Statement Of Changes In Equity [Abstract]

Mondi PLC - Filing #1589356

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	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	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Increase (decrease) through acquisition of subsidiary, equity	7,000,000 EUR	— EUR	— EUR	— EUR	— EUR	7,000,000 EUR	— EUR	—	—	—	—	—	—	—
Increase (decrease) through appropriation of retained earnings, equity	—	—	—	—	—	—	—	6,000,000 EUR	— EUR	— EUR	— EUR	— EUR	— EUR	6,000,000 EUR
Purchase of treasury shares	— EUR	7,000,000 EUR	— EUR	— EUR	7,000,000 EUR	7,000,000 EUR	— EUR	— EUR	— EUR	6,000,000 EUR	— EUR	6,000,000 EUR	6,000,000 EUR	— EUR