The number of dilutive potential ordinary shares that relate to the assumed conversion of the entity's convertible instruments.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 33
-IssueDate 2017-01-01
-Paragraph 70
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=33&date=2017-03-01&anchor=para_70_b&doctype=Standard
-URIDate 2017-03-09

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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- Definition

The number of instruments or interests issued or issuable at acquisition date for equity interests of the acquirer transferred as consideration in a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2017-01-01
-Paragraph B64
-Subparagraph f
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B64_f_iv&doctype=Appendix&seq=2
-URIDate 2017-03-09

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Securities which contingency condition not met that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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- Definition

Amount of debt that was redeemed.

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- Definition

The number of dilutive potential ordinary shares that relate to the assumed conversion of the American Depositary Shares..

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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- Definition

The number of instruments or interests acquired at acquisition date in exchange for instruments issued.

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Earnings per share - Additional Information (Details) € in Millions	10 Months Ended	12 Months Ended
	Dec. 31, 2016 EUR (€) shares	Dec. 31, 2017 shares	Dec. 31, 2016 EUR (€) shares	Dec. 31, 2015 EUR (€) shares	May 10, 2016 EquityInstruments	May 09, 2016 shares
Earnings per share [line items]
Assumed conversion of convertible bonds				268,975,000
Alcatel Lucent American Depositary Shares			8,746,000
Alcatel Lucent
Earnings per share [line items]
Number of shares acquired						107,775,949
Depositary in settlement of the transaction \| EquityInstruments					59,276,772
Alcatel Lucent American Depositary Shares	9,000,000
750 convertible bonds
Earnings per share [line items]
Assumed conversion of convertible bonds			269,000,000
Debt redeemed \| €	€ 750		€ 750	€ 750
Restricted Shares
Earnings per share [line items]
Antidilutive share equivalents excluded (in shares)		5,000,000	5,000,000	0
Performance Shares
Earnings per share [line items]
Antidilutive share equivalents excluded (in shares)		14,000,000	10,000,000	0
Antidilutive contingent performance shares (in shares)		3,000,000	4,000,000	4,000,000
Maximum \| Stock Option
Earnings per share [line items]
Antidilutive share equivalents excluded (in shares)		1,000,000	1,000,000	1,000,000