Statement Of Comprehensive Income [Abstract]

Telenet Group Holding NV - Filing #3210241

Concept	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31
Statement of comprehensive income [abstract]
Profit (loss)	400,000 EUR	—	394,000,000 EUR	393,600,000 EUR	394,000,000 EUR	338,900,000 EUR	338,500,000 EUR	400,000 EUR	338,900,000 EUR	—
Other comprehensive income [abstract]
Components of other comprehensive income that will not be reclassified to profit or loss, before tax [abstract]
Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans	—	—	—	2,700,000 EUR	—	—	2,200,000 EUR	—	—	—
Other comprehensive income	—	2,700,000 EUR	2,700,000 EUR	2,700,000 EUR	—	—	1,200,000 EUR	—	1,200,000 EUR	1,200,000 EUR
Comprehensive income	400,000 EUR	2,700,000 EUR	396,700,000 EUR	396,300,000 EUR	394,000,000 EUR	338,900,000 EUR	339,700,000 EUR	400,000 EUR	340,100,000 EUR	1,200,000 EUR
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	396,700,000 EUR	—	—	340,100,000 EUR	—	—	—
Comprehensive income, attributable to non-controlling interests	—	—	—	400,000 EUR	—	—	400,000 EUR	—	—	—