Notes Payable - Schedule of Components of Notes Payable (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Debt Instrument
Principal	$ 2,270	$ 2,270
Debt issuance costs	(30)	(33)
Notes payable	2,240	2,237
Revolving Credit Facility - Short Term
Debt Instrument
Principal	0	0
Revolving Credit Facility - Short Term \| Credit Facility \| Revolving Credit Facility
Debt Instrument
Debt issuance costs	0	0
Notes payable	0	0
FNF Credit Facility - Short Term
Debt Instrument
Principal	0	0
FNF Credit Facility - Short Term \| Credit Facility \| Revolving Credit Facility
Debt Instrument
Debt issuance costs	0	0
Notes payable	$ 0	0
7.40% F&G Senior Notes, due 2028 \| Senior Notes
Debt Instrument
Interest rate, stated percentage	7.40%
Principal	$ 500	500
Debt issuance costs	(2)	(2)
Notes payable	$ 498	498
6.50% F&G Senior Notes, due 2029 \| Senior Notes
Debt Instrument
Interest rate, stated percentage	6.50%
Principal	$ 550	550
Debt issuance costs	(3)	(4)
Notes payable	$ 547	546
6.250% F&G Senior Notes, due 2034 \| Senior Notes
Debt Instrument
Interest rate, stated percentage	6.25%
Principal	$ 500	500
Debt issuance costs	(6)	(7)
Notes payable	$ 494	493
7.95% F&G Senior Notes, due 2053 \| Senior Notes
Debt Instrument
Interest rate, stated percentage	7.95%
Principal	$ 345	345
Debt issuance costs	(8)	(9)
Notes payable	$ 337	336
7.300% F&G Junior Notes, due 2065 \| Senior Notes
Debt Instrument
Interest rate, stated percentage	7.30%
Principal	$ 375	375
Debt issuance costs	(11)	(11)
Notes payable	$ 364	$ 364