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Segment and Related Information (Tables) | 12 Months Ended
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Dec. 31, 2017
Segment Reporting [Abstract] |
Segment and Related Information | Income Statement data for the segments and reconciliation to PPL's consolidated results for the years ended December 31 are as follows:
| 2017 |  | 2016 |  | 2015
Operating Revenues from external customers (a) |  |  |  |  |
U.K. Regulated | $ | 2,091 |  |  | $ | 2,207 |  |  | $ | 2,410 |
Kentucky Regulated | 3,156 |  |  | 3,141 |  |  | 3,115 |
Pennsylvania Regulated | 2,195 |  |  | 2,156 |  |  | 2,124 |
Corporate and Other | 5 |  |  | 13 |  |  | 20 |
Total | $ | 7,447 |  |  | $ | 7,517 |  |  | $ | 7,669 |
Depreciation |  |  |  |  |  |  |
U.K. Regulated | $ | 230 |  |  | $ | 233 |  |  | $ | 242 |
Kentucky Regulated | 439 |  |  | 404 |  |  | 382 |
Pennsylvania Regulated | 309 |  |  | 253 |  |  | 214 |
Corporate and Other | 30 |  |  | 36 |  |  | 45 |
Total | $ | 1,008 |  |  | $ | 926 |  |  | $ | 883 |
Amortization (b) |  |  |  |  |  |  |  |
U.K. Regulated | $ | 34 |  |  | $ | 16 |  |  | $ | 6 |
Kentucky Regulated | 24 |  |  | 29 |  |  | 27 |
Pennsylvania Regulated | 33 |  |  | 32 |  |  | 26 |
Corporate and Other | 6 |  |  | 3 |  |  | — |
Total | $ | 97 |  |  | $ | 80 |  |  | $ | 59 |
Unrealized (gains) losses on derivatives and other hedging activities (c) |  |  |  |  |  |
U.K. Regulated | $ | 166 |  |  | $ | 13 |  |  | $ | (88 | )
Kentucky Regulated | 6 |  |  | 6 |  |  | 11 |
Corporate and Other | 6 |  |  | — |  |  | — |
Total | $ | 178 |  |  | $ | 19 |  |  | $ | (77 | )
Interest Expense |  |  |  |  |  |  |  |
U.K. Regulated | $ | 397 |  |  | $ | 402 |  |  | $ | 417 |
Kentucky Regulated | 261 |  |  | 260 |  |  | 232 |
Pennsylvania Regulated | 142 |  |  | 129 |  |  | 130 |
Corporate and Other | 101 |  |  | 97 |  |  | 92 |
Total | $ | 901 |  |  | $ | 888 |  |  | $ | 871 |
Income from Continuing Operations Before Income Taxes |  |  |  |  |  |  |  |
U.K. Regulated | $ | 804 |  |  | $ | 1,479 |  |  | $ | 1,249 |
Kentucky Regulated | 645 |  |  | 640 |  |  | 547 |
Pennsylvania Regulated | 575 |  |  | 550 |  |  | 416 |
Corporate and Other (d) | (112 | ) |  | (119 | ) |  | (144 | )
Total | $ | 1,912 |  |  | $ | 2,550 |  |  | $ | 2,068 |
Income Taxes (e) |  |  |  |  |  |  |  |
U.K. Regulated | $ | 152 |  |  | $ | 233 |  |  | $ | 128 |
Kentucky Regulated | 359 |  |  | 242 |  |  | 221 |
Pennsylvania Regulated | 216 |  |  | 212 |  |  | 164 |
Corporate and Other (d) | 57 |  |  | (39 | ) |  | (48 | )
Total | $ | 784 |  |  | $ | 648 |  |  | $ | 465 |
Deferred income taxes and investment tax credits (f) |  |  |  |  |  |  |  |
U.K. Regulated | $ | 66 |  |  | $ | 31 |  |  | $ | 45 |
Kentucky Regulated | 294 |  |  | 291 |  |  | 236 |
Pennsylvania Regulated | 257 |  |  | 221 |  |  | 220 |
Corporate and Other (d) | 90 |  |  | 17 |  |  | (73 | )
Total | $ | 707 |  |  | $ | 560 |  |  | $ | 428 |
| 2017 |  | 2016 |  | 2015
Net Income |  |  |  |  |  |  |  |
U.K. Regulated | $ | 652 |  |  | $ | 1,246 |  |  | $ | 1,121 |
Kentucky Regulated | 286 |  |  | 398 |  |  | 326 |
Pennsylvania Regulated | 359 |  |  | 338 |  |  | 252 |
Corporate and Other (d) | (169 | ) |  | (80 | ) |  | (96 | )
Discontinued Operations (g) | — |  |  | — |  |  | (921 | )
Total | $ | 1,128 |  |  | $ | 1,902 |  |  | $ | 682 |
(a) | See Note 1 for additional information on Operating Revenues.
