Discontinued operations - Summary of movement schedules by measurement component (Detail) - EUR (€)
€ in Millions |
6 Months Ended |
12 Months Ended |
Jun. 30, 2026 |
Dec. 31, 2025 |
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Opening net balance |
€ 176,049
|
|
| Net opening balance, Investment contracts |
21,281
|
€ 22,332
|
| Variable Fee Approach [Abstract] |
|
|
| Closing net balance |
137,391
|
176,049
|
| Net closing balance, Investment contracts |
20
|
21,281
|
| Insurance contracts other than those to which premium allocation approach has been applied [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Opening net balance |
176,006
|
|
| Variable Fee Approach [Abstract] |
|
|
| Closing net balance |
137,341
|
176,006
|
| Insurance contracts other than those to which premium allocation approach has been applied [member] | Insurance contracts issued [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Opening net balance |
176,006
|
188,193
|
| Changes in estimates that adjust contractual service margin |
0
|
0
|
| Changes in estimates that adjust onerous contracts |
859
|
1,098
|
| Changes that relate to future service |
888
|
1,139
|
| Earnings released from contractual service margin |
(431)
|
(930)
|
| Release of risk adjustment |
(132)
|
(278)
|
| Revenue recognised for incurred policyholder tax expenses |
(618)
|
(780)
|
| Changes that relate to current service |
3
|
(11)
|
| Insurance service result |
270
|
361
|
| General Model [Abstract] |
|
|
| Interest accreted to insurance contracts |
1,493
|
3,021
|
| Variable Fee Approach [Abstract] |
|
|
| Change in fair value of the underlying assets |
4,309
|
14,316
|
| Change in fulfilment value - risk mitigation option |
(616)
|
(836)
|
| Insurance finance income / (expenses) |
5,334
|
18,143
|
| Premiums received |
6,651
|
14,405
|
| Claims, benefits and expenses paid |
(11,240)
|
(24,576)
|
| Cash flows |
(5,238)
|
(11,326)
|
| Net exchange differences |
3,946
|
(19,358)
|
| Closing net balance |
137,341
|
176,006
|
| Insurance contracts other than those to which premium allocation approach has been applied [member] | Investment contracts with DPF [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Net opening balance, Investment contracts |
21,281
|
22,332
|
| Changes in estimates that adjust contractual service margin |
0
|
0
|
| Changes in estimates that adjust onerous contracts |
(1)
|
2
|
| Changes that relate to future service |
(1)
|
2
|
| Earnings released from contractual service margin |
(9)
|
(37)
|
| Release of risk adjustment |
(4)
|
(14)
|
| Changes that relate to current service |
(13)
|
(47)
|
| Insurance service result |
(13)
|
(45)
|
| Variable Fee Approach [Abstract] |
|
|
| Change in fair value of the underlying assets of products with direct participating features |
(441)
|
2,916
|
| Insurance finance income / (expenses) |
(440)
|
2,916
|
| Premiums received |
106
|
413
|
| Claims, benefits and expenses paid |
(848)
|
(3,157)
|
| Cash flows |
(746)
|
(2,744)
|
| Net exchange differences |
133
|
(1,177)
|
| Net closing balance, Investment contracts |
20
|
21,281
|
| BEL [Member] | Insurance contracts other than those to which premium allocation approach has been applied [member] | Insurance contracts issued [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Opening net balance |
164,430
|
175,611
|
| Changes in estimates that adjust contractual service margin |
(27)
|
(371)
|
| Changes in estimates that adjust onerous contracts |
717
|
1,069
|
| Changes that relate to future service |
241
|
(65)
|
| Earnings released from contractual service margin |
0
|
0
|
| Release of risk adjustment |
0
|
0
|
| Revenue recognised for incurred policyholder tax expenses |
(55)
|
428
|
| Changes that relate to current service |
3
|
(11)
|
| Insurance service result |
186
|
364
|
| General Model [Abstract] |
|
|
| Interest accreted to insurance contracts |
1,301
|
2,654
|
| Variable Fee Approach [Abstract] |
|
|
| Change in fair value of the underlying assets |
4,309
|
14,316
|
| Change in fulfilment value - risk mitigation option |
(616)
|
(836)
|
| Insurance finance income / (expenses) |
5,145
|
17,770
|
| Premiums received |
6,651
|
14,405
|
| Claims, benefits and expenses paid |
(11,240)
|
(24,576)
|
| Cash flows |
(5,238)
|
(11,326)
|
| Net exchange differences |
3,651
|
(17,981)
|
| Closing net balance |
126,659
|
164,430
|
| BEL [Member] | Insurance contracts other than those to which premium allocation approach has been applied [member] | Investment contracts with DPF [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Net opening balance, Investment contracts |
20,940
|
21,987
|
| Changes in estimates that adjust contractual service margin |
24
|
(66)
|
| Changes in estimates that adjust onerous contracts |
(1)
|
2
|
| Changes that relate to future service |
22
|
(64)
|
| Earnings released from contractual service margin |
0
|
0
|
| Release of risk adjustment |
0
|
0
|
| Changes that relate to current service |
0
|
4
|
| Insurance service result |
22
|
(60)
|
| Variable Fee Approach [Abstract] |
|
|
| Change in fair value of the underlying assets of products with direct participating features |
(441)
|
2,916
|
| Insurance finance income / (expenses) |
(440)
|
2,916
|
| Premiums received |
106
|
413
|
| Claims, benefits and expenses paid |
(848)
|
(3,157)
|
| Cash flows |
(746)
|
(2,744)
|
| Net exchange differences |
131
|
(1,159)
|
| Net closing balance, Investment contracts |
15
|
20,940
|
| RA [member] | Insurance contracts other than those to which premium allocation approach has been applied [member] | Insurance contracts issued [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Opening net balance |
3,169
|
3,618
|
| Changes in estimates that adjust contractual service margin |
(70)
|
(78)
|
| Changes in estimates that adjust onerous contracts |
143
|
29
|
| Changes that relate to future service |
162
|
86
|
| Earnings released from contractual service margin |
0
|
0
|
| Release of risk adjustment |
(132)
|
(278)
|
| Revenue recognised for incurred policyholder tax expenses |
(132)
|
(278)
|
| Changes that relate to current service |
0
|
0
|
| Insurance service result |
30
|
(191)
|
| General Model [Abstract] |
|
|
| Interest accreted to insurance contracts |
62
|
141
|
| Variable Fee Approach [Abstract] |
|
|
| Change in fair value of the underlying assets |
0
|
0
|
| Change in fulfilment value - risk mitigation option |
0
|
0
|
| Insurance finance income / (expenses) |
59
|
148
|
| Premiums received |
0
|
0
|
| Claims, benefits and expenses paid |
0
|
0
|
| Cash flows |
0
|
0
|
| Net exchange differences |
85
|
(405)
|
| Closing net balance |
3,126
|
3,169
|
| RA [member] | Insurance contracts other than those to which premium allocation approach has been applied [member] | Investment contracts with DPF [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Net opening balance, Investment contracts |
97
|
112
|
| Changes in estimates that adjust contractual service margin |
(4)
|
5
|
| Changes in estimates that adjust onerous contracts |
0
|
0
|
| Changes that relate to future service |
(4)
|
5
|
| Earnings released from contractual service margin |
0
|
0
|
| Release of risk adjustment |
(4)
|
(14)
|
| Changes that relate to current service |
(4)
|
(14)
|
| Insurance service result |
(7)
|
(10)
|
| Variable Fee Approach [Abstract] |
|
|
| Change in fair value of the underlying assets of products with direct participating features |
0
|
0
|
| Insurance finance income / (expenses) |
0
|
0
|
| Premiums received |
0
|
0
|
| Claims, benefits and expenses paid |
0
|
0
|
| Cash flows |
0
|
0
|
| Net exchange differences |
1
|
(6)
|
| Net closing balance, Investment contracts |
0
|
97
|
| CSM [member] | Insurance contracts issued [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Opening net balance |
8,406
|
8,964
|
| Transfers to disposal groups |
(1,244)
|
|
| Changes in estimates that adjust contractual service margin |
96
|
449
|
| Earnings released from contractual service margin |
(431)
|
(930)
|
| Variable Fee Approach [Abstract] |
|
|
| Insurance finance income / (expenses) |
130
|
226
|
| Net exchange differences |
210
|
(972)
|
| Closing net balance |
7,556
|
8,406
|
