deferred tax assets primarily for state net operating loss carryforwards that were previously supported by the future earnings of PPL Energy Supply. See Note 8 for additional information on the spinoff.

(b) During the three and nine months ended September 30, 2015, PPL recorded lower income tax expense due to a decrease in taxable dividends.

(c) During the three and nine months ended September 30, 2015, PPL recorded a $9 million tax benefit related to a planned amendment of a prior period tax return.

During the nine months ended September 30, 2015, PPL recorded a $12 million tax benefit to adjust the settled refund amount approved by the Joint Committee of Taxation for the open audit years 1998-2011.

Unrecognized Tax Benefits

Changes to unrecognized tax benefits for the periods ended September 30 are as follows.

Three MonthsNine Months
2015201420152014
PPL
Beginning of period$5$21$20$22
Additions based on tax positions of prior years1
Reductions based on tax positions of prior years(2)
Settlements(15)
End of period $5$21$5$21
PPL Electric Utilities Corp [Member]  
Income Taxes [Line Items]  
Reconciliation of Income Tax Expense Derived From Statutory Tax Rate

Reconciliations of income taxes for the periods ended September 30 are as follows.

(PPL Electric)
Three MonthsNine Months
2015201420152014
Federal income tax on Income Before Income Taxes at statutory
tax rate - 35%$32$33$112$110
Increase (decrease) due to:
State income taxes, net of federal income tax benefit752117
Depreciation not normalized(1)(2)(3)(5)
Other(3)1(1)
Total increase (decrease)341811
Total income taxes$35$37$130$121
LG And E And KU Energy LLC [Member]  
Income Taxes [Line Items]  
Reconciliation of Income Tax Expense Derived From Statutory Tax Rate

Reconciliations of income taxes for the periods ended September 30 are as follows.

(LKE)
Three MonthsNine Months
2015201420152014
Federal income tax on Income from Continuing Operations Before
Income Taxes at statutory tax rate - 35%$68$51$172$153
Increase (decrease) due to:
State income taxes, net of federal income tax benefit761816
Amortization of investment tax credit(1)(1)(2)(3)
Valuation allowance adjustment (a)8
Other(1)(1)(2)(1)
Total increase (decrease)542212
Total income taxes$73$55$194$165

(a) Represents a valuation allowance against tax credits expiring in 2016 and 2017 that are more likely than not to expire before being utilized.

Louisville Gas And Electric Co [Member]  
Income Taxes [Line Items]  
Reconciliation of Income Tax Expense Derived From Statutory Tax Rate

Reconciliations of income taxes for the periods ended September 30 are as follows.

(LG&E)
Three MonthsNine Months
2015201420152014
Federal income tax on Income Before Income Taxes at statutory
tax rate - 35%$33$26$83$74
Increase (decrease) due to:
State income taxes, net of federal income tax benefit4398
Other(1)(2)(1)(4)
Total increase (decrease)3184
Total income taxes$36$27$91$78
Kentucky Utilities Co [Member]  
Income Taxes [Line Items]  
Reconciliation of Income Tax Expense Derived From Statutory Tax Rate

Reconciliations of income taxes for the periods ended September 30 are as follows.

(KU)
Three MonthsNine Months
2015201420152014
Federal income tax on Income Before Income Taxes at statutory
tax rate - 35%$41$32$106$98
Increase (decrease) due to:
State income taxes, net of federal income tax benefit431110
Other(1)(1)(2)(2)
Total increase (decrease)3298
Total income taxes$44$34$115$106