Acquisitions - Pro Forma Information (Details) - F&G - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Business Acquisition [Line Items]
Total revenues	$ 124	$ 2,770	$ 2,596	$ 4,151	$ 4,848
Net earnings attributable to FNF common shareholders	$ (39)	$ 306	$ 271	$ 54	$ 581