| CSM [member] | Investment contracts with DPF [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Opening net balance |
245
|
233
|
| Changes in estimates that adjust contractual service margin |
(20)
|
61
|
| Earnings released from contractual service margin |
(9)
|
(37)
|
| Variable Fee Approach [Abstract] |
|
|
| Insurance finance income / (expenses) |
0
|
|
| Net exchange differences |
2
|
(13)
|
| Closing net balance |
4
|
245
|
| CSM [member] | Insurance contracts other than those to which premium allocation approach has been applied [member] | Insurance contracts issued [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Opening net balance |
8,406
|
8,964
|
| Changes in estimates that adjust contractual service margin |
96
|
449
|
| Changes in estimates that adjust onerous contracts |
0
|
0
|
| Changes that relate to future service |
486
|
1,118
|
| Earnings released from contractual service margin |
(431)
|
(930)
|
| Release of risk adjustment |
0
|
0
|
| Revenue recognised for incurred policyholder tax expenses |
(431)
|
(930)
|
| Changes that relate to current service |
0
|
0
|
| Insurance service result |
54
|
189
|
| General Model [Abstract] |
|
|
| Interest accreted to insurance contracts |
130
|
226
|
| Variable Fee Approach [Abstract] |
|
|
| Change in fair value of the underlying assets |
0
|
0
|
| Change in fulfilment value - risk mitigation option |
0
|
0
|
| Insurance finance income / (expenses) |
130
|
226
|
| Premiums received |
0
|
0
|
| Claims, benefits and expenses paid |
0
|
0
|
| Cash flows |
0
|
0
|
| Net exchange differences |
210
|
(972)
|
| Closing net balance |
7,556
|
8,406
|
| CSM [member] | Insurance contracts other than those to which premium allocation approach has been applied [member] | Investment contracts with DPF [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Net opening balance, Investment contracts |
245
|
233
|
| Changes in estimates that adjust contractual service margin |
(20)
|
61
|
| Changes in estimates that adjust onerous contracts |
0
|
0
|
| Changes that relate to future service |
(19)
|
61
|
| Earnings released from contractual service margin |
(9)
|
(37)
|
| Release of risk adjustment |
0
|
0
|
| Changes that relate to current service |
(9)
|
(37)
|
| Insurance service result |
(28)
|
25
|
| Variable Fee Approach [Abstract] |
|
|
| Change in fair value of the underlying assets of products with direct participating features |
0
|
0
|
| Insurance finance income / (expenses) |
0
|
0
|
| Premiums received |
0
|
0
|
| Claims, benefits and expenses paid |
0
|
0
|
| Cash flows |
0
|
0
|
| Net exchange differences |
2
|
(13)
|
| Net closing balance, Investment contracts |
4
|
245
|
| Discontinued operations [member] | Insurance contracts issued [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Transfers to disposal groups |
42,977
|
|
| Discontinued operations [member] | Investment contracts with DPF [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Net opening balance, Investment contracts |
0
|
|
| Changes in estimates that adjust contractual service margin |
0
|
|
| Changes in estimates that adjust onerous contracts |
(1)
|
|
| Transfers to disposal groups |
20,196
|
|
| Changes that relate to future service |
(1)
|
|
| Earnings released from contractual service margin |
(12)
|
|
| Release of risk adjustment |
(3)
|
|
| Revenue recognised for incurred policyholder tax expenses |
0
|
|
| Changes that relate to current service |
(15)
|
|
| Insurance service result |
(16)
|
|
| Variable Fee Approach [Abstract] |
|
|
| Change in fair value of the underlying assets of products with direct participating features |
2,110
|
|
| Insurance finance income / (expenses) |
2,110
|
|
| Premiums received |
90
|
|
| Claims, benefits and expenses paid |
(756)
|
|
| Cash flows |
(666)
|
|
| Net exchange differences |
153
|
|
| Net closing balance, Investment contracts |
21,777
|
0
|
| Discontinued operations [member] | Insurance contracts other than those to which premium allocation approach has been applied [member] | Insurance contracts issued [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Opening net balance |
0
|
|
| Transfers to disposal groups |
42,977
|
|
| Changes in estimates that adjust contractual service margin |
0
|
|
| Changes in estimates that adjust onerous contracts |
(4)
|
|
| Changes that relate to future service |
(4)
|
|
| Earnings released from contractual service margin |
(43)
|
|
| Release of risk adjustment |
(6)
|
|
| Revenue recognised for incurred policyholder tax expenses |
(10)
|
|
| Changes that relate to current service |
(59)
|
|
| Insurance service result |
(62)
|
|
| General Model [Abstract] |
|
|
| Interest accreted to insurance contracts |
6
|
|
| Variable Fee Approach [Abstract] |
|
|
| Change in fair value of the underlying assets |
4,385
|
|
| Change in fulfilment value - risk mitigation option |
(1)
|
|
| Insurance finance income / (expenses) |
4,390
|
|
| Premiums received |
620
|
|
| Claims, benefits and expenses paid |
(1,397)
|
|
| Cash flows |
(777)
|
|
| Net exchange differences |
330
|
|
| Closing net balance |
46,857
|
0
|
| Discontinued operations [member] | BEL [Member] | Insurance contracts issued [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Transfers to disposal groups |
41,515
|
|
| Discontinued operations [member] | BEL [Member] | Investment contracts with DPF [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Net opening balance, Investment contracts |
0
|
|
| Changes in estimates that adjust contractual service margin |
(92)
|
|
| Changes in estimates that adjust onerous contracts |
(1)
|
|
| Transfers to disposal groups |
19,891
|
|
| Changes that relate to future service |
(93)
|
|
| Earnings released from contractual service margin |
0
|
|
| Release of risk adjustment |
0
|
|
| Revenue recognised for incurred policyholder tax expenses |
0
|
|
| Changes that relate to current service |
0
|
|
| Insurance service result |
(93)
|
|
| Variable Fee Approach [Abstract] |
|
|
| Change in fair value of the underlying assets of products with direct participating features |
2,110
|
|
| Insurance finance income / (expenses) |
2,110
|
|
| Premiums received |
90
|
|
| Claims, benefits and expenses paid |
(756)
|
|
| Cash flows |
(666)
|
|
| Net exchange differences |
150
|
|
| Net closing balance, Investment contracts |
21,393
|
0
|
| Discontinued operations [member] | BEL [Member] | Insurance contracts other than those to which premium allocation approach has been applied [member] | Insurance contracts issued [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Opening net balance |
0
|
|
| Changes in estimates that adjust contractual service margin |
(171)
|
|
| Changes in estimates that adjust onerous contracts |
(4)
|
|
| Changes that relate to future service |
(176)
|
|
| Earnings released from contractual service margin |
0
|
|
| Release of risk adjustment |
0
|
|
| Revenue recognised for incurred policyholder tax expenses |
(10)
|
|
| Changes that relate to current service |
(10)
|
|
| Insurance service result |
(185)
|
|
| General Model [Abstract] |
|
|
| Interest accreted to insurance contracts |
4
|
|
| Variable Fee Approach [Abstract] |
|
|
| Change in fair value of the underlying assets |
4,385
|
|
| Change in fulfilment value - risk mitigation option |
(1)
|
|
| Insurance finance income / (expenses) |
4,389
|
|
| Premiums received |
620
|
|
| Claims, benefits and expenses paid |
(1,397)
|
|
| Cash flows |
(777)
|
|
| Net exchange differences |
318
|
|
| Closing net balance |
45,260
|
0
|
| Discontinued operations [member] | RA [member] | Insurance contracts issued [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Transfers to disposal groups |
218
|
|
| Discontinued operations [member] | RA [member] | Investment contracts with DPF [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Net opening balance, Investment contracts |
0
|
|
| Changes in estimates that adjust contractual service margin |
11
|
|
| Changes in estimates that adjust onerous contracts |
0
|
|
| Transfers to disposal groups |
90
|
|
| Changes that relate to future service |
11
|
|
| Earnings released from contractual service margin |
0
|
|
| Release of risk adjustment |
(3)
|
|
