Acquisition-related Costs Textual (Details) - USD ($) $ in Millions	3 Months Ended
Feb. 29, 2020	Feb. 28, 2019
Business Acquisition [Line Items]
Acquisition-related costs	$ 0.9	$ 22.8
automotiveMastermind
Business Acquisition [Line Items]
Acquisition Related Cost Reserve - Long term portion	$ 29.7

Acquisition-related costs, including legal and other professional fees, associated with completed business combinations and asset acquisitions, including restructuring costs incurred directly as a result of acquisition activities.

No definition available.

Name:	info_AcquisitionRelatedCosts
Namespace Prefix:	info_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration