v3.26.1
Segment Information - Summary of Reconciliation from Operating Result Before Tax to Income Before Tax (Detail) - EUR (€)
€ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Disclosure of reconciliation from operating result before tax to income before tax [Line Items]    
Insurance service expenses € 4,565 € 5,033
Net income / (expenses) on reinsurance held 372 588
Net reinsurance finance income / (expenses) on reinsurance held 332 [1] 267 [2]
Segment total [member]    
Disclosure of reconciliation from operating result before tax to income before tax [Line Items]    
Result before tax from continuing operations 601 570 [2]
Elimination of share in earnings of joint ventures and associates (166) (12) [2]
Insurance service expenses 531 274 [2]
Net income / (expenses) on reinsurance held (192) (14) [2]
Net fair value change of financial investments at FVPL, other than derivatives (545) (425) [2]
Net fair value change of derivatives 0 (5) [2]
Realized gains and losses on financial investments (40) 30 [2]
Net fair value change on investments in real estate 1 (12) [2]
Impairment (losses) / reversals (20) 2 [2]
Insurance finance income / (expenses) 552 239 [2]
Net reinsurance finance income / (expenses) on reinsurance held 0 13 [2]
Fee and commission income 0 (6) [2]
Commissions and expenses 63 48 [2]
Other income (26) 0 [2]
Other charges 1 (3) [2]
Effects related to discontinued operations 41 40 [2]
Operating result 804 741 [2]
Tax effect [3] (157) (158) [2]
Operating result after tax € 646 € 583 [2]
[1] Investment contracts with DPF - Without direct part. includes EUR (2) million in line Total insurance finance income / (expenses) and Insurance net investment result.
[2] 1H 2025 figures are restated as Aegon UK is classified as discontinued operations.
[3] Tax effect was calculated using the respective operating segment’s statutory rate and presented on consolidated basis.