Statement Of Changes In Equity [Abstract]

bpost SA/NV - Filing #3125943

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	250,200,000 EUR	—	—	885,300,000 EUR	238,200,000 EUR	—	—	884,800,000 EUR	500,000 EUR	—	32,400,000 EUR	364,000,000 EUR	—	—	—	19,200,000 EUR	1,300,000 EUR	—	364,000,000 EUR	582,500,000 EUR	—	255,400,000 EUR	—	0 EUR	17,600,000 EUR	—	583,800,000 EUR	—	—	—	680,900,000 EUR	1,700,000 EUR	34,000,000 EUR	682,600,000 EUR	30,700,000 EUR	0 EUR	364,000,000 EUR	252,300,000 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	600,000 EUR	—	—	0 EUR	250,900,000 EUR	—	—	0 EUR	0 EUR	—	—	0 EUR	—	—	250,200,000 EUR	250,900,000 EUR	19,200,000 EUR	—	—	0 EUR	—	—	19,400,000 EUR	—	0 EUR	—	—	0 EUR	—	0 EUR	100,000 EUR	19,400,000 EUR	—	—	—	—	—	—	—	—
Other comprehensive income	0 EUR	—	—	0 EUR	53,700,000 EUR	—	—	15,500,000 EUR	50,000,000 EUR	—	—	0 EUR	—	—	53,700,000 EUR	19,200,000 EUR	64,200,000 EUR	—	—	0 EUR	—	—	30,700,000 EUR	—	18,100,000 EUR	—	—	0 EUR	—	51,600,000 EUR	0 EUR	64,200,000 EUR	—	—	—	—	—	—	—	—
Comprehensive income	600,000 EUR	—	—	0 EUR	304,600,000 EUR	—	—	15,500,000 EUR	50,000,000 EUR	—	—	0 EUR	—	—	304,000,000 EUR	270,100,000 EUR	83,400,000 EUR	—	—	0 EUR	—	—	50,000,000 EUR	—	18,100,000 EUR	—	—	0 EUR	—	51,600,000 EUR	100,000 EUR	83,500,000 EUR	—	—	—	—	—	—	—	—
Increase (decrease) through other changes, equity	100,000 EUR	—	—	0 EUR	2,300,000 EUR	—	—	1,700,000 EUR	0 EUR	—	—	0 EUR	—	—	2,400,000 EUR	600,000 EUR	15,400,000 EUR	—	—	0 EUR	—	—	100,000 EUR	—	15,000,000 EUR	—	—	0 EUR	—	0 EUR	500,000 EUR	14,900,000 EUR	—	—	—	—	—	—	—	—
Increase (decrease) in equity	—	—	—	—	—	—	—	—	—	—	—	—	—	—	301,500,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—