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v3.24.0.1

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Income Taxes [Line Items] |  |
Accelerated depreciation and other property related differences | $ 1,753.8 | $ 1,714.5
Regulatory assets | 67.6 | 54.8
Pension Plan | 21.8 | 18.0
Corporate owned life insurance | 2.6 | 2.4
Bond redemption-unamortized costs | 1.4 | 1.6
Income taxes recoverable from customers, net | (202.7) | (216.7)
State tax credits | (228.8) | (221.2)
Regulatory liabilities | (54.4) | (60.8)
Asset retirement obligations | (19.7) | (18.8)
Postretirement medical and life insurance benefits | (20.8) | (19.2)
Accrued liabilities | (13.2) | (11.2)
Deferred federal investment tax credits | (2.7) | (2.9)
Accrued vacation | (1.4) | (1.4)
Uncollectible accounts | (0.5) | (0.5)
Other | (2.2) | (5.1)
Deferred Income Tax Liabilities, Net, Total | 1,300.8 | 1,233.5
Og and E [Member] |  |
Income Taxes [Line Items] |  |
Accelerated depreciation and other property related differences | 1,753.8 | 1,714.5
Regulatory assets | 67.6 | 54.7
Pension Plan | 37.9 | 35.4
Corporate owned life insurance | 0.0 | 0.0
Bond redemption-unamortized costs | 1.4 | 1.6
Income taxes recoverable from customers, net | (202.7) | (216.7)
State tax credits | (213.5) | (208.5)
Regulatory liabilities | (54.4) | (60.8)
Asset retirement obligations | (19.7) | (18.8)
Postretirement medical and life insurance benefits | (14.0) | (12.7)
Accrued liabilities | (5.5) | (7.3)
Deferred federal investment tax credits | (2.7) | (2.9)
Accrued vacation | (1.4) | (1.1)
Uncollectible accounts | (0.4) | (0.5)
Other | (5.6) | (5.8)
Deferred Income Tax Liabilities, Net, Total | $ 1,340.8 | $ 1,271.1

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