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Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Millions | Total | Preferred Stock [Member] | Common Stockholders' Equity [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Net Unrealized (Losses) Gains on Available for Sale Securities [Member] | Pension and OPEB Adjustments [Member] | Noncontrolling Interest [Member] | Duke Energy Carolinas [Member] | Duke Energy Carolinas [Member] Member's Equity [Member] | Duke Energy Carolinas [Member] Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Progress Energy [Member] | Progress Energy [Member] Common Stockholders' Equity [Member] | Progress Energy [Member] Additional Paid-in Capital [Member] | Progress Energy [Member] Retained Earnings [Member] | Progress Energy [Member] Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Progress Energy [Member] Net Unrealized (Losses) Gains on Available for Sale Securities [Member] | Progress Energy [Member] Pension and OPEB Adjustments [Member] | Progress Energy [Member] Noncontrolling Interest [Member] | Duke Energy Progress [Member] | Duke Energy Florida [Member] | Duke Energy Florida [Member] Member's Equity [Member] | Duke Energy Florida [Member] Net Unrealized (Losses) Gains on Available for Sale Securities [Member] | Duke Energy Ohio [Member] | Duke Energy Ohio [Member] Common Stock [Member] | Duke Energy Ohio [Member] Additional Paid-in Capital [Member] | Duke Energy Ohio [Member] Retained Earnings [Member] | Duke Energy Indiana [Member] | Piedmont Natural Gas [Member] | Piedmont Natural Gas [Member] Common Stock [Member] | Piedmont Natural Gas [Member] Retained Earnings [Member] | Common Stock [Member] | Common Stock [Member] Common Stockholders' Equity [Member] | Common Stock [Member] Common Stock [Member] | Common Stock [Member] Additional Paid-in Capital [Member] | Preferred Stock [Member] | Preferred Stock [Member] Preferred Stock [Member] | Preferred Stock [Member] Common Stockholders' Equity [Member]
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Beginning Balance at Dec. 31, 2017 |  | $ 41,737 |  |  | $ 41,739 |  | $ 1 | $ 38,792 |  | $ 3,013 |  | $ (10) |  | $ 12 |  | $ (69) |  | $ (2) |  |  |  |  | $ 13,465 |  | $ 13,468 |  | $ 9,143 |  | $ 4,350 |  | $ (18) |  | $ 5 |  | $ (12) |  | $ (3) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning Balance, in shares at Dec. 31, 2017 |  |  |  |  |  |  | 700,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning Balance (member's equity) at Dec. 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,361 | $ 11,368 | $ (7) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,949 | $ 5,618 |  | $ 5,614 |  | $ 4 |  |  |  |  |  | $ 4,121 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning Balance (parent) at Dec. 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,163 | $ 762 | $ 2,670 | $ (269) |  | $ 1,662 | $ 860 | $ 802 |  |  |  |  |  |  |  |  |  |
Net income (attributable to parent) |  | 1,120 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 440 | 440 |  | 500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 316 | 271 |  | 271 |  |  |  | 21 |  |  | 21 | 198 | 102 |  | 102 |  |  |  |  |  |  |  |  |  |
Net Income |  | 1,124 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 504 |  | 500 |  |  |  | 500 |  |  |  |  |  |  |  | 4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 1,124 |  |  | 1,120 |  |  |  |  | 1,120 |  |  |  |  |  |  |  | 4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) |  | 9 |  |  | 9 |  |  |  |  |  |  | 12 |  | (5) |  | 2 |  |  |  | 1 |  | 1 | 4 |  | 4 |  |  |  |  |  | 3 |  | (1) |  | 2 |  |  |  |  | (1) |  |  |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issuances, shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,000,000 |  |  |  |  |  |  |
Stock issuances |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 890 | $ 890 |  | $ 890 |  |  |  |  |  |
Common stock dividends |  | (1,251) |  |  | (1,251) |  |  |  |  | (1,251) |  |  |  |  |  |  |  |  |  | (500) | (500) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (75) |  |  |  |  |  |  |  |  |  |  |  |  |
