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Equity - Common Stock Share Activity (Details) - shares | 12 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020
Class of Stock [Line Items] |  |  |
Beginning balance - shares Issued (in shares) | 220,000 | 0 |
Ending balance - shares Issued (in shares) |  | 220,000 | 0
Ending balance - shares outstanding (in shares) | 0 | 0 |
Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Equity Unit offering (in shares) |  | 220,000 |
Ending balance - shares Issued (in shares) | 220,000 |  |
Ending balance - shares outstanding (in shares) | 220,000 | 220,000 | 0
Common Stock |  |  |
Class of Stock [Line Items] |  |  |
Beginning balance - shares Issued (in shares) | 209,843,296 | 209,514,044 | 209,304,129
Beginning balance - shares Outstanding (in shares) | 209,216,135 | 208,354,438 | 209,004,789
Employee and director plans - shares Issued/Treasury (in shares) | 717,198 | 329,252 | 209,915
Treasury stock acquired (in shares) | 900,000 | 0 | 950,000
Reacquired common stock – employee and director plans | (250,273) | (21,870) | (90,316)
Ending balance - shares Issued (in shares) | 210,560,494 | 209,843,296 | 209,514,044
Ending balance - shares Outstanding (in shares) | 209,582,212 | 209,216,135 | 208,354,438
Employee and director plans - shares Outstanding (in shares) | 1,516,350 | 883,567 | 389,965
Common Stock | Treasury stock |  |  |
Class of Stock [Line Items] |  |  |
Beginning balance - shares Outstanding (in shares) | (627,161) | (1,159,606) | (299,340)
Employee and director plans - shares Issued/Treasury (in shares) | 799,152 | 554,315 | 180,050
Treasury stock acquired (in shares) | 900,000 |  | 950,000
Reacquired common stock – employee and director plans | (250,273) | (21,870) | (90,316)
Ending balance - shares Outstanding (in shares) | (978,282) | (627,161) | (1,159,606)

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- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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