Shareholders' Equity - Narrative (Details) - USD ($) |
6 Months Ended | ||
---|---|---|---|
Mar. 31, 2021 |
Mar. 31, 2020 |
Feb. 11, 2020 |
|
Class of Stock [Line Items] | |||
Net proceeds from equity offering | $ 460,678,000 | $ 258,047,000 | |
Net proceeds available | $ 115,600,000 | ||
Forward Price (dollars per share) | $ 90.96 | ||
Shelf Registration Statement | |||
Class of Stock [Line Items] | |||
Debt and equity securities authorized for issuance | $ 4,000,000,000.0 | ||
Debt and equity securities authorized for issuance value remaining | $ 200,000,000 | ||
At-The-Market | |||
Class of Stock [Line Items] | |||
Forward sales equity agreement (in shares) | 2,472,912 | ||
Stock issued during period, new issues (in shares) | 4,537,669 | ||
Net proceeds from equity offering | $ 460,700,000 | ||
Equity available for issuance | 313,000,000 | ||
Net proceeds available | $ 238,600,000 |