Statement Of Changes In Equity [Abstract]

Mondi PLC - Filing #1589356

Concept	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 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	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	18,000,000 EUR	4,760,000,000 EUR	341,000,000 EUR	—	—	—	4,889,000,000 EUR	4,498,000,000 EUR	391,000,000 EUR	—	97,000,000 EUR	—	—	—	—	—	4,300,000,000 EUR	380,000,000 EUR	—	97,000,000 EUR	4,002,000,000 EUR	—	—	—	18,000,000 EUR	377,000,000 EUR	—	—	4,382,000,000 EUR	—	—	4,015,000,000 EUR	370,000,000 EUR	20,000,000 EUR	4,385,000,000 EUR	3,963,000,000 EUR	25,000,000 EUR	97,000,000 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	17,000,000 EUR	—	—	—	— EUR	— EUR	756,000,000 EUR	—	—	—	— EUR	—	9,000,000 EUR	764,000,000 EUR	773,000,000 EUR	756,000,000 EUR	602,000,000 EUR	—	—	— EUR	—	—	582,000,000 EUR	45,000,000 EUR	647,000,000 EUR	—	—	— EUR	— EUR	—	20,000,000 EUR	582,000,000 EUR	—	—	—	—	—	—	—
Other comprehensive income	4,000,000 EUR	—	—	—	— EUR	38,000,000 EUR	38,000,000 EUR	—	—	—	— EUR	—	—	—	34,000,000 EUR	— EUR	368,000,000 EUR	—	—	— EUR	—	—	— EUR	—	—	—	—	359,000,000 EUR	— EUR	—	9,000,000 EUR	359,000,000 EUR	—	—	—	—	—	—	—
Comprehensive income	13,000,000 EUR	—	—	—	— EUR	38,000,000 EUR	794,000,000 EUR	—	—	—	— EUR	—	—	—	807,000,000 EUR	756,000,000 EUR	234,000,000 EUR	—	—	— EUR	—	—	582,000,000 EUR	—	—	—	—	359,000,000 EUR	— EUR	—	11,000,000 EUR	223,000,000 EUR	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	6,000,000 EUR	—	—	—	— EUR	— EUR	298,000,000 EUR	—	—	—	— EUR	—	—	—	304,000,000 EUR	298,000,000 EUR	241,000,000 EUR	—	—	— EUR	—	—	237,000,000 EUR	—	—	—	—	— EUR	— EUR	—	4,000,000 EUR	237,000,000 EUR	—	—	—	—	—	—	—
Increase (decrease) through other changes, equity	— EUR	—	—	—	— EUR	2,000,000 EUR	2,000,000 EUR	—	—	—	— EUR	—	—	—	2,000,000 EUR	— EUR	1,000,000 EUR	—	—	— EUR	—	—	2,000,000 EUR	—	—	—	—	— EUR	— EUR	—	3,000,000 EUR	2,000,000 EUR	—	—	—	—	—	—	—
Increase (decrease) through treasury share transactions, equity	— EUR	—	—	—	7,000,000 EUR	— EUR	— EUR	—	—	—	— EUR	—	—	—	— EUR	7,000,000 EUR	1,000,000 EUR	—	—	13,000,000 EUR	—	—	12,000,000 EUR	—	—	—	—	— EUR	— EUR	—	— EUR	1,000,000 EUR	—	—	—	—	—	—	—
Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity	3,000,000 EUR	—	—	—	— EUR	— EUR	— EUR	—	—	—	— EUR	—	—	—	3,000,000 EUR	— EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—