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v3.25.1

Capitalization and Short-Term Borrowings (Summary of Changes in Common Stock Equity) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2025 | Mar. 31, 2024
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning balance (in shares) |  |  |  | 91,005,993 |
Beginning balance |  |  |  | $ 2,848,343 |
Net Income Available for Common Stock |  | $ 216,358 | $ 166,272 | 261,344 | $ 299,292
Dividends Declared on Common Stock |  | (46,555) | (45,563) | (93,226) | (91,160)
Other Comprehensive Income (Loss), Net of Tax |  | $ (146,822) | $ 7,959 | $ (207,499) | $ 130,400
Share Repurchases (in shares) |  |  |  | (608,295) |
Ending balance (in shares) |  | 90,397,698 |  | 90,397,698 |
Ending balance |  | $ 2,765,611 |  | $ 2,765,611 |
Dividends per share (in dollars per share) |  | $ 0.515 | $ 0.495 | $ 1.030 | $ 0.990
Share Repurchase Plan |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Share Repurchases (in shares) |  |  |  | (774,768) |
Share Repurchases |  |  |  | $ (49,800) |
Common Stock |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning balance (in shares) |  | 90,613,000 | 92,116,000 | 91,006,000 | 91,819,000
Beginning balance |  | $ 90,613 | $ 92,116 | $ 91,006 | $ 91,819
Common stock issued under stock and benefit plans (in shares) |  | 11,000 | 12,000 | 167,000 | 309,000
Common Stock Issued Under Stock and Benefit Plans |  | $ 11 | $ 12 | $ 167 | $ 309
Ending balance (in shares) |  | 90,398,000 | 92,032,000 | 90,398,000 | 92,032,000
Ending balance |  | $ 90,398 | $ 92,032 | $ 90,398 | $ 92,032
Common Stock | Share Repurchase Plan |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Share Repurchases (in shares) |  | (226,000) | (96,000) | (775,000) | (96,000)
Share Repurchases |  | $ (226) | $ (96) | $ (775) | $ (96)
Paid In Capital |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning balance |  | 1,039,705 | 1,041,226 | 1,045,487 | 1,040,761
Share-Based Payment Expense | [1] | 5,135 | 5,222 | 9,225 | 9,356
Common Stock Issued Under Stock and Benefit Plans |  | 604 | 569 |  |
Ending balance |  | 1,042,822 | 1,045,929 | 1,042,822 | 1,045,929
Paid In Capital | Stock and Benefit Plans |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Share Repurchases |  |  |  | (2,906) | (3,100)
Paid In Capital | Share Repurchase Plan |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Share Repurchases |  | (2,622) | (1,088) | (8,984) | (1,088)
Earnings Reinvested in the Business |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning balance |  | 1,698,648 | 1,973,279 | 1,727,326 | 1,885,856
Net Income Available for Common Stock |  | 216,358 | 166,272 | 261,344 | 299,292
Dividends Declared on Common Stock |  | (46,555) | (45,563) | (93,226) | (91,160)
Share Repurchases |  | (13,085) | (3,816) | (40,078) | (3,816)
Ending balance |  | 1,855,366 | 2,090,172 | 1,855,366 | 2,090,172
Earnings Reinvested in the Business | Share Repurchase Plan |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Share Repurchases |  | (13,085) | (3,816) | (40,078) | (3,816)
Accumulated Other Comprehensive Income (Loss) |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning balance |  | (76,153) | 67,381 | (15,476) | (55,060)
Other Comprehensive Income (Loss), Net of Tax |  | (146,822) | 7,959 | (207,499) | 130,400
Ending balance |  | $ (222,975) | $ 75,340 | $ (222,975) | $ 75,340
[1] | Paid in Capital includes compensation costs associated with performance shares and/or restricted stock awards. The expense is included within Net Income Available For Common Stock, net of tax benefits.

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