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Segment Information - Summary of Reconciliation from Underlying Earnings Before Tax to Income Before Tax (Detail) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of reconciliation from underlying earnings before tax to income before tax [Line Items] |  |  |
Dividend income | € 1,571 | € 1,124 | € 1,164
Realized gains and (losses) on repurchased debt |  | 1 | 1
Other income | 200 | 8 | 540
Interest charges and related fees | 513 | 507 | 435
Other charges | (1) | (375) | (235)
Segment total [member] |  |  |
Disclosure of reconciliation from underlying earnings before tax to income before tax [Line Items] |  |  |
Underlying earnings before tax | 1,973 | 2,074 | 2,140
Elimination of share in earnings of joint ventures and associates | 50 | 72 | 61
Rental income | (76) | (72) | (61)
Dividend income | 9 | 30 |
Recovered claims and benefits |  | 2 |
Net fair value change of general account financial investments at fair value through profit or loss, other than derivatives | (17) | (295) | (437)
Net fair value change on borrowings and other financial liabilities | 7 | 6 |
Realized gains and losses on financial investments | 399 | (92) | 431
Gains and (losses) on investments in real estate | 317 | 261 | 193
Net fair value change of derivatives | 163 | (67) | (134)
Net foreign currency gains and (losses) |  | (2) | 5
Realized gains and (losses) on repurchased debt |  | 1 | 1
Other income | 200 | 8 | 540
Change in valuation of liabilities for insurance contracts | (1,231) | (341) | (254)
Change in valuation of liabilities for investment contracts | (13) | 13 | (19)
Benefits and claims paid life | 7 |  |
Policyholder claims and benefits - Other | 50 | (9) | 34
Commissions and expenses | (319) | (428) | 256
Impairment (charges) reversals | (105) | (20) | (16)
Interest charges and related fees | 21 |  |
Other charges | (1) | (375) | (235)
Run-off businesses | 23 | (14) | 30
Income / (loss) before tax | € 1,457 | € 751 | € 2,534

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