Accumulated Other Comprehensive Loss (Income) (Details) $ in Millions	Jun. 30, 2020 USD ($)
Stockholders' Equity Note [Abstract]
Change in fair value of discontinued hedging instruments	$ 0.9
Currently active hedging instruments	$ 2.1

Amount of change in fair value of discontinued hedging instruments.

No definition available.

Name:	inse_ChangeInFairValueOfDiscontinuedHedgingInstruments
Namespace Prefix:	inse_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant