Statement Of Comprehensive Income [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	2022-01-01 to 2023-12-31
Statement of comprehensive income [abstract]
Profit (loss)	19,000,000 EUR	1 ,602 EUR	—	—	—	1,583,000,000 EUR	1,583,000,000 EUR	—	1,184,000,000 EUR	12,000,000 EUR	—	—	1 , 17 2 EUR	1 , 17 2 EUR	—
Other comprehensive income [abstract]
Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract]
Other comprehensive income, net of tax, gains (losses) from investments in equity instruments	—	81,000,000 EUR	—	—	—	81,000,000 EUR	81,000,000 EUR	—	270,000,000 EUR	—	—	—	270,000,000 EUR	270,000,000 EUR	—
Other comprehensive income, net of tax, gains (losses) on revaluation of property, plant and equipment, right-of-use assets and intangible assets	—	—	—	—	—	—	—	—	1,000,000 EUR	—	—	—	1,000,000 EUR	1,000,000 EUR	—
Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans	—	8,000,000 EUR	—	—	—	8,000,000 EUR	8,000,000 EUR	—	1 2 EUR	—	—	—	1 2 EUR	1 2 EUR	—
Other comprehensive income that will not be reclassified to profit or loss, net of tax	—	7 3 EUR	—	—	—	—	—	—	257,000,000 EUR	—	—	—	—	—	—
Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract]
Exchange differences on translation [abstract]
Gains (losses) on exchange differences on translation of foreign operations, net of tax	—	66,000,000 EUR	—	—	—	66,000,000 EUR	66,000,000 EUR	—	80,000,000 EUR	—	—	—	80,000,000 EUR	80,000,000 EUR	—
Cash flow hedges [abstract]
Gains (losses) on cash flow hedges, net of tax	—	44,000,000 EUR	—	—	—	44,000,000 EUR	44,000,000 EUR	—	53,000,000 EUR	—	—	—	—	53,000,000 EUR	53,000,000 EUR
Insurance finance income (expenses) from insurance contracts issued excluded from profit or loss [abstract]
Other comprehensive income, net of tax, insurance finance income (expenses) from insurance contracts issued excluded from profit or loss that will be reclassified to profit or loss	—	4 47 EUR	—	—	—	4 47 EUR	4 47 EUR	—	2 , 63 4 EUR	—	—	—	2 ,6 3 4 EUR	2 , 63 4 EUR	—
Finance income (expenses) from reinsurance contracts held excluded from profit or loss [abstract]
Finance income (expenses) from reinsurance contracts held excluded from profit or loss, net of tax	—	35,000,000 EUR	—	—	—	35,000,000 EUR	35,000,000 EUR	—	1 5 EUR	—	—	—	1 5 EUR	1 5 EUR	—
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	—
Other comprehensive income that will be reclassified to profit or loss, net of tax	—	98,000,000 EUR	—	—	—	—	—	—	55,000,000 EUR	—	—	—	—	—	—
Other comprehensive income	0 EUR	25,000,000 EUR	0 EUR	0 EUR	0 EUR	25,000,000 EUR	25,000,000 EUR	0 EUR	31 2 EUR	0 EUR	0 EUR	0 EUR	312,000,000 EUR	31 2 EUR	—
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 [abstract]
Comprehensive income, attributable to owners of parent	—	1,608,000,000 EUR	—	—	—	—	—	—	1,4 84 EUR	—	—	—	—	—	—
Comprehensive income, attributable to non-controlling interests	—	19,000,000 EUR	—	—	—	—	—	—	12,000,000 EUR	—	—	—	—	—	—