XML 180 R139.htm IDEA: XBRL DOCUMENT v3.25.3
FAIR VALUE MEASUREMENTS - Changes in Fair Value (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Beginning Balance $ 382.8 $ 288.2 $ 165.6 $ 139.4
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) 44.7 60.4 155.3 90.6
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date 13.2 (6.9) 31.1 2.3
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income 1.5 (0.1) 14.0 1.5
Settlements (131.6) (133.1) (276.9) (164.7)
Transfers into Level 3 7.1 (0.3) 1.0 6.8
Transfers out of Level 3 (5.2) (0.6) (3.0) 2.2
Changes in Fair Value Allocated to Regulated Jurisdiction 14.6 (14.5) 240.0 115.0
Ending Balance 327.1 193.1 327.1 193.1
APCo        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Beginning Balance 108.3 67.8 35.2 22.4
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) 15.6 13.4 49.4 24.1
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date 0.0 0.0 0.0 0.0
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income 0.0 0.0 0.0 0.0
Settlements (34.4) (26.9) (84.6) (46.5)
Transfers into Level 3 0.0 0.0 0.0 0.0
Transfers out of Level 3 0.0 0.0 0.0 0.0
Changes in Fair Value Allocated to Regulated Jurisdiction 1.8 (7.1) 91.3 47.2
Ending Balance 91.3 47.2 91.3 47.2
I&M        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Beginning Balance 12.3 14.5 6.4 2.8
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) 3.6 2.9 12.9 7.3
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date 0.0 0.0 0.0 0.0
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income 0.0 0.0 0.0 0.0
Settlements (7.1) (7.9) (19.2) (10.0)
Transfers into Level 3 0.0 0.0 0.0 0.0
Transfers out of Level 3 0.0 0.0 0.0 0.0
Changes in Fair Value Allocated to Regulated Jurisdiction 2.1 (0.2) 10.8 9.2
Ending Balance 10.9 9.3 10.9 9.3
OPCo        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Beginning Balance (47.7) (43.2) (47.5) (50.6)
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) (0.1) (0.1) 0.0 (0.9)
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date 0.0 0.0 0.0 0.0
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income 0.0 0.0 0.0 0.0
Settlements 1.0 1.0 5.3 6.0
Transfers into Level 3 0.0 0.0 0.0 0.0
Transfers out of Level 3 0.0 0.0 0.0 0.0
Changes in Fair Value Allocated to Regulated Jurisdiction 2.5 (9.3) (2.1) (6.1)
Ending Balance (44.3) (51.6) (44.3) (51.6)
PSO        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Beginning Balance 96.9 49.4 20.0 18.6
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) 14.1 23.2 37.9 26.2
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date 0.0 0.0 0.0 0.0
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income 0.0 0.0 0.0 0.0
Settlements (45.2) (46.3) (57.9) (44.8)
Transfers into Level 3 0.0 0.0 0.0 0.0
Transfers out of Level 3 0.0 0.0 0.0 0.0
Changes in Fair Value Allocated to Regulated Jurisdiction (0.5) 2.1 65.3 28.4
Ending Balance 65.3 28.4 65.3 28.4
SWEPCo        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Beginning Balance 69.1 38.1 17.5 11.1
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) 9.6 21.2 42.2 23.6
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date 0.0 0.0 0.0 0.0
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income 0.0 0.0 0.0 0.0
Settlements (29.9) (37.7) (59.7) (36.0)
Transfers into Level 3 0.0 0.0 0.0 0.0
Transfers out of Level 3 0.0 0.0 0.0 0.5
Changes in Fair Value Allocated to Regulated Jurisdiction 7.8 2.1 56.6 24.5
Ending Balance $ 56.6 $ 23.7 $ 56.6 $ 23.7