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Treasury Risk Management - Summary of Financial Liabilities are Subject to Offsetting, Enforceable Master Netting Arrangements and Similar Agreements (Detail) - Derivative financial liabilities [Member] - EUR (€) € in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of offsetting of financial liabilities [line items]
Gross amounts of recognised financial liabilities	€ (566)	€ (371)
Gross amounts of recognised financial liabilities set off in the balance sheet	148	45
Net amounts of financial liabilities presented in the balance sheet	(418)	(326)
Financial instruments	91	130
Cash collateral pledged
Net amount	€ (327)	€ (196)

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- Definition

The amount of cash collateral pledged that is subject to an enforceable master netting arrangement or similar agreement and that is not set off against financial liabilities. [Refer: Financial liabilities]

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The amount of financial instruments subject to an enforceable master netting arrangement or similar agreement that are not set off against financial liabilities. [Refer: Financial liabilities]

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The gross amount of recognised financial liabilities that are subject either to offsetting or to an enforceable master netting arrangement or similar agreement. [Refer: Financial liabilities]

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The amount remaining after deducting the amounts subject to an enforceable master netting arrangement or similar agreement that were not set off against financial liabilities, from the net amount of financial liabilities subject to offsetting or subject to an enforceable master netting arrangement or similar agreement presented in the statement of financial position.

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The net amount of financial liabilities that are subject either to offsetting or to an enforceable master netting arrangement or similar agreement, presented in the statement of financial position. [Refer: Financial liabilities]

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