Statement Of Comprehensive Income [Abstract]

NN Group N.V. - Filing #2154250

Concept	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 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31
Statement of comprehensive income [abstract]
Profit (loss)	—	1, 184 EUR	12,000,000 EUR	—	—	1,172,000,000 EUR	1,172,000,000 EUR	—	1,634,000,000 EUR	1,634,000,000 EUR	1,62 9 EUR	—	5,000,000 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	—	270,000,000 EUR	—	—	—	270,000,000 EUR	270,000,000 EUR	—	1,596,000,000 EUR	1,596,000,000 EUR	1,596,000,000 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	—	2,000,000 EUR	2,000,000 EUR	2,000,000 EUR	—	—	—
Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans	—	12,000,000 EUR	—	—	—	12,000,000 EUR	12,000,000 EUR	—	68,000,000 EUR	68,000,000 EUR	68,000,000 EUR	—	—	—
Other comprehensive income that will not be reclassified to profit or loss, net of tax	—	257,000,000 EUR	—	—	—	—	—	—	—	—	1,526,000,000 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	—	80,000,000 EUR	—	—	—	80,000,000 EUR	80,000,000 EUR	—	105,000,000 EUR	105,000,000 EUR	105,000,000 EUR	—	—	—
Cash flow hedges [abstract]
Gains (losses) on cash flow hedges, net of tax	—	53,000,000 EUR	—	—	—	53,000,000 EUR	53,000,000 EUR	—	5,943,000,000 EUR	5,943,000,000 EUR	5,943,000,000 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	—	2,634,000,000 EUR	—	—	—	2,634,000,000 EUR	2,634,000,000 EUR	—	26,025,000,000 EUR	26,025,000,000 EUR	26,025,000,000 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	—	15,000,000 EUR	—	—	—	15,000,000 EUR	15,000,000 EUR	—	143,000,000 EUR	143,000,000 EUR	143,000,000 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	—	9,000,000 EUR	—	—	—	9,000,000 EUR	9,000,000 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	—	55,000,000 EUR	—	—	—	—	—	—	—	—	904,000,000 EUR	—	—	—
Other comprehensive income	0 EUR	312,000,000 EUR	0 EUR	0 EUR	0 EUR	312,000,000 EUR	312,000,000 EUR	0 EUR	2,385,000,000 EUR	2,385,000,000 EUR	2,430,000,000 EUR	0 EUR	45,000,000 EUR	0 EUR
Comprehensive income	0 EUR	1,496,000,000 EUR	12,000,000 EUR	0 EUR	0 EUR	1,484,000,000 EUR	1,484,000,000 EUR	0 EUR	751,000,000 EUR	751,000,000 EUR	801,000,000 EUR	0 EUR	50,000,000 EUR	0 EUR
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	1,484,000,000 EUR	—	—	—	—	—	—	—	—	751,000,000 EUR	—	—	—
Comprehensive income, attributable to non-controlling interests	—	12,000,000 EUR	—	—	—	—	—	—	—	—	50,000,000 EUR	—	—	—