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Significant accounting policies - Detail Of Lease Commitments Reconciliation With Lease Liabilities (Detail) - EUR (€)
€ in Millions
Dec. 31, 2019
Jan. 01, 2019
Disclosure of changes in accounting estimates [abstract]    
Operating lease commitments at December 31, 2018 as per the consolidated annual financial statements   € 386
Discounted using the incremental borrowing rate at January 1, 2019   302
Short term leases   (7)
Extenstion and termination options reasonably certain to be exercised   (4)
Exclusion of non-lease components   (6)
Lease liabilities recognized at January 1, 2019 € 311 € 285