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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Cash Flows from Operating Activities |  |  |  |
Net income |  | $ 1,827 | $ 1,128 | $ 1,902
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |
Depreciation |  | 1,094 | 1,008 | 926
Amortization |  | 78 | 97 | 80
Defined benefit plans - expense (income) |  | (192) | (95) | (40)
Deferred income taxes and investment tax credits |  | 355 | 707 | 560
Unrealized (gains) losses on derivatives, and other hedging activities |  | (186) | 178 | 19
Stock compensation expense |  | 26 | 38 | 28
Other |  | (3) | (9) | (12)
Change in current assets and current liabilities |  |  |  |
Accounts receivable |  | 28 | (33) | (15)
Accounts payable |  | 78 | (10) | 57
Unbilled Revenues |  | 41 | (48) | (63)
Fuel, materials and supplies |  | 17 | 40 | (3)
Customer Deposits |  | (35) | 16 | (50)
Regulatory assets and liabilities, net |  | 13 | (12) | (59)
Other Current Liabilities |  | (22) | 6 | (6)
Other |  | 33 | (5) | 55
Other operating activities |  |  |  |
Defined benefit plans - funding |  | (361) | (565) | (427)
Proceeds from transfer of excess benefit plan funds |  | 65 | 0 | 0
Other assets |  | (75) | 32 | 33
Other liabilities |  | 40 | (12) | (95)
Net cash provided by operating activities |  | 2,821 | 2,461 | 2,890
Cash Flows from Investing Activities |  |  |  |
Expenditures for property, plant and equipment |  | (3,238) | (3,133) | (2,920)
Purchase of available-for-sale securities |  | (65) | 0 | 0
Other investing activities |  | (58) | (28) | (6)
Net cash provided by (used in) investing activities |  | (3,361) | (3,161) | (2,926)
Cash Flows from Financing Activities |  |  |  |
Issuance of long-term debt |  | 1,059 | 1,515 | 1,342
Retirement of long-term debt |  | (277) | (168) | (930)
Issuance of common stock |  | 698 | 453 | 144
Payment of common stock dividends |  | (1,133) | (1,072) | (1,030)
Net increase (decrease) in short-term debt |  | 363 | 115 | 29
Other financing activities |  | (20) | (19) | 6
Net cash provided by (used in) financing activities |  | 690 | 824 | (439)
Effect of Exchange Rates on Cash, Cash Equivalents and Restricted Cash |  | (18) | 15 | (28)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash |  | 132 | 139 | (503)
Cash and Cash Equivalents at Beginning of Period |  | 485 |  |
Cash and Cash Equivalents at End of Period |  | 621 | 485 |
Cash, Cash Equivalents and Restricted Cash at Beginning of Period |  | 511 | 372 | 875
Cash, Cash Equivalents and Restricted Cash at End of Period |  | 643 | 511 | 372
Supplemental Disclosures of Cash Flow Information: |  |  |  |
Interest - net of amount capitalized |  | 910 | 845 | 854
Income taxes - net |  | 127 | 65 | 70
Accrued expenditures for property, plant and equipment at December 31, |  | 345 | 360 | 281
Accrued expenditures for intangible assets at December 31, |  | 64 | 68 | 117
PPL Electric Utilities Corp [Member] |  |  |  |
Cash Flows from Operating Activities |  |  |  |
Net income | [1] | 430 | 362 | 340
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |
Depreciation |  | 352 | 309 | 253
Amortization |  | 22 | 33 | 32
Defined benefit plans - expense (income) |  | 3 | 12 | 11
Deferred income taxes and investment tax credits |  | 125 | 258 | 221
Other |  | (4) | (8) | (13)
Change in current assets and current liabilities |  |  |  |
Accounts receivable |  | 47 | (57) | 16
Accounts payable |  | 10 | 3 | 58
Unbilled Revenues |  | 7 | (13) | (23)
Prepayments |  | 1 | 3 | 43
Taxes payable |  | 4 | (4) | (12)
Regulatory assets and liabilities, net |  | (19) | (5) | (62)
Other |  | 10 | (1) | (7)
Other operating activities |  |  |  |
Defined benefit plans - funding |  | (28) | (24) | 0
Other assets |  | (37) | 15 | 19
Other liabilities |  | 55 | (3) | (4)
Net cash provided by operating activities |  | 978 | 880 | 872
Cash Flows from Investing Activities |  |  |  |
Expenditures for property, plant and equipment |  | (1,192) | (1,244) | (1,125)
Expenditures for intangible assets |  | (4) | (10) | (9)
Other investing activities |  | 3 | 2 | 4
Net cash provided by (used in) investing activities |  | (1,193) | (1,252) | (1,130)
Cash Flows from Financing Activities |  |  |  |
Issuance of long-term debt |  | 398 | 470 | 224
Retirement of long-term debt |  | 0 | 0 | (224)
