v3.26.3
CONDENSED STATEMENTS OF CASH FLOWS - PSO - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:    
Depreciation and Amortization $ 2,842 $ 2,566
Deferred Income Taxes 515 124
Allowance for Equity Funds Used During Construction (226) (173)
Mark-to-Market of Risk Management Contracts (116) (193)
Property Taxes 564 541
Deferred Fuel Over/Under-Recovery, Net 133 165
Change in Other Noncurrent Assets (838) (720)
Change in Other Noncurrent Liabilities 673 134
Changes in Certain Components of Working Capital:    
Accounts Receivable, Net (528) (212)
Fuel, Materials and Supplies (162) 151
Accounts Payable 603 327
Accrued Taxes, Net (899) (687)
Other Current Assets (81) 38
Other Current Liabilities 388 74
Net Cash Flows from Operating Activities 5,767 5,131
INVESTING ACTIVITIES    
Construction Expenditures (9,107) (6,001)
Acquisitions of Generation Facilities (2,394) (1,657)
Other Investing Activities (58) (92)
Net Cash Flows Used for Investing Activities (11,171) (7,749)
FINANCING ACTIVITIES    
Issuance of Long-term Debt 7,026 6,249
Retirement of Long-term Debt (1,834) (2,804)
Other Financing Activities (68) (35)
Net Cash Flows from (Used for) Financing Activities 5,643 3,479
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash 239 861
Cash, Cash Equivalents and Restricted Cash at Beginning of Period 268 246
Cash, Cash Equivalents and Restricted Cash at End of Period 507 1,107
SUPPLEMENTARY INFORMATION    
Cash Paid for Interest, Net of Capitalized Amounts 1,548 1,315
Construction Expenditures Included in Current Liabilities as of September 30, 1,813 1,169
PUBLIC SERVICE COMPANY OF OKLAHOMA    
OPERATING ACTIVITIES    
Net Income 303 221
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:    
Depreciation and Amortization 283 203
Deferred Income Taxes 83 31
Allowance for Equity Funds Used During Construction (9) (7)
Mark-to-Market of Risk Management Contracts 7 (34)
Property Taxes (19) (16)
Deferred Fuel Over/Under-Recovery, Net 14 42
Change in Other Regulatory Assets (12) (57)
Change in Other Noncurrent Assets (41) (35)
Change in Other Noncurrent Liabilities 156 14
Changes in Certain Components of Working Capital:    
Accounts Receivable, Net (20) (34)
Fuel, Materials and Supplies (37) 4
Accounts Payable 31 142
Customer Deposits 238 42
Accrued Taxes, Net (46) 76
Other Current Assets (16) (2)
Other Current Liabilities (23) (19)
Net Cash Flows from Operating Activities 892 571
INVESTING ACTIVITIES    
Construction Expenditures (1,089) (534)
Change in Advances to Affiliates, Net (70) 232
Acquisitions of Generation Facilities (608) (1,657)
Other Investing Activities 1 7
Net Cash Flows Used for Investing Activities (1,766) (1,952)
FINANCING ACTIVITIES    
Capital Contribution from Parent 113 675
Issuance of Long-term Debt 986 793
Change in Advances from Affiliates, Net (171) 40
Retirement of Long-term Debt (50) (125)
Other Financing Activities (2) (1)
Net Cash Flows from (Used for) Financing Activities 876 1,382
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash 2 1
Cash, Cash Equivalents and Restricted Cash at Beginning of Period 2 2
Cash, Cash Equivalents and Restricted Cash at End of Period 4 3
SUPPLEMENTARY INFORMATION    
Cash Paid for Interest, Net of Capitalized Amounts 152 96
Construction Expenditures Included in Current Liabilities as of September 30, $ 187 $ 91