Purchases and other expenses - Trade payables - Additional information (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Purchases and other expenses [abstract]
Extension period of payment	6 months
Impact on the change in working capital requirement	€ 526	€ 310	€ 300

The amount of impact on the change in working capital requirement due to the extension for trade payables and fixed asset payables.

No definition available.

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