Shareholders' Equity |
6 Months Ended |
|---|---|
Mar. 31, 2026 | |
| Stockholders' Equity Note [Abstract] | |
| Shareholders' Equity | ATM Program Under Spire’s “at-the-market” (“ATM”) equity distribution agreement and as authorized by its board of directors, the Company may offer and sell, from time to time, shares of its common stock (including shares of common stock that may be sold pursuant to forward sale agreements entered into in connection with the ATM equity distribution agreement). Settled sales under this ATM program are included in “Common stock issued” in the Condensed Consolidated Statements of Shareholders’ Equity. On January 25, 2024, Spire’s board approved a new authorization for the sale of additional shares with an aggregate offering price of up to $200.0 through January 2027. In the second and third quarters of fiscal 2024, Spire executed forward sale agreements for a total of 542,515 shares of its common stock, which were settled in December 2024, generating $32.4 of net proceeds. In the fourth quarter of fiscal 2024, Spire executed forward sale agreements for 663,619 shares of its common stock, which were settled in March 2025, generating proceeds of $42.4. As of March 31, 2026, there were no outstanding forward sales agreements. As of March 31, 2026, under the ATM Program, Spire may sell additional shares with an aggregate offering price of up to $123.6. Preferred Stock In February 2026, the Company redeemed all outstanding shares of its 5.90% Series A Cumulative Redeemable Perpetual Preferred Stock (aggregate $250.0 million liquidation preference) (the “Series A Preferred Stock”), upon which the corresponding 10,000,000 outstanding depositary shares representing the Series A Preferred Stock were also redeemed. Following the redemption, dividends ceased to be accrued on the Series A Preferred Stock, shares of the Series A Preferred Stock were no longer deemed outstanding and all rights of the holders of such shares of the Series A Preferred Stock terminated. In conjunction with the redemption, Spire recorded $8.0 in preferred stock redemption costs, calculated as the difference of between the carrying value on the redemption date of the Series A Preferred Stock and the total amount of consideration paid to redeem. The preferred stock redemption costs were recorded as a reduction to Retained Earnings on Spire’s Condensed Consolidated Balance Sheets during the three months ended March 31, 2026. |