Income Taxes (Details) $ in Millions	Jun. 22, 2020 USD ($)
Income Tax Disclosure [Abstract]
Reduction in deferred tax assets related to net operating losses	$ 24.4

Deferred Tax Assets, Operating Loss Carryforward, Reduction Due To Settlement

No definition available.

Name:	pins_DeferredTaxAssetsOperatingLossCarryforwardReductionDueToSettlement
Namespace Prefix:	pins_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration