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Debt (Schedule Of Debt Maturities) (Details) $ in Millions | Dec. 31, 2022 USD ($)
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2023 | $ 408
2024 | 909
2025 | 300
2026 | 200
2027 | 300
IPL [Member] |
2023 | 0
2024 | 500
2025 | 300
2026 | 0
2027 | 0
WPL [Member] |
2023 | 0
2024 | 0
2025 | 0
2026 | 0
2027 | 300
Alliant Energy Finance, LLC [Member] |
2023 | 408
2024 | 409
2025 | 0
2026 | 200
2027 | $ 0

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- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1E -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=123465755&loc=d3e1835-112601 + Details
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