Contributions from parent |  | 429 | 575 | 220
Payment of common stock dividends to parent |  | (390) | (336) | (288)
Net increase (decrease) in short-term debt |  | 0 | (295) | 295
Other financing activities |  | (4) | (6) | (3)
Net cash provided by (used in) financing activities |  | 433 | 408 | 224
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash |  | 218 | 36 | (34)
Cash and Cash Equivalents at Beginning of Period |  | 49 |  |
Cash and Cash Equivalents at End of Period |  | 267 | 49 |
Cash, Cash Equivalents and Restricted Cash at Beginning of Period |  | 51 | 15 | 49
Cash, Cash Equivalents and Restricted Cash at End of Period |  | 269 | 51 | 15
Supplemental Disclosures of Cash Flow Information: |  |  |  |
Interest - net of amount capitalized |  | 144 | 128 | 115
Income taxes - net |  | (20) | 4 | (48)
Accrued expenditures for property, plant and equipment at December 31, |  | 158 | 133 | 126
LG And E And KU Energy LLC [Member] |  |  |  |
Cash Flows from Operating Activities |  |  |  |
Net income |  | 445 | 316 | 429
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |
Depreciation |  | 475 | 439 | 404
Amortization |  | 18 | 24 | 29
Defined benefit plans - expense (income) |  | 17 | 25 | 27
Deferred income taxes and investment tax credits |  | 94 | 294 | 291
Other |  | (4) | 0 | 0
Change in current assets and current liabilities |  |  |  |
Accounts receivable |  | 1 | (12) | (31)
Accounts payable |  | 39 | (9) | 24
Unbilled Revenues |  | 34 | (33) | (23)
Accounts payable to affiliates |  | 2 | 2 | 1
Fuel, materials and supplies |  | 7 | 45 | 2
Taxes payable |  | (3) | 27 | (7)
Regulatory assets and liabilities, net |  | 32 | (7) | 1
Other |  | (24) | 41 | (6)
Other operating activities |  |  |  |
Defined benefit plans - funding |  | (131) | (35) | (85)
Settlement of interest rate swaps |  | 0 | 0 | (9)
Expenditures for asset retirement obligations |  | (72) | (34) | (26)
Other assets |  | (24) | 8 | 2
Other liabilities |  | 9 | 8 | 4
Net cash provided by operating activities |  | 915 | 1,099 | 1,027
Cash Flows from Investing Activities |  |  |  |
Expenditures for property, plant and equipment |  | (1,117) | (892) | (791)
Other investing activities |  | 1 | 4 | 1
Net cash provided by (used in) investing activities |  | (1,116) | (888) | (790)
Cash Flows from Financing Activities |  |  |  |
Issuance of long-term debt |  | 118 | 160 | 221
Issuance of long-term note with affiliate |  | 250 | 0 | 0
Retirement of long-term debt |  | (27) | (70) | (246)
Contributions from member |  | 0 | 0 | 61
Distributions to member |  | (302) | (402) | (316)
Net increase (decrease) in notes payable to affiliates |  | (112) | 62 | 109
Net increase (decrease) in short-term debt |  | 270 | 59 | (80)
Other financing activities |  | (2) | (3) | (3)
Net cash provided by (used in) financing activities |  | 195 | (194) | (254)
Net Increase (Decrease) in Cash and Cash Equivalents |  | (6) | 17 | (17)
Cash and Cash Equivalents at Beginning of Period |  | 30 | 13 | 30
Cash and Cash Equivalents at End of Period |  | 24 | 30 | 13
Supplemental Disclosures of Cash Flow Information: |  |  |  |
Interest - net of amount capitalized |  | 218 | 204 | 198
Income taxes - net |  | 46 | 48 | (24)
Accrued expenditures for property, plant and equipment at December 31, |  | 150 | 174 | 104
Louisville Gas And Electric Co [Member] |  |  |  |
Cash Flows from Operating Activities |  |  |  |
Net income | [2] | 233 | 213 | 203
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |
Depreciation |  | 195 | 183 | 170
Amortization |  | 14 | 14 | 14
Defined benefit plans - expense (income) |  | 3 | 7 | 8
Deferred income taxes and investment tax credits |  | 60 | 126 | 147
Other |  | 0 | 1 | 0
Change in current assets and current liabilities |  |  |  |
Accounts receivable |  | 4 | (7) | (22)
Accounts receivable from affiliates |  | 0 | 4 | (16)
Accounts payable |  | 10 | (7) | 31
Unbilled Revenues |  | 14 | (16) | (8)
Accounts payable to affiliates |  | 1 | (4) | 1
Fuel, materials and supplies |  | 4 | 12 | 8
Taxes payable |  | 1 | (15) | 20
Regulatory assets and liabilities, net |  | 5 | (5) | (1)
Other |  | (10) | 16 | (2)
Other operating activities |  |  |  |
Defined benefit plans - funding |  | (61) | (4) | (46)
Settlement of interest rate swaps |  | 0 | 0 | (9)
