Summary of Reserve for Claim Losses - Narrative (Details) $ in Millions					3 Months Ended
	Mar. 16, 2020 USD ($)	Mar. 06, 2020 USD ($)	Dec. 13, 2019 USD ($)	Oct. 22, 2019 USD ($)	Mar. 31, 2020 lawsuit
Loss Contingencies [Line Items]
Number of lawsuits | lawsuit					5
Pending Litigation | Ovation Fin. Holdings 2 LLC, Ovation Fund Mgmt. II, LLC, Banc of California, N.A. v. Chicago Title Ins. Co., Chicago Title Co., Case No. 3:19-cv-02031-GPC-KSC
Loss Contingencies [Line Items]
Plaintiffs claim losses amount				$ 75.0
Pending Litigation | Kim Funding, LLC, Kim H. Peterson, Joseph J. Cohen, and ABC Funding Strategies, LLC v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman
Loss Contingencies [Line Items]
Plaintiffs claim losses amount			$ 250.0
Pending Litigation | Wakefield Capital, LLC, Wakefield Investments, LLC, 2Budz Holding, LLC, Doug and Kristine Heidrich, and Jeff and Heidi Orr v. Chicago Title Co. and Chicago Title Ins. Co.
Loss Contingencies [Line Items]
Plaintiffs claim losses amount		$ 7.8
Pending Litigation | Randolph L. Levin, et al., v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, Betty Elixman, et al
Loss Contingencies [Line Items]
Plaintiffs claim losses amount	$ 38.0
Threatened Litigation
Loss Contingencies [Line Items]
Plaintiffs claim losses amount			$ 30.0