| Cover page | Jan. 30, 2025 | Oct. 17, 2024 |
| Document Information [Line Items] | ||
| Document Type | 8-K/A | 8-K/A |
| Entity Registrant Name | GLOBE LIFE INC. | |
| Entity Incorporation, State or Country Code | DE | |
| Entity File Number | 001-08052 | |
| Entity Tax Identification Number | 63-0780404 | |
| Entity Address, Address Line One | 3700 South Stonebridge Drive | |
| Entity Address, City or Town | McKinney | |
| Entity Address, State or Province | TX | |
| Entity Address, Postal Zip Code | 75070 | |
| City Area Code | 972 | |
| Local Phone Number | 569-4000 | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Entity Emerging Growth Company | false | |
| Entity Central Index Key | 0000320335 | |
| Amendment Flag | false | |
| Document Period End Date | Oct. 17, 2024 | |
| Common Stock, $1.00 par value per share | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | Common Stock, $1.00 par value per share | |
| Trading Symbol | GL | |
| Security Exchange Name | NYSE | |
| 4.250% Junior Subordinated Debentures | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | 4.250% Junior Subordinated Debentures | |
| Trading Symbol | GL PRD | |
| Security Exchange Name | NYSE |
