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Summary of Significant Accounting Policies (Noncontrolling Interest) (Details) - Noncontrolling Interests $ in Millions | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 31, 2021 USD ($) | Sep. 30, 2019 USD ($) asset | Jan. 31, 2023 | Jun. 30, 2021
Duke Energy Indiana [Member] | Subsequent Event |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |
Value of sale of parent interest | $ 2,000 |  |  |
Percentage sold | 19.90% |  |  |
Holding company ownership of interest | 100.00% |  |  |
Ownership interest sold |  |  | 19.90% | 11.10%
Proceed of purchase price for exchange in interest |  |  | 50.00% | 50.00%
Renewables |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |
Value of sale of parent interest |  | $ 415 |  |
Ownership interest change |  | 466 |  |
Tax benefit from sale of interest |  | $ 8 |  |
Wind and Solar Storage |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |
Percentage sold |  | 49.00% |  |
Number of assets sold | asset |  | 37 |  |
Operating Solar Assets |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |
Percentage sold |  | 33.00% |  |
Number of assets sold | asset |  | 11 |  |

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- Definition The increase (decrease) during the period impacting the parent's ownership interest in a subsidiary as it relates to the total (consolidated) equity attributable to the parent. The changes to the parent's ownership interest in a subsidiary represented by this element did not arise in a deconsolidation of the subsidiary from the consolidated financial statements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4M -URI http://asc.fasb.org/extlink&oid=120409616&loc=SL4591554-111686 + Details
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