Shareholders' Equity - Share Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Globe Life Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Shares Acquired (in shares)	3,369	3,322	4,784
Total Cost	$ 380,103	$ 335,145	$ 455,030
Average Price (in dollars per share)	$ 112.84	$ 100.90	$ 95.11
Share Repurchase for Dilution Purposes
Equity, Class of Treasury Stock [Line Items]
Shares Acquired (in shares)	1,080	1,103	858
Total Cost	$ 127,155	$ 119,493	$ 86,405
Average Price (in dollars per share)	$ 117.72	$ 108.33	$ 100.75