Interim financial statements - Merger Agreement (Details) - FNF	Mar. 18, 2018 extension
Business Acquisition [Line Items]
Number of extensions per merger agreement	2
Extension period for merger agreement	3 months

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration