Reserve for Known and Incurred but Not Reported Claims (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Insurance [Abstract]
Provision for title loss, percentage of title premiums and escrow fees	8.90%	14.80%	7.50%	12.00%
Current quarter rate, expected ultimate loss, percentage	8.90%	14.80%
Ultimate loss rate	6.00%	5.80%
Estimated increase in loss reserve for prior policy years	$ 25.1	$ 89.0
Domestic Lender
Insurance [Abstract]
Estimated increase in loss reserve for prior policy years		58.7
Guaranteed Valuation Product
Insurance [Abstract]
Estimated increase in loss reserve for prior policy years		$ 12.9