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Segment Information - Summary of Additional Information by Geographies (Parenthetical) (Detail) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Additional information by geographies [Line Items] |  |  |
Revenue | € 50,724 | € 51,980 | € 50,982
North America [Member] |  |  |
Additional information by geographies [Line Items] |  |  |
Revenue | 10,117 | 9,411 | 9,041
Latin America [Member] |  |  |
Additional information by geographies [Line Items] |  |  |
Revenue | € 5,963 | € 7,071 | € 6,979

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