XML 74 R58.htm IDEA: XBRL DOCUMENT v3.24.0.1
Summary of Significant Accounting Policies - Reconciliation of Equity in Earnings (Losses) of Unconsolidated Affiliates (Details) - USD ($)
$ in Millions
11 Months Ended 12 Months Ended
Dec. 02, 2021
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]        
Net income (loss)   $ 416.8 $ 665.7 $ 737.3
Proportionate Unconsolidated Affiliate Net Income $ 119.8      
Amortization of basis difference and dilution recognition [1] 50.0      
Equity in earnings of unconsolidated affiliates $ 169.8 $ 0.0 $ 0.0 $ 169.8
OGE Holdings [Member]        
Schedule of Equity Method Investments [Line Items]        
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest 25.50%      
Equity Method Investment Nonconsolidated Investees [Member]        
Schedule of Equity Method Investments [Line Items]        
Equity in earnings of unconsolidated affiliates $ 470.0      
[1] Includes loss on dilution, net of proportional basis difference recognition.