Taxes - Income tax - Net deferred tax - Additional information (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Major components of tax expense (income) [abstract]
Deferred tax expense of discontinued operations	€ 0	€ 0	€ (17)

The deferred tax expense relating to the profit (loss) arising from ordinary activities of discontinued operations.

No definition available.

Name:	oran_DeferredTaxExpenseRelatingToProfitLossFromOrdinaryActivitiesOfDiscontinuedOperations
Namespace Prefix:	oran_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration