Sales - Trade receivables - Allowances reconciliation - Additional information (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Revenue [abstract]
Change in IFRS 9 provision	€ (2)	€ (3)

Additional allowance recognised in profit or loss, allowance for trade receivables, change in IFRS 9 provision

No definition available.

Name:	oran_AdditionalAllowanceRecognisedInProfitOrLossAllowanceForTradeReceivablesChangeInIfrs9Provision
Namespace Prefix:	oran_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration