Shareholder's Equity	9 Months Ended
Jun. 30, 2019
Stockholders Equity Note [Abstract]
Shareholder's Equity	5. SHAREHOLDERS’ EQUITY Preferred Stock On May 21, 2019, Spire completed the public offering of 10,000,000 depositary shares (the “Depositary Shares”), each representing a 1/1,000^th interest in a share of the Company’s 5.90% Series A Cumulative Redeemable Perpetual Preferred Stock, par value $25.00 per share, with a liquidation preference of $25,000 per share (the “Preferred Stock”). The transaction resulted in $242.0 of net proceeds, after deducting commissions and sale expenses, which proceeds were used to (i) refinance long-term and short-term Spire debt and (ii) fund capital expenditures at both the Utilities and Spire’s gas-related businesses. Dividends on the Preferred Stock, when declared by Spire’s Board of Directors (the “Board”), will be payable on the liquidation preference amount, on a cumulative basis, quarterly in arrears on the 15^th day of February, May, August and November of each year, beginning on August 15, 2019. Dividends will be payable out of amounts legally available for the payment of dividends at an annual rate equal to 5.90% of the liquidation preference per share of Preferred Stock (equivalent to $25.00 per Depositary Share). Dividends will accumulate daily and be cumulative from May 21, 2019. Under the terms of the Preferred Stock, the Company’s ability to declare or pay dividends on, or purchase or redeem, shares of its common stock or any class or series of capital stock of the Company that rank junior to the Preferred Stock will be subject to certain restrictions in the event that the Company does not declare and pay the full cumulative dividends on the Preferred Stock through the most recently completed quarterly dividend period. Spire may, at its option, redeem the Preferred Stock (i) in whole, but not in part, at any time prior to August 15, 2024, within 120 days after a ratings event where a rating agency amends, clarifies or changes the criteria it uses to assign equity credit for securities such as the Preferred Stock, at a redemption price in cash equal to $25,500 per share, or (ii) in whole or in part, from time to time, on or after August 15, 2024, at a redemption price in cash equal to $25,000 per share, plus, in each case, all accumulated and unpaid dividends (whether declared or not) up to such redemption date. Shareholders of the Preferred Stock generally have no voting rights with respect to matters that generally require the approval of voting stockholders. The limited voting rights of holders of the Preferred Stock include the right to vote on certain matters that may affect the preference or special rights of the Preferred Stock. In addition, if and whenever dividends on any shares of Preferred Stock have not been declared and paid for at least six dividend periods, whether or not consecutive, the number of directors then constituting Spire’s Board of Directors shall automatically be increased by two (to be elected by the holders of the Preferred Stock) until all accumulated and unpaid dividends on the Preferred Stock have been paid in full. ATM Program On February 6, 2019, Spire entered into an at-the-market (ATM) equity distribution agreement, supplemented as of May 14, 2019, pursuant to which the Company may offer and sell, from time to time, shares of its common stock having an aggregate offering price of up to $150.0. Proceeds from this program are intended to be used (i) to fund, in part, investments related to the construction of infrastructure and infrastructure improvements in the Utilities, as well as pipelines and storage, and (ii) for general corporate purposes, including repayment of short-term debt and the adjustment from time to time of the Company’s capital structure. In the quarter ended June 30, 2019, Spire issued 59,630 shares under this program, generating $4.9 of proceeds net of issuance costs.

Shareholder's Equity

9 Months Ended

Jun. 30, 2019

5. SHAREHOLDERS’ EQUITY

Preferred Stock

On May 21, 2019, Spire completed the public offering of 10,000,000 depositary shares (the “Depositary Shares”), each representing a 1/1,000^th interest in a share of the Company’s 5.90% Series A Cumulative Redeemable Perpetual Preferred Stock, par value $25.00 per share, with a liquidation preference of $25,000 per share (the “Preferred Stock”). The transaction resulted in $242.0 of net proceeds, after deducting commissions and sale expenses, which proceeds were used to (i) refinance long-term and short-term Spire debt and (ii) fund capital expenditures at both the Utilities and Spire’s gas-related businesses.

Dividends on the Preferred Stock, when declared by Spire’s Board of Directors (the “Board”), will be payable on the liquidation preference amount, on a cumulative basis, quarterly in arrears on the 15^th day of February, May, August and November of each year, beginning on August 15, 2019. Dividends will be payable out of amounts legally available for the payment of dividends at an annual rate equal to 5.90% of the liquidation preference per share of Preferred Stock (equivalent to $25.00 per Depositary Share). Dividends will accumulate daily and be cumulative from May 21, 2019.

Under the terms of the Preferred Stock, the Company’s ability to declare or pay dividends on, or purchase or redeem, shares of its common stock or any class or series of capital stock of the Company that rank junior to the Preferred Stock will be subject to certain restrictions in the event that the Company does not declare and pay the full cumulative dividends on the Preferred Stock through the most recently completed quarterly dividend period.

Spire may, at its option, redeem the Preferred Stock (i) in whole, but not in part, at any time prior to August 15, 2024, within 120 days after a ratings event where a rating agency amends, clarifies or changes the criteria it uses to assign equity credit for securities such as the Preferred Stock, at a redemption price in cash equal to $25,500 per share, or (ii) in whole or in part, from time to time, on or after August 15, 2024, at a redemption price in cash equal to $25,000 per share, plus, in each case, all accumulated and unpaid dividends (whether declared or not) up to such redemption date.

Shareholders of the Preferred Stock generally have no voting rights with respect to matters that generally require the approval of voting stockholders. The limited voting rights of holders of the Preferred Stock include the right to vote on certain matters that may affect the preference or special rights of the Preferred Stock. In addition, if and whenever dividends on any shares of Preferred Stock have not been declared and paid for at least six dividend periods, whether or not consecutive, the number of directors then constituting Spire’s Board of Directors shall automatically be increased by two (to be elected by the holders of the Preferred Stock) until all accumulated and unpaid dividends on the Preferred Stock have been paid in full.

ATM Program

On February 6, 2019, Spire entered into an at-the-market (ATM) equity distribution agreement, supplemented as of May 14, 2019, pursuant to which the Company may offer and sell, from time to time, shares of its common stock having an aggregate offering price of up to $150.0. Proceeds from this program are intended to be used (i) to fund, in part, investments related to the construction of infrastructure and infrastructure improvements in the Utilities, as well as pipelines and storage, and (ii) for general corporate purposes, including repayment of short-term debt and the adjustment from time to time of the Company’s capital structure.

In the quarter ended June 30, 2019, Spire issued 59,630 shares under this program, generating $4.9 of proceeds net of issuance costs.