Debt - Principal Terms of Senior and Junior Subordinated Notes (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 11, 2025
Senior notes | 2030 Senior Notes
Debt Instrument [Line Items]
Par value	$ 350.0
Stated coupon	3.30%
Effective interest rate	3.39%
Senior notes | 2034 Senior Notes
Debt Instrument [Line Items]
Par value	$ 400.0
Stated coupon	5.50%
Effective interest rate	5.64%
Senior notes | 2036 Senior Notes
Debt Instrument [Line Items]
Par value	$ 425.0	$ 425.0
Stated coupon	5.50%
Effective interest rate	5.60%
Junior subordinated notes | 2059 Junior Subordinated Notes
Debt Instrument [Line Items]
Par value	$ 300.0
Stated coupon	5.875%
Effective interest rate	5.91%
Junior subordinated notes | 2060 Junior Subordinated Notes
Debt Instrument [Line Items]
Par value	$ 275.0
Stated coupon	4.75%
Effective interest rate	4.78%
Junior subordinated notes | 2061 Junior Subordinated Notes
Debt Instrument [Line Items]
Par value	$ 200.0
Stated coupon	4.20%
Effective interest rate	4.23%
Junior subordinated notes | 2064 Junior Subordinated Notes
Debt Instrument [Line Items]
Par value	$ 450.0
Stated coupon	6.75%
Effective interest rate	6.76%