Statement Of Changes In Equity [Abstract]

Computacenter PLC - Filing #3482160

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	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	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	2020-01-01 to 2020-12-31	As at 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	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	As at 2019-12-31	As at 2019-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	115,500,000 GBP	762,300,000 GBP	75,000,000 GBP	—	—	744,800,000 GBP	—	5,400,000 GBP	—	—	740,500,000 GBP	4,000,000 GBP	—	4,300,000 GBP	9,300,000 GBP	—	—	—	635,500,000 GBP	3,100,000 GBP	—	9,300,000 GBP	627,800,000 GBP	—	—	111,700,000 GBP	4,000,000 GBP	15,700,000 GBP	—	630,900,000 GBP	—	—	75,000,000 GBP	—	—	492,600,000 GBP	100,000 GBP	492,500,000 GBP	4,000,000 GBP	503,900,000 GBP	113,600,000 GBP	75,000,000 GBP	14,000,000 GBP	9,300,000 GBP
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	1,200,000 GBP	—	—	—	– GBP	185,300,000 GBP	—	– GBP	—	– GBP	– GBP	—	—	– GBP	—	—	186,500,000 GBP	185,300,000 GBP	154,200,000 GBP	—	—	– GBP	—	—	153,800,000 GBP	– GBP	—	—	—	– GBP	—	400,000 GBP	– GBP	—	153,800,000 GBP	– GBP	—	—	—	—	—	—	—	—	—
Other comprehensive income	– GBP	—	—	—	– GBP	9,100,000 GBP	—	– GBP	—	10,300,000 GBP	– GBP	—	—	– GBP	—	—	9,100,000 GBP	1,200,000 GBP	2,700,000 GBP	—	—	– GBP	—	—	4,400,000 GBP	1,700,000 GBP	—	—	—	– GBP	—	– GBP	– GBP	—	2,700,000 GBP	– GBP	—	—	—	—	—	—	—	—	—
Comprehensive income	1,200,000 GBP	—	—	—	– GBP	176,200,000 GBP	—	– GBP	—	10,300,000 GBP	– GBP	—	—	– GBP	—	—	177,400,000 GBP	186,500,000 GBP	151,500,000 GBP	—	—	– GBP	—	—	149,400,000 GBP	1,700,000 GBP	—	—	—	– GBP	—	400,000 GBP	– GBP	—	151,100,000 GBP	– GBP	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	– GBP	—	—	—	– GBP	62,400,000 GBP	—	– GBP	—	– GBP	– GBP	—	—	– GBP	—	—	62,400,000 GBP	62,400,000 GBP	13,900,000 GBP	—	—	– GBP	—	—	13,900,000 GBP	– GBP	—	—	—	– GBP	—	– GBP	– GBP	—	13,900,000 GBP	– GBP	—	—	—	—	—	—	—	—	—
Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2,800,000 GBP	—	—	– GBP	—	—	– GBP	– GBP	—	—	—	– GBP	—	2,800,000 GBP	– GBP	—	– GBP	– GBP	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	– GBP	—	—	—	– GBP	10,600,000 GBP	—	– GBP	—	– GBP	– GBP	—	—	– GBP	—	—	10,600,000 GBP	10,600,000 GBP	7,900,000 GBP	—	—	– GBP	—	—	7,900,000 GBP	– GBP	—	—	—	– GBP	—	– GBP	– GBP	—	7,900,000 GBP	– GBP	—	—	—	—	—	—	—	—	—