Analysis Of Income And Expense [Abstract]

NN Group N.V. - Filing #5829983

Concept	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31
Analysis of income and expense [abstract]
Material income and expense [abstract]
Investment income	—	5,05 1 EUR	—	—	—	—	—	—	4 ,7 0 7 EUR	—	—	—	—	—
Operating expense	—	1,325,000,000 EUR	—	—	—	—	—	—	1 , 71 8 EUR	—	—	—	—	—
Fee and commission income (expense) [abstract]
Fee and commission income [abstract]
Fee and commission income	—	440,000,000 EUR	—	—	—	—	—	—	388,000,000 EUR	—	—	—	—	—
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax [abstract]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax	—	1,000,000 EUR	—	—	—	1,000,000 EUR	1,000,000 EUR	—	9,000,000 EUR	—	—	—	9,000,000 EUR	9,000,000 EUR
Comprehensive income, continuing and discontinued operations [abstract]
Comprehensive income	19,000,000 EUR	1 ,627 EUR	0 EUR	0 EUR	0 EUR	1,608,000,000 EUR	1,608,000,000 EUR	0 EUR	1 ,496 EUR	12,000,000 EUR	0 EUR	0 EUR	1 ,484 EUR	1 ,484 EUR
Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract]
Comprehensive income, attributable to owners of parent	—	1,608,000,000 EUR	—	—	—	—	—	—	1,4 84 EUR	—	—	—	—	—
Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract]
Comprehensive income, attributable to non-controlling interests	—	19,000,000 EUR	—	—	—	—	—	—	12,000,000 EUR	—	—	—	—	—