Leases - Summary of Reconciliation of Lease Liabilities Related to Lease Commitments (Details) - EUR (€) € in Millions	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Disclosure Of Lease Commitments I F R S16 Leases [Abstract]
Total lease commitments as of December 31, 2018	€ 985	€ 833
Impact of discounting remaining lease payments	324	(285)
Recognition exemption for short-term leases		(7)
Total lease liabilities included in the consolidated statement of financial position at January 1, 2019	629	541
Current	7	20
Lease liabilities	€ 622	€ 521	€ 0

Disclosure of future minimum lease payment payable under non-cancellable leases accounted under IFRS16.

No definition available.

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- Definition

Discount impact for remaining lease payments.

+ References

No definition available.

+ Details

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- Definition

The amount of future minimum lease payment payable under non-cancellable leases accounted under IFRS16.

+ References

No definition available.

+ Details

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- Definition

The amount of current lease liabilities. [Refer: Lease liabilities]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 47
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2019-03-27

+ Details

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- Definition

The amount of the lease commitments for short-term leases accounted for applying paragraph 6 of IFRS 16. Short-term lease is a lease that, at the commencement date, has a lease term of 12 months or less. A lease that contains a purchase option is not a short-term lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard
-URIDate 2019-03-27

+ Details

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- Definition

The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

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+ Details

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- Definition

The amount of non-current lease liabilities. [Refer: Lease liabilities]

+ References

+ Details

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