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Shareholders' Equity
 6 Months Ended
Mar. 31, 2024
Equity [Abstract]  
Shareholders' Equity SHAREHOLDERS’ EQUITY
The following table summarizes the Company’s repurchases of its common stock.
Three Months Ended
March 31,		Six Months Ended
March 31,
2024202320242023
Shares repurchased
0.1 0.7 0.5 1.0 
Average price per share (a)$103.88 $88.59 $87.23 $87.47 
Total share repurchase costs
$8.1 $59.7 $44.8 $83.7 
(a)Average price per share excludes broker’s commissions, which are included in “Total share repurchase costs” within this table.
In February 2024, the Company entered into a structured share repurchase arrangement, which consisted of purchased call options with a $0 strike price per option and written call options with a $99.45 strike price per option. The Company paid $50.0 of net premiums in connection with the contract, which were recorded to “Additional paid-in capital” on the Condensed Consolidated Balance Sheets at March 31, 2024 and as “Payment for share repurchase contracts” in the Condensed Consolidated Statements of Cash Flows for the six months ended March 31, 2024. Upon settlement, the Company will have the right to receive approximately 0.5 shares of Post common stock, to be settled in shares or cash, at the option of the Company. The contract is expected to settle in the third quarter of fiscal 2024.