Shareholders' Equity - Schedule of Share Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Globe Life Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Shares Acquired (in shares)	10,086	3,369	3,322
Total Cost	$ 945,637	$ 380,103	$ 335,145
Average Price (in dollars per share)	$ 93.76	$ 112.84	$ 100.90
Share Repurchase for Dilution Purposes
Equity, Class of Treasury Stock [Line Items]
Shares Acquired (in shares)	501	1,080	1,103
Total Cost	$ 48,026	$ 127,155	$ 119,493
Average Price (in dollars per share)	$ 95.75	$ 117.72	$ 108.33