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Stockholders' equity - ATM common stock offering program and Forward Equity Sales Agreements (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	Jun. 25, 2024	Jun. 30, 2024	Feb. 15, 2024
Class of Stock
Shares of common stock authorized		400,000
ATM Common Stock Offering Program. Established February 2024
Class of Stock
Common stock available for future issuance (in dollars)		$ 1,470.0	$ 1,500.0
ATM Common Stock Offering Program. Established February 2024 | Forward Equity Sales Agreements Entered in June 2024
Class of Stock
Proceeds from issuance of common stock	$ 27.8
Shares of common stock authorized	230
Average issue price per share	$ 122.32

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