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SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT (PARENT COMPANY) - STATEMENTS OF CASH FLOWS (Details) - USD ($) | 12 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Condensed Financial Statements, Captions [Line Items] |  |  |
NET CASH PROVIDED BY OPERATING ACTIVITIES | $ 1,227,000,000 | $ 1,182,000,000 | $ 1,107,000,000
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |
Net cash provided (used) by investing activities | (699,000,000) | (792,000,000) | (1,077,000,000)
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |
Dividends on Common Stock | (322,000,000) | (318,000,000) | (308,000,000)
Issuances of debt, net of issuance costs | 1,684,000,000 | 1,321,000,000 | 1,930,000,000
Issuances of Common Stock | 18,000,000 | 0 | 12,000,000
Repurchases of Common Stock | (33,000,000) | 0 | (22,000,000)
Net cash provided (used) by financing activities | (406,000,000) | (506,000,000) | (168,000,000)
Cash, cash equivalents and restricted cash increase (decrease) | 127,000,000 | (112,000,000) | (129,000,000)
Cash and cash equivalents: |  |  |
Cash, cash equivalents and restricted cash at end of year | 355,000,000 | 228,000,000 | 340,000,000
Cash, cash equivalents and restricted cash at beginning of year | 228,000,000 | 340,000,000 | 469,000,000
Cash and cash equivalents increase (decrease) | 127,000,000 | (112,000,000) | (129,000,000)
Parent Company |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
NET CASH PROVIDED BY OPERATING ACTIVITIES | 339,000,000 | 379,000,000 | 636,000,000
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |
Net investments in unconsolidated subsidiaries | (30,000,000) | (355,000,000) | (309,000,000)
Net cash provided (used) by investing activities | (30,000,000) | (355,000,000) | (309,000,000)
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |
Dividends on Common Stock | (322,000,000) | (318,000,000) | (308,000,000)
Issuances of debt, net of issuance costs | 898,000,000 | 1,078,000,000 | 327,000,000
Repayments of long-term debt | (870,000,000) | (775,000,000) | (333,000,000)
Issuances of Common Stock | 18,000,000 | 0 | 12,000,000
Repurchases of Common Stock | (33,000,000) | 0 | (22,000,000)
Payments on Purchase Contracts | 0 | (12,000,000) | (16,000,000)
Net cash provided (used) by financing activities | (309,000,000) | (27,000,000) | (340,000,000)
Cash, cash equivalents and restricted cash increase (decrease) | 0 | (3,000,000) | (13,000,000)
Cash and cash equivalents: |  |  |
Cash, cash equivalents and restricted cash at end of year | 4,000,000 | 4,000,000 | 7,000,000
Cash, cash equivalents and restricted cash at beginning of year | 4,000,000 | 7,000,000 | 20,000,000
Cash and cash equivalents increase (decrease) | 0 | (3,000,000) | (13,000,000)
Dividends from unconsolidated subsidiaries | $ 466,000,000 | $ 420,000,000 | $ 680,000,000

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