Shareholders' equity - Subordinated notes - Additional information (Details) € in Millions	12 Months Ended
Dec. 31, 2019 EUR (€)
IFRS Subordinated Debt [Member]
Disclosure of detailed information about borrowings [line items]
Tax effect of conversion of subordinated notes denominated in pounds sterling	€ 25

The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) for the conversion of instruments included in equity whose face value is denominated in another currency.

No definition available.

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