Employee benefits - Actuarial assumptions - General information (Details)	12 Months Ended
Dec. 31, 2019
Disclosure of sensitivity analysis for actuarial assumptions [abstract]
Percentage of discount rate used for euro zone	87.00%
French part-time for seniors plans [member]
Disclosure of sensitivity analysis for actuarial assumptions [abstract]
Average sign-up rate (as a percent)	70.00%

The percentage of entity's pension and other long-term employee benefit obligations discount rates used for the euro zone.

No definition available.

Name:	oran_PercentageOfPensionAndOtherLongTermEmployeeBenefitObligationsDiscountRatesUsedForEuroZone
Namespace Prefix:	oran_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration