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Policyholder Claims and Benefits - Summary of Policyholder Claims and Benefits (Detail) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of detail information about policyholder claims and benefits paid [line items] |  |  |
Change in valuation of liabilities for insurance contracts | € 30,620 | € (2,639) | € 22,741
Other | (50) | 9 | (34)
Total | 56,797 | 10,557 | 45,599
Life insurance general account [member] |  |  |
Disclosure of detail information about policyholder claims and benefits paid [line items] |  |  |
Benefits and claims paid life | 18,824 | 19,673 | 23,634
Non-life insurance [member] |  |  |
Disclosure of detail information about policyholder claims and benefits paid [line items] |  |  |
Benefits and claims paid life | 1,635 | 1,658 | 1,903
Investment contracts 1 [member] |  |  |
Disclosure of detail information about policyholder claims and benefits paid [line items] |  |  |
Change in valuation of liabilities for investment contracts | € 5,768 | € (8,143) | € (2,644)

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