The cash outflow to acquire an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among myriad other features and characteristics.

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Collaborative Investments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
Collaborative Investments (Details) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Net Investment Income [Line Items]
Credit loss on note receivable from collaborative partner	$ 0.0	$ 0.0	$ 7.7	$ 0.0
Convertible Promissory Note
Net Investment Income [Line Items]
Payments to acquire notes receivable					$ 7.2	$ 7.2
Credit loss on note receivable from collaborative partner			$ 7.7