| Revenue recognised for incurred policyholder tax expenses |
0
|
|
| Changes that relate to current service |
(3)
|
|
| Insurance service result |
8
|
|
| Variable Fee Approach [Abstract] |
|
|
| Change in fair value of the underlying assets of products with direct participating features |
0
|
|
| Insurance finance income / (expenses) |
0
|
|
| Premiums received |
0
|
|
| Claims, benefits and expenses paid |
0
|
|
| Cash flows |
0
|
|
| Net exchange differences |
1
|
|
| Net closing balance, Investment contracts |
98
|
0
|
| Discontinued operations [member] | RA [member] | Insurance contracts other than those to which premium allocation approach has been applied [member] | Insurance contracts issued [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Opening net balance |
0
|
|
| Changes in estimates that adjust contractual service margin |
23
|
|
| Changes in estimates that adjust onerous contracts |
0
|
|
| Changes that relate to future service |
23
|
|
| Earnings released from contractual service margin |
0
|
|
| Release of risk adjustment |
(6)
|
|
| Revenue recognised for incurred policyholder tax expenses |
0
|
|
| Changes that relate to current service |
(6)
|
|
| Insurance service result |
17
|
|
| General Model [Abstract] |
|
|
| Interest accreted to insurance contracts |
0
|
|
| Variable Fee Approach [Abstract] |
|
|
| Change in fair value of the underlying assets |
0
|
|
| Change in fulfilment value - risk mitigation option |
0
|
|
| Insurance finance income / (expenses) |
0
|
|
| Premiums received |
0
|
|
| Claims, benefits and expenses paid |
0
|
|
| Cash flows |
0
|
|
| Net exchange differences |
2
|
|
| Closing net balance |
237
|
0
|
| Discontinued operations [member] | CSM [member] | Insurance contracts issued [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Transfers to disposal groups |
1,244
|
|
| Discontinued operations [member] | CSM [member] | Investment contracts with DPF [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Net opening balance, Investment contracts |
0
|
|
| Changes in estimates that adjust contractual service margin |
81
|
|
| Changes in estimates that adjust onerous contracts |
0
|
|
| Transfers to disposal groups |
214
|
|
| Changes that relate to future service |
81
|
|
| Earnings released from contractual service margin |
(12)
|
|
| Release of risk adjustment |
0
|
|
| Revenue recognised for incurred policyholder tax expenses |
0
|
|
| Changes that relate to current service |
(12)
|
|
| Insurance service result |
70
|
|
| Variable Fee Approach [Abstract] |
|
|
| Change in fair value of the underlying assets of products with direct participating features |
0
|
|
| Insurance finance income / (expenses) |
0
|
|
| Premiums received |
0
|
|
| Claims, benefits and expenses paid |
0
|
|
| Cash flows |
0
|
|
| Net exchange differences |
2
|
|
| Net closing balance, Investment contracts |
286
|
0
|
| Discontinued operations [member] | CSM [member] | Insurance contracts other than those to which premium allocation approach has been applied [member] | Insurance contracts issued [member] |
|
|
| Disclosure of movement by measurement component insurance reinsurance contracts and investment contracts [line items] |
|
|
| Opening net balance |
0
|
|
| Changes in estimates that adjust contractual service margin |
149
|
|
| Changes in estimates that adjust onerous contracts |
0
|
|
| Changes that relate to future service |
149
|
|
| Earnings released from contractual service margin |
(43)
|
|
| Release of risk adjustment |
0
|
|
| Revenue recognised for incurred policyholder tax expenses |
0
|
|
| Changes that relate to current service |
(43)
|
|
| Insurance service result |
105
|
|
| General Model [Abstract] |
|
|
| Interest accreted to insurance contracts |
1
|
|
| Variable Fee Approach [Abstract] |
|
|
| Change in fair value of the underlying assets |
0
|
|
| Change in fulfilment value - risk mitigation option |
0
|
|
| Insurance finance income / (expenses) |
1
|
|
| Premiums received |
0
|
|
| Claims, benefits and expenses paid |
0
|
|
| Cash flows |
0
|
|
| Net exchange differences |
10
|
|
| Closing net balance |
€ 1,361
|
€ 0
|