(b) | Represents non-cash expense items that include amortization of regulatory assets, debt discounts and premiums, debt issuance costs, emission allowances and RECs.
(c) | Includes unrealized gains and losses from economic activity. See Note 17 for additional information.
(d) | 2015 includes certain costs related to the spinoff of PPL Energy Supply, including deferred income tax expense, transition costs and separation benefits for PPL Services employees. See Note 8 for additional information.
(e) | Represents both current and deferred income taxes, including investment tax credits. See Note 5 for additional information on the impact of the TCJA in 2017.
(f) | Represents a non-cash expense item that is also included in "Income Taxes."
(g) | 2015 includes an $879 million loss on the spinoff of PPL Energy Supply and five months of Supply segment earnings. See Note 8 for additional information on these transactions.
Cash Flow data for the segments and reconciliation to PPL's consolidated results for the years ended December 31 are as follows:
| 2017 |  | 2016 |  | 2015
Expenditures for long-lived assets |  |  |  |  |  |  |  |
U.K. Regulated | $ | 1,015 |  |  | $ | 1,031 |  |  | $ | 1,242 |
Kentucky Regulated | 892 |  |  | 791 |  |  | 1,210 |
Pennsylvania Regulated | 1,254 |  |  | 1,134 |  |  | 1,107 |
Corporate and Other | 10 |  |  | 1 |  |  | 11 |
Total | $ | 3,171 |  |  | $ | 2,957 |  |  | $ | 3,570 |
The following provides Balance Sheet data for the segments and reconciliation to PPL's consolidated results as of:
| As of December 31,
| 2017 |  | 2016
Total Assets |  |  |  |  |
U.K. Regulated (a) | $ | 16,813 |  |  | $ | 14,537 |
Kentucky Regulated | 14,468 |  |  | 14,037 |
Pennsylvania Regulated | 10,082 |  |  | 9,426 |
Corporate and Other (b) | 116 |  |  | 315 |
Total | $ | 41,479 |  |  | $ | 38,315 |
(a) | Includes $12.5 billion and $10.8 billion of net PP&E as of December 31, 2017 and December 31, 2016. WPD is not subject to accounting for the effects of certain types of regulation as prescribed by GAAP.
(b) | Primarily consists of unallocated items, including cash, PP&E and the elimination of inter-segment transactions.
Geographic Data | Geographic data for the years ended December 31 are as follows:
| 2017 |  | 2016 |  | 2015
Revenues from external customers |  |  |  |  |  |  |  |
U.K. | $ | 2,091 |  |  | $ | 2,207 |  |  | $ | 2,410 |
U.S. | 5,356 |  |  | 5,310 |  |  | 5,259 |
Total | $ | 7,447 |  |  | $ | 7,517 |  |  | $ | 7,669 |
Long-lived Assets | Geographic data for the years ended December 31 are as follows:
| As of December 31,
| 2017 |  | 2016
Long-Lived Assets |  |  |  |  |
U.K. | $ | 12,851 |  |  | $ | 11,177 |
U.S. | 20,936 |  |  | 19,595 |
Total | $ | 33,787 |  |  | $ | 30,772 |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8736-108599 + Details
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