Statement Of Changes In Equity [Abstract]

bpost SA/NV - Filing #3125941

Concept	2021-01-01 to 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	As at 2021-12-31	As at 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	2021-01-01 to 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	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	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	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 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	As at 2019-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	0 EUR	2,502,000,000 EUR	—	—	8,853,000,000 EUR	2,382,000,000 EUR	—	—	8,848,000,000 EUR	5,000,000 EUR	—	324,000,000 EUR	3,640,000,000 EUR	—	—	—	192,000,000 EUR	13,000,000 EUR	—	3,640,000,000 EUR	5,825,000,000 EUR	—	2,554,000,000 EUR	—	0 EUR	176,000,000 EUR	—	5,838,000,000 EUR	—	—	—	6,809,000,000 EUR	17,000,000 EUR	340,000,000 EUR	6,826,000,000 EUR	307,000,000 EUR	0 EUR	3,640,000,000 EUR	2,523,000,000 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	6,000,000 EUR	—	—	0 EUR	2,509,000,000 EUR	—	—	0 EUR	0 EUR	—	—	0 EUR	—	—	2,502,000,000 EUR	2,509,000,000 EUR	192,000,000 EUR	—	—	0 EUR	—	—	194,000,000 EUR	—	0 EUR	—	—	0 EUR	—	0 EUR	1,000,000 EUR	194,000,000 EUR	—	—	—	—	—	—	—	—
Other comprehensive income	0 EUR	—	—	0 EUR	537,000,000 EUR	—	—	155,000,000 EUR	500,000,000 EUR	—	—	0 EUR	—	—	537,000,000 EUR	192,000,000 EUR	642,000,000 EUR	—	—	0 EUR	—	—	307,000,000 EUR	—	181,000,000 EUR	—	—	0 EUR	—	516,000,000 EUR	0 EUR	642,000,000 EUR	—	—	—	—	—	—	—	—
Comprehensive income	6,000,000 EUR	—	—	0 EUR	3,046,000,000 EUR	—	—	155,000,000 EUR	500,000,000 EUR	—	—	0 EUR	—	—	3,040,000,000 EUR	2,701,000,000 EUR	834,000,000 EUR	—	—	0 EUR	—	—	500,000,000 EUR	—	181,000,000 EUR	—	—	0 EUR	—	516,000,000 EUR	1,000,000 EUR	835,000,000 EUR	—	—	—	—	—	—	—	—
Increase (decrease) through other changes, equity	1,000,000 EUR	—	—	0 EUR	23,000,000 EUR	—	—	17,000,000 EUR	0 EUR	—	—	0 EUR	—	—	24,000,000 EUR	6,000,000 EUR	154,000,000 EUR	—	—	0 EUR	—	—	1,000,000 EUR	—	150,000,000 EUR	—	—	0 EUR	—	0 EUR	5,000,000 EUR	149,000,000 EUR	—	—	—	—	—	—	—	—
Increase (decrease) in equity	—	—	—	—	—	—	—	—	—	—	—	—	—	—	3,015,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—