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No definition available.

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The amount of future minimum lease payments payable under non-cancellable operating leases. Minimum lease payments are payments over the lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with: (a) for a lessee, any amounts guaranteed by the lessee or by a party related to the lessee; or (b) for a lessor, any residual value guaranteed to the lessor by: (i) the lessee; (ii) a party related to the lessee; or (iii) a third party unrelated to the lessor that is financially capable of discharging the obligations under the guarantee.

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A component of equity representing the entity's cumulative undistributed earnings or deficit.

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Prepayment received related to a mutual patent license agreement.

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Significant accounting policies - New standards (Details) - EUR (€) € in Millions	1 Months Ended	12 Months Ended
	Apr. 30, 2014	Dec. 31, 2017	Jan. 01, 2018	Dec. 31, 2016
Disclosure of initial application of standards or interpretations [line items]
Minimum lease payments payable under non-cancellable operating lease		€ 961
Summary of adjustments
Retained earnings		€ 1,147		€ 3,588
Reclassification of contract assets and liabilities
Summary of adjustments
Retained earnings			€ (25)
Microsoft agreement
Disclosure of initial application of standards or interpretations [line items]
Term of non-exclusive license to patents	10 years	10 years
Prepayment related to mutual patent license agreement		€ 980