Statement Of Changes In Equity [Abstract]

Computacenter PLC - Filing #3482161

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	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	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 exercise of options, equity	– GBP	– GBP	21,700,000 GBP	– GBP	– GBP	– GBP	6,200,000 GBP	6,200,000 GBP	15,500,000 GBP	15,200,000 GBP	– GBP	20,900,000 GBP	5,700,000 GBP	– GBP	– GBP	– GBP	5,700,000 GBP	– GBP
Decrease (increase) through tax on share-based payment transactions, equity	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	7,600,000 GBP	7,600,000 GBP	7,600,000 GBP	3,400,000 GBP	– GBP	– GBP	3,400,000 GBP	– GBP	– GBP	– GBP	3,400,000 GBP	– GBP
Purchase of treasury shares	– GBP	– GBP	25,500,000 GBP	– GBP	– GBP	– GBP	25,500,000 GBP	25,500,000 GBP	– GBP	– GBP	– GBP	19,000,000 GBP	19,000,000 GBP	– GBP	– GBP	– GBP	