Distributions to noncontrolling interest in subsidiaries |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1) |  |  |  |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other |  | 7 | [1] |  | 0 | [1] |  |  |  | 12 | [1] |  |  | (12) | [1] |  |  | 7 | [1] |  |  |  |  |  | 0 | [2] | 0 | [2] | 5 | [2] |  |  | (5) | [2] |  |  |  |  |  | 0 | [3] | 5 | [3] | (5) | [3] | 106 |  | 106 |  |  | 300 | 300 |  |  |  |  |  |  |  |  |  |  |
Distributions to noncontrolling interest in subsidiaries |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1) |  |  |  |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance at Jun. 30, 2018 |  | 42,515 |  |  | 42,507 |  | $ 1 | 39,682 |  | 2,894 |  | 2 |  | (5) |  | (67) |  | 8 |  |  |  |  | 13,972 |  | 13,972 |  | 9,143 |  | 4,855 |  | (15) |  | (1) |  | (10) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance, in shares at Jun. 30, 2018 |  |  |  |  |  |  | 712,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance (member's equity) at Jun. 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,302 | 11,308 | (6) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,265 | 5,888 |  | 5,890 |  | (2) |  |  |  |  |  | 4,244 |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance (parent) at Jun. 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,290 | 762 | 2,776 | (248) |  | 2,064 | 1,160 | 904 |  |  |  |  |  |  |  |  |  |
Beginning Balance at Mar. 31, 2018 |  | 41,798 |  |  | 41,792 |  | $ 1 | 38,839 |  | 3,021 |  | 3 |  | (4) |  | (68) |  | 6 |  |  |  |  | 13,703 |  | 13,704 |  | 9,142 |  | 4,591 |  | (16) |  | (1) |  | (12) |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning Balance, in shares at Mar. 31, 2018 |  |  |  |  |  |  | 701,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning Balance (member's equity) at Mar. 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,435 | 11,441 | (6) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,126 | 5,721 |  | 5,723 |  | (2) |  |  |  |  |  | 4,221 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning Balance (parent) at Mar. 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,138 | 762 | 2,670 | (294) |  | 1,772 | 860 | 912 |  |  |  |  |  |  |  |  |  |
Net income (attributable to parent) |  | 500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 117 | 117 |  | 265 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 139 | 168 |  | 168 |  |  |  | 46 |  |  | 46 | 98 | (8) |  | (8) |  |  |  |  |  |  |  |  |  |
Net Income |  | 502 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 267 |  | 265 |  |  |  | 265 |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 502 |  |  | 500 |  |  |  |  | 500 |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) |  | (2) |  |  | (2) |  |  |  |  |  |  | (1) |  | (2) |  | 1 |  |  |  |  |  |  | 2 |  | 2 |  |  |  |  |  | 1 |  | (1) |  | 2 |  |  |  |  | (1) |  |  |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issuances, shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,000,000 |  |  |  |  |  |  |
Stock issuances |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 843 | 843 |  | 843 |  |  |  |  |  |
Common stock dividends |  | (626) |  |  | (626) |  |  |  |  | (626) |  |  |  |  |  |  |  |  |  | (250) | (250) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (75) |  |  |  |  |  |  |  |  |  |  |  |  |
Distributions to noncontrolling interest in subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other |  | 0 |  |  | 0 |  |  |  |  | (1) |  |  |  | 1 |  |  |  |  |  |  |  |  | 1 | [2] | 1 | [2] | 1 | [2] | (1) | [2] |  |  | 1 | [2] |  |  |  |  |  | 0 | [3] | (1) | [3] | 1 | [3] | 106 |  | 106 |  |  | 300 | 300 |  |  |  |  |  |  |  |  |  |  |
Distributions to noncontrolling interest in subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance at Jun. 30, 2018 |  | 42,515 |  |  | 42,507 |  | $ 1 | 39,682 |  | 2,894 |  | 2 |  | (5) |  | (67) |  | 8 |  |  |  |  | 13,972 |  | 13,972 |  | 9,143 |  | 4,855 |  | (15) |  | (1) |  | (10) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance, in shares at Jun. 30, 2018 |  |  |  |  |  |  | 712,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance (member's equity) at Jun. 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,302 | 11,308 | (6) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,265 | 5,888 |  | 5,890 |  | (2) |  |  |  |  |  | 4,244 |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance (parent) at Jun. 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,290 | 762 | 2,776 | (248) |  | $ 2,064 | 1,160 | 904 |  |  |  |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2018 |  | $ 43,834 |  | $ 0 | 43,817 |  | $ 1 | 40,795 |  | 3,113 |  | (14) |  | (3) |  | (75) |  | 17 |  |  |  |  | $ 14,257 |  | 14,254 |  | 9,143 |  | 5,131 |  | (12) |  | (1) |  | (7) |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning Balance, in shares at Dec. 31, 2018 |  | 727,000,000 |  |  |  |  | 727,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 90,000,000 |  |  |  |  | 100 |  |  |  |  |  |  |  |  |  |  |  |
