Shareholders' Equity - Share Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Globe Life Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Shares Acquired (in shares)	4,784	4,459	3,932
Total Cost	$ 455,030	$ 380,112	$ 350,080
Average Price (in dollars per share)	$ 95.11	$ 85.24	$ 89.04
Share Repurchase for Dilution Purposes
Equity, Class of Treasury Stock [Line Items]
Shares Acquired (in shares)	858	676	1,209
Total Cost	$ 86,405	$ 63,754	$ 109,489
Average Price (in dollars per share)	$ 100.75	$ 94.28	$ 90.52