Purchases and other expenses - External purchases components - Additional Information (Details) - EUR (€)	Dec. 31, 2019	Jan. 01, 2019
Purchases and other expenses [abstract]
New value of the underlying asset, maximum	€ 5,000	€ 5,000,000,000

The maximum amount of replacement value of leased assets with residual term expiring within 12 months of the application date, that has been excluded from lease liabilities by the company .

No definition available.

Name:	oran_LeaseCommitmentsForShortTermLeasesForWhichRecognitionExemptionHasBeenUsedReplacementValueMaximum
Namespace Prefix:	oran_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant