Class N Redeemable Common Stock - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2022
Class of Stock [Line Items]
Increase (decrease) to redeemable common stock	$ (10.9)		$ (27.7)
Increase (decrease) to additional paid In capital	$ 10.9		$ 27.7
MassMutual | Class N Common Stock | Affiliated entity
Class of Stock [Line Items]
Share repurchase, minimum repurchase amount		$ 50.0
Stock redemption terms		3 years
MassMutual | Class N Common Stock | Private Offering | Affiliated entity
Class of Stock [Line Items]
Capital commitment				$ 400.0
Shares repurchase amount, maximum		$ 200.0
MassMutual | Redeemable Common Stock | Affiliated entity
Class of Stock [Line Items]
Share of entity's stock, minimum net asset value		$ 20.0