Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Fixed maturity securities, amortized cost	$ 23,010,899	$ 20,915,245
Fixed maturity securities, allowance for credit loss	671	36,751
Financing receivable, allowance for credit loss	1,114	3,004
Premium receivable, allowance for credit loss	39,884	35,110
Uncollectible reinsurance	$ 8,350	$ 8,404
Preferred stock, par value (in dollars per share)	$ 0.10	$ 0.10
Preferred stock, authorized (in shares)	5,000,000	5,000,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.20	$ 0.20
Common stock, issued (in shares)	380,066,070	384,817,136
Common stock, outstanding (in shares)	380,066,070	384,817,136
Common stock, authorized (in shares)	1,250,000,000
Treasury stock, at cost (in shares)	413,455,739	408,704,807