Beginning Balance (member's equity) at Dec. 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,683 | 11,689 | (6) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,441 | 6,095 |  | 6,097 |  | (2) |  |  |  |  |  | 4,339 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning Balance (parent) at Dec. 31, 2018 |  | $ 43,817 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 14,254 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,445 | 762 | 2,776 | (93) |  | $ 2,091 | 1,160 | 931 |  |  |  |  |  |  |  |  |  |
Net income (attributable to parent) |  | 1,720 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 594 | 594 |  | 577 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 372 | 297 |  | 297 |  |  |  | $ 116 |  |  | 116 | 207 | 115 |  | 115 |  |  |  |  |  |  |  |  |  |
Net Income |  | 1,641 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 577 |  | 577 |  |  |  | 577 |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 1,629 |  |  | 1,720 |  |  |  |  | 1,720 |  |  |  |  |  |  |  | (91) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) |  | (32) |  |  | (32) |  |  |  |  |  |  | (43) |  | 8 |  | 3 |  |  |  |  |  |  | 6 |  | 6 |  |  |  |  |  | 3 |  | 1 |  | 2 |  |  |  |  | 1 |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issuances, shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 |  |  |  | 40,000,000 |  |  |
Stock issuances |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 89 | 89 |  | 89 | $ 973 | [4] | $ 973 | [4] | $ 973 | [4]
Common stock dividends |  | (1,354) |  |  | (1,354) |  |  |  |  | (1,354) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributions to noncontrolling interest in subsidiaries |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other |  | 1 | [5] |  | 0 | [5] |  | 1 | [5] | 23 | [5] | (6) | [5] | (1) | [5] | (17) | [5] | 1 | [5] | (1) |  | (1) | (1) | [6] |  |  |  |  | 7 | [6] | (4) | [6] | 0 | [6] | (3) | [6] | (1) | [6] |  |  |  |  |  |  |  |  |  |  |  |  | $ 150 | 150 |  |  |  |  |  |  |  |  |  |  |
Distributions to noncontrolling interest in subsidiaries |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contribution from noncontrolling interest in subsidiaries | [7] | 193 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 193 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance at Jun. 30, 2019 |  | $ 45,332 |  | 973 | 45,213 |  | $ 1 | 40,885 |  | 3,502 |  | (63) |  | 4 |  | (89) |  | 119 |  |  |  |  | $ 14,839 |  | 14,837 |  | 9,143 |  | 5,715 |  | (13) |  |  |  | (8) |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance, in shares at Jun. 30, 2019 |  | 40,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance, in shares at Jun. 30, 2019 |  | 728,000,000 |  |  |  |  | 728,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 90,000,000 |  |  |  |  | 100 |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance (member's equity) at Jun. 30, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,276 | 12,283 | (7) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,813 | 6,393 |  | 6,394 |  | (1) |  |  |  |  |  | 4,546 |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance (parent) at Jun. 30, 2019 |  | $ 45,213 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 14,837 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,561 | 762 | 2,776 | 23 |  | $ 2,356 | 1,310 | 1,046 |  |  |  |  |  |  |  |  |  |
Beginning Balance at Mar. 31, 2019 |  | 45,045 |  | 974 | 45,030 |  | $ 1 | 40,823 |  | 3,360 |  | (36) |  |  |  | (92) |  | 15 |  |  |  |  | 14,508 |  | 14,506 |  | 9,143 |  | 5,386 |  | (14) |  | (1) |  | (8) |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning Balance, in shares at Mar. 31, 2019 |  |  |  |  |  |  | 728,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning Balance (member's equity) at Mar. 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,975 | 11,982 | (7) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,644 | 6,192 |  | 6,193 |  | (1) |  |  |  |  |  | 4,449 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning Balance (parent) at Mar. 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,514 | 762 | 2,776 | (24) |  | 2,213 | 1,160 | 1,053 |  |  |  |  |  |  |  |  |  |