Expenditures for asset retirement obligations |  | (22) | (15) | (18)
Other assets |  | (12) | 5 | 0
Other liabilities |  | 4 | 4 | 2
Net cash provided by operating activities |  | 443 | 512 | 482
Cash Flows from Investing Activities |  |  |  |
Expenditures for property, plant and equipment |  | (554) | (458) | (439)
Net cash provided by (used in) investing activities |  | (554) | (458) | (439)
Cash Flows from Financing Activities |  |  |  |
Issuance of long-term debt |  | 100 | 160 | 125
Retirement of long-term debt |  | 0 | (70) | (150)
Contributions from parent |  | 83 | 30 | 71
Payment of common stock dividends to parent |  | (156) | (192) | (128)
Net increase (decrease) in short-term debt |  | 80 | 30 | 27
Other financing activities |  | (1) | (2) | (2)
Net cash provided by (used in) financing activities |  | 106 | (44) | (57)
Net Increase (Decrease) in Cash and Cash Equivalents |  | (5) | 10 | (14)
Cash and Cash Equivalents at Beginning of Period |  | 15 | 5 | 19
Cash and Cash Equivalents at End of Period |  | 10 | 15 | 5
Supplemental Disclosures of Cash Flow Information: |  |  |  |
Interest - net of amount capitalized |  | 71 | 65 | 65
Income taxes - net |  | 7 | 22 | (43)
Accrued expenditures for property, plant and equipment at December 31, |  | 61 | 92 | 56
Kentucky Utilities Co [Member] |  |  |  |
Cash Flows from Operating Activities |  |  |  |
Net income | [3] | 286 | 259 | 265
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |
Depreciation |  | 279 | 255 | 234
Amortization |  | 3 | 9 | 14
Defined benefit plans - expense (income) |  | 0 | 4 | 5
Deferred income taxes and investment tax credits |  | 48 | 152 | 126
Other |  | (4) | 0 | (1)
Change in current assets and current liabilities |  |  |  |
Accounts receivable |  | (4) | (5) | (8)
Accounts payable |  | 29 | 0 | (10)
Unbilled Revenues |  | 20 | (17) | (15)
Accounts payable to affiliates |  | (3) | (6) | 15
Fuel, materials and supplies |  | 3 | 32 | (6)
Taxes payable |  | 5 | (26) | 25
Regulatory assets and liabilities, net |  | 27 | (2) | 2
Other |  | (3) | 9 | (4)
Other operating activities |  |  |  |
Defined benefit plans - funding |  | (54) | (23) | (20)
Expenditures for asset retirement obligations |  | (50) | (19) | (8)
Other assets |  | (12) | 3 | (6)
Other liabilities |  | 11 | 9 | (2)
Net cash provided by operating activities |  | 581 | 634 | 606
Cash Flows from Investing Activities |  |  |  |
Expenditures for property, plant and equipment |  | (562) | (432) | (350)
Other investing activities |  | 1 | 4 | 1
Net cash provided by (used in) investing activities |  | (561) | (428) | (349)
Cash Flows from Financing Activities |  |  |  |
Issuance of long-term debt |  | 18 | 0 | 96
Retirement of long-term debt |  | (27) | 0 | (96)
Contributions from parent |  | 45 | 0 | 20
Payment of common stock dividends to parent |  | (246) | (226) | (248)
Net increase (decrease) in short-term debt |  | 190 | 29 | (32)
Other financing activities |  | (1) | (1) | (1)
Net cash provided by (used in) financing activities |  | (21) | (198) | (261)
Net Increase (Decrease) in Cash and Cash Equivalents |  | (1) | 8 | (4)
Cash and Cash Equivalents at Beginning of Period |  | 15 | 7 | 11
Cash and Cash Equivalents at End of Period |  | 14 | 15 | 7
Supplemental Disclosures of Cash Flow Information: |  |  |  |
Interest - net of amount capitalized |  | 95 | 92 | 89
Income taxes - net |  | 25 | 34 | 13
Accrued expenditures for property, plant and equipment at December 31, |  | $ 88 | $ 82 | $ 47
[1] | Net income equals comprehensive income.
[2] | Net income equals comprehensive income.
[3] | Net income approximates comprehensive income.

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- Definition Amount of cash inflow (outflow) from financing activities classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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- Definition The cash inflow from a long-term borrowing made from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Proceeds from Advances from Affiliates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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- Definition The net cash inflow or outflow for borrowing having initial term of repayment within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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