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Commitments and Contingencies - Summary of Future Minimum Lease Payments under Non-cancellable Operating Leases (Detail) - EUR (€) € in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Not later than 1 year [member] | Operating lease obligations [member] |  |
Disclosure of finance lease and operating lease by lessee [Line Items] |  |
Operating leases |  | € 73
Not later than 1 year [member] | Operating lease rights [member] |  |
Disclosure of finance lease and operating lease by lessee [Line Items] |  |
Operating leases | € 49 | 50
Later than one year and not later than two years [member] | Operating lease rights [member] |  |
Disclosure of finance lease and operating lease by lessee [Line Items] |  |
Operating leases | 42 |
Later than two years and not later than three years [member] | Operating lease rights [member] |  |
Disclosure of finance lease and operating lease by lessee [Line Items] |  |
Operating leases | 32 |
Later than three years and not later than four years [member] | Operating lease rights [member] |  |
Disclosure of finance lease and operating lease by lessee [Line Items] |  |
Operating leases | 26 |
Later than four years and not later than five years [member] | Operating lease rights [member] |  |
Disclosure of finance lease and operating lease by lessee [Line Items] |  |
Operating leases | 19 |
1-5 years [member] | Operating lease obligations [member] |  |
Disclosure of finance lease and operating lease by lessee [Line Items] |  |
Operating leases |  | 144
1-5 years [member] | Operating lease rights [member] |  |
Disclosure of finance lease and operating lease by lessee [Line Items] |  |
Operating leases |  | 127
Later than 5 years [member] | Operating lease obligations [member] |  |
Disclosure of finance lease and operating lease by lessee [Line Items] |  |
Operating leases |  | 169
Later than 5 years [member] | Operating lease rights [member] |  |
Disclosure of finance lease and operating lease by lessee [Line Items] |  |
Operating leases | € 47 | € 52

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- Definition Lease payments payable under non cancellable operating lease. + References No definition available. + Details
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