Net income (attributable to parent) |  | 820 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 301 | 301 |  | 328 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 169 | 201 |  | 201 |  |  |  | $ 47 |  |  | 47 | 97 | (7) |  | (7) |  |  |  |  |  |  |  |  |  |
Net Income |  | 748 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 329 |  | 328 |  |  |  | 328 |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 736 |  |  | 820 |  |  |  |  | 820 |  |  |  |  |  |  |  | (84) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) |  | (20) |  |  | (20) |  |  |  |  |  |  | (27) |  | 4 |  | 3 |  |  |  |  |  |  | 3 |  | 3 |  |  |  |  |  | 1 |  | $ 1 |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issuances |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 61 | $ 61 |  | $ 61 | $ (1) |  | $ (1) |  | $ (1) |
Common stock dividends |  | (678) |  |  | (678) |  |  |  |  | (678) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributions to noncontrolling interest in subsidiaries |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other |  | (3) |  |  | 1 |  |  | 1 |  |  |  | 0 |  |  |  |  |  | (4) |  |  |  |  | (1) |  |  |  |  |  | 1 |  |  |  |  |  | (1) |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 150 | 150 |  |  |  |  |  |  |  |  |  |  |
Distributions to noncontrolling interest in subsidiaries |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contribution from noncontrolling interest in subsidiaries |  | 193 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 193 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance at Jun. 30, 2019 |  | $ 45,332 |  | $ 973 | $ 45,213 |  | $ 1 | $ 40,885 |  | $ 3,502 |  | $ (63) |  | $ 4 |  | $ (89) |  | $ 119 |  |  |  |  | $ 14,839 |  | $ 14,837 |  | $ 9,143 |  | $ 5,715 |  | $ (13) |  |  |  | $ (8) |  | $ 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance, in shares at Jun. 30, 2019 |  | 40,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance, in shares at Jun. 30, 2019 |  | 728,000,000 |  |  |  |  | 728,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 90,000,000 |  |  |  |  | 100 |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance (member's equity) at Jun. 30, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,276 | $ 12,283 | $ (7) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,813 | $ 6,393 |  | $ 6,394 |  | $ (1) |  |  |  |  |  | $ 4,546 |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance (parent) at Jun. 30, 2019 |  | $ 45,213 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 14,837 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,561 | $ 762 | $ 2,776 | $ 23 |  | $ 2,356 | $ 1,310 | $ 1,046 |  |  |  |  |  |  |  |  |  |
[1] | Amounts in Retained Earnings and Accumulated Other Comprehensive (Loss) Income represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement.
[2] | Amounts in Retained Earnings and Accumulated Other Comprehensive (Loss) Income represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement.
[3] | Amounts in Member's Equity and Accumulated Other Comprehensive Income (Loss) represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement.
[4] | Duke Energy issued 40 million depositary shares of preferred stock in the first quarter of 2019.
[5] | Amounts in Retained Earnings and Accumulated Other Comprehensive (Loss) Income primarily represent impacts to accumulated other comprehensive income due to implementation of a new accounting standard related to Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.
[6] | Amounts in Retained Earnings and Accumulated Other Comprehensive (Loss) Income primarily represent impacts to accumulated other comprehensive income due to implementation of a new accounting standard related to Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.
[7] | Relates to tax equity financing activity in the Commercial Renewables segment.

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