Shareholders' equity and share-based payments - Employee reserved capital increases (Details) - Capital increase reserved for employees	12 Months Ended
Dec. 31, 2017 item
Share-based payments
Period over which shares may not be transferred	5 years
Number of steps in valuation method of non transferability of the shares	2
Forward sale period	5 years

The period of forward sale of the nontransferable shares used in the valuation method to determine the cost of employee-reserved capital increases , in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	tot_PeriodOfForwardSaleInValuationMethodOfNonTransferabilityOfShares
Namespace Prefix:	tot_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration