Business segment information - Segments (Details)	12 Months Ended
Dec. 31, 2019 segment
Business segment information
Number of business segments	4

An operating segment is a component of an entity: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same entity); (b) whose operating results are regularly reviewed by the entity's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance; and (c) for which discrete financial information is available.

No definition available.

Name:	tot_NumberOfBusinessSegments
Namespace Prefix:	tot_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration