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Segment Information - Summary of Segment Results (Detail) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Summary of underlying earnings per segment [line items] |  |  |
Underlying earnings before tax | € 2,023 | € 2,146 | € 2,200
Fair value items | (689) | (409) | (16)
Realized gains / (losses) on investments | 403 | (79) | 408
Impairment charges | (95) | (58) | (46)
Impairment reversals | 73 | 39 | 32
Other income / (charges) | (281) | (874) | (72)
Run-off businesses | 23 | (14) | 30
Income/(loss) before tax | 1,457 | 751 | 2,534
Income tax (expense) / benefit | (218) | (40) | (65)
Net income / (loss) | 1,239 | 711 | 2,470
Revenues |  |  |
Life insurance gross premiums | 15,926 | 16,969 | 19,952
Accident and health insurance | 1,823 | 1,979 | 2,511
General insurance | 390 | 367 | 363
Total gross premiums | 18,138 | 19,316 | 22,826
Investment income | 7,531 | 7,035 | 7,338
Fee and commission income | 2,523 | 2,558 | 2,802
Other revenues | 6 | 5 | 7
Total revenues | 28,197 | 28,914 | 32,973
Segment total [member] |  |  |
Summary of underlying earnings per segment [line items] |  |  |
Underlying earnings before tax | 1,973 | 2,074 | 2,140
Fair value items | (601) | (291) | 81
Realized gains / (losses) on investments | 405 | (77) | 413
Impairment charges | (95) | (58) | (46)
Impairment reversals | 73 | 39 | 32
Other income / (charges) | (281) | (875) | (68)
Run-off businesses | 23 | (14) | 30
Income/(loss) before tax | 1,497 | 798 | 2,580
Income tax (expense) / benefit | (258) | (87) | (110)
Net income / (loss) | 1,239 | 711 | 2,470
Revenues |  |  |
Life insurance gross premiums | 16,617 | 17,548 | 20,498
Accident and health insurance | 1,872 | 2,015 | 2,531
General insurance | 512 | 479 | 466
Total gross premiums | 19,002 | 20,042 | 23,496
Investment income | 7,595 | 7,095 | 7,396
Fee and commission income | 2,740 | 2,782 | 2,990
Other revenues | 16 | 12 | 13
Total revenues | 29,352 | 29,930 | 33,895
Geographical Consolidation [member] | Asset management [member] |  |  |
Summary of underlying earnings per segment [line items] |  |  |
Underlying earnings before tax | 139 | 151 | 136
Realized gains / (losses) on investments |  | 2 | 3
Other income / (charges) | (7) | (5) | (49)
Income/(loss) before tax | 133 | 149 | 90
Income tax (expense) / benefit | (36) | (44) | (42)
Net income / (loss) | 97 | 105 | 48
Inter-segment underlying earnings | 193 | 198 | 214
Revenues |  |  |
Investment income | 5 | 5 | 4
Fee and commission income | 627 | 632 | 609
Other revenues | 1 | 1 |
Total revenues | 633 | 638 | 613
Inter-segment revenues | 187 | 206 | 222
Geographical Consolidation [member] | Americas [member] |  |  |
Summary of underlying earnings per segment [line items] |  |  |
Underlying earnings before tax | 1,124 | 1,216 | 1,381
Fair value items | 272 | (613) | 170
Realized gains / (losses) on investments | 125 | (204) | 157
Impairment charges | (54) | (46) | (37)
Impairment reversals | 68 | 37 | 22
Other income / (charges) | (156) | (397) | (353)
Run-off businesses | 23 | (14) | 30
Income/(loss) before tax | 1,401 | (20) | 1,370
Income tax (expense) / benefit | (220) | 71 | 198
Net income / (loss) | 1,182 | 51 | 1,568
Inter-segment underlying earnings | (61) | (73) | (78)
Revenues |  |  |
Life insurance gross premiums | 7,279 | 7,004 | 7,437
Accident and health insurance | 1,416 | 1,571 | 2,115
Total gross premiums | 8,694 | 8,575 | 9,553
Investment income | 3,172 | 3,125 | 3,368
Fee and commission income | 1,757 | 1,826 | 1,919
Other revenues | 8 | 5 | 5
Total revenues | 13,631 | 13,530 | 14,844
Inter-segment revenues | 1 | 1 |
Geographical Consolidation [member] | The Netherlands [member] |  |  |
Summary of underlying earnings per segment [line items] |  |  |
Underlying earnings before tax | 648 | 615 | 557
Fair value items | (741) | 250 | (31)
Realized gains / (losses) on investments | 240 | 46 | 184
Impairment charges | (30) | 4 | (3)
Impairment reversals | 5 | 2 | 10
Other income / (charges) | (1) | (132) | 296
Income/(loss) before tax | 121 | 784 | 1,013
Income tax (expense) / benefit | (27) | (136) | (196)
Net income / (loss) | 94 | 648 | 818
Inter-segment underlying earnings | (105) | (101) | (111)
Revenues |  |  |
Life insurance gross premiums | 1,765 | 1,632 | 1,857
Accident and health insurance | 228 | 219 | 203
General insurance | 130 | 136 | 148
Total gross premiums | 2,123 | 1,987 | 2,208
Investment income | 2,224 | 2,265 | 2,172
Fee and commission income | 237 | 211 | 326
Total revenues | 4,583 | 4,463 | 4,706
Inter-segment revenues | 12 | 2 | (1)
Geographical Consolidation [member] | United Kingdom [member] |  |  |
Summary of underlying earnings per segment [line items] |  |  |
Underlying earnings before tax | 139 | 128 | 116
Fair value items | (131) | 59 | (82)
Realized gains / (losses) on investments | 3 | 83 | 62
Other income / (charges) | (38) | (252) | 40
Income/(loss) before tax | (27) | 19 | 137
Income tax (expense) / benefit | (7) | 20 | (56)
Net income / (loss) | (34) | 38 | 81
Inter-segment underlying earnings | (87) | (82) | (87)
Revenues |  |  |
Life insurance gross premiums | 6,282 | 7,509 | 9,603
Accident and health insurance | 28 | 29 | 32
Total gross premiums | 6,309 | 7,539 | 9,635
Investment income | 1,830 | 1,346 | 1,517
Fee and commission income | 197 | 198 | 235
Total revenues | 8,337 | 9,083 | 11,387
Geographical Consolidation [member] | Southern & Eastern Europe [member] |  |  |
Summary of underlying earnings per segment [line items] |  |  |
Underlying earnings before tax | 88 | 96 | 71
Fair value items | 7 | 6 |
Realized gains / (losses) on investments | 27 |  | 1
Impairment charges |  | (2) | (2)
Impairment reversals |  | 1 |
Other income / (charges) | 33 | (26) |
Income/(loss) before tax | 155 | 76 | 70
Income tax (expense) / benefit | (19) | (19) | (15)
Net income / (loss) | 136 | 57 | 56
Inter-segment underlying earnings | (16) | (18) | (12)
Revenues |  |  |
Life insurance gross premiums | 552 | 622 | 619
Accident and health insurance | 110 | 102 | 84
General insurance | 382 | 343 | 319
Total gross premiums | 1,044 | 1,067 | 1,022
Investment income | 76 | 83 | 85
Fee and commission income | 50 | 63 | 60
Other revenues |  |  | 3
Total revenues | 1,171 | 1,213 | 1,170
Geographical Consolidation [member] | Asia [member] |  |  |
Summary of underlying earnings per segment [line items] |  |  |
Underlying earnings before tax | 62 | 55 | 49
Fair value items | (4) | 3 |
Realized gains / (losses) on investments | 9 | (8) | 4
Impairment charges | (1) | (5) | (1)
Impairment reversals | 1 |  |
Other income / (charges) | (18) | (7) | (19)
Income/(loss) before tax | 48 | 36 | 33
Income tax (expense) / benefit | (14) | (25) | (28)
Net income / (loss) | 33 | 11 | 5
Inter-segment underlying earnings | (4) | (5) | (1)
Revenues |  |  |
Life insurance gross premiums | 737 | 779 | 983
Accident and health insurance | 91 | 94 | 97
Total gross premiums | 828 | 873 | 1,080
Investment income | 303 | 268 | 246
Fee and commission income | 59 | 58 | 63
Other revenues | 1 | 2 | 1
Total revenues | 1,191 | 1,201 | 1,390
Inter-segment revenues |  |  | 3
Eliminations [member] |  |  |
Summary of underlying earnings per segment [line items] |  |  |
Underlying earnings before tax | 1 | 1 |
Income/(loss) before tax | 1 | 1 |
Net income / (loss) | 1 | 1 |
Revenues |  |  |
Life insurance gross premiums | (8) | (7) | (9)
General insurance | (1) | (1) | (1)
Total gross premiums | (9) | (8) | (10)
Investment income | (284) | (284) | (291)
Fee and commission income | (187) | (206) | (222)
Total revenues | (480) | (499) | (523)
Eliminations [member] | Holding and other activities [member] |  |  |
Summary of underlying earnings per segment [line items] |  |  |
Underlying earnings before tax | (228) | (189) | (170)
Fair value items | (4) | 5 | 24
Realized gains / (losses) on investments | 1 | 4 |
Impairment charges | (10) | (9) | (3)
Other income / (charges) | (95) | (57) | 16
Income/(loss) before tax | (335) | (247) | (134)
Income tax (expense) / benefit | 65 | 46 | 29
Net income / (loss) | (270) | (201) | (105)
Inter-segment underlying earnings | 79 | 80 | 73
Revenues |  |  |
Life insurance gross premiums | 11 | 9 | 7
General insurance | 1 | 1 | 1
Total gross premiums | 12 | 10 | 8
Investment income | 269 | 286 | 295
Other revenues | 5 | 4 | 4
Total revenues | 286 | 300 | 308
Inter-segment revenues | 280 | 290 | 298
Joint ventures and associates eliminations [member] |  |  |
Summary of underlying earnings per segment [line items] |  |  |
Underlying earnings before tax | 50 | 72 | 61
Fair value items | (88) | (119) | (97)
Realized gains / (losses) on investments | (2) | (2) | (5)
Impairment charges |  |  | 0
Other income / (charges) |  | 1 | (4)
Income/(loss) before tax | (40) | (47) | (45)
Income tax (expense) / benefit | 40 | 47 | 44
Net income / (loss) |  |  | 0
Revenues |  |  |
Life insurance gross premiums | (691) | (579) | (546)
Accident and health insurance | (50) | (36) | (20)
General insurance | (122) | (112) | (103)
Total gross premiums | (864) | (727) | (670)
Investment income | (64) | (59) | (58)
Fee and commission income | (218) | (224) | (188)
Other revenues | (10) | (6) | (5)
Total revenues | € (1,155) | € (1,016) | € (921)

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