Related Party Transactions (Details) $ / shares in Units, shares in Thousands		3 Months Ended				6 Months Ended
	Mar. 23, 2026 USD ($) $ / shares shares	Jun. 30, 2026 director	Jun. 30, 2026 USD ($)	Mar. 31, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)
Related Party Transaction [Line Items]
Transaction costs			$ 9,172,000		$ 10,215,000	$ 33,321,000	$ 15,749,000
Janus Living, Inc | Related Party Management Fee
Related Party Transaction [Line Items]
Management fee, base amount						$ 10,000,000
Management base rate						0.50%
Management agreement term (in years)						3 years
Number of common directors | director		2
Janus Living, Inc | Related Party Management Fee | Gross book value level one
Related Party Transaction [Line Items]
Management base rate						0.50%
Investment threshold amount						$ 10,000,000,000.0
Fee reduction percentage						0.10%
Janus Living, Inc | Related Party Management Fee | Gross book value level two
Related Party Transaction [Line Items]
Management base rate						0.50%
Investment threshold amount						$ 20,000,000,000.0
Fee reduction percentage						0.15%
IPO | Related Party Management Fee
Related Party Transaction [Line Items]
Shares issued (in shares) | shares	216
Shares issue price (in dollars per share) | $ / shares	$ 20.00
Janus Living, Inc
Related Party Transaction [Line Items]
Transaction costs	$ 16,000,000			$ 16,000,000
Payments of stock issuance costs			$ 1,000,000	$ 8,000,000
Janus Living, Inc | Related Party Management Fee
Related Party Transaction [Line Items]
Management fee income						$ 3,500,000
Management fee income received in equity awards						288,000
Management fee income earned but not yet received						$ 27,000
Janus Living, Inc | IPO
Related Party Transaction [Line Items]
Payments of stock issuance costs	65,000,000
Stock-based compensation expense	$ 5,000,000