Other items from operating activities - Loans and advances, valuation allowance (Details) - Loans and advances - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of changes in allowance account for credit losses of financial assets [abstract]
Valuation allowance as of the beginning of the period	$ (286)	$ (280)	$ (672)
Increases	(50)	(15)	(62)
Decreases	11	7	393
Currency translation adjustment and other variations	(34)	2	61
Valuation allowance as of the end of the period	$ (359)	$ (286)	$ (280)

The amount of additional allowance for credit losses of financial assets recognised in profit or loss. [Refer: Allowance account for credit losses of financial assets]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2018-01-01
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 16
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_16&doctype=Standard&book=B
-URIDate 2017-03-09

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2018-01-01
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 16
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_16&doctype=Standard&book=B
-URIDate 2017-03-09

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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- Definition

The increase (decrease) in an allowance account for credit losses of financial assets resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity, and from changes that the entity does not separately disclose in the same statement or note.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

The decrease in an allowance account for credit losses of financial assets resulting from the utilisation of the allowance and reversal of impairment.

+ References

No definition available.

+ Details

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Namespace Prefix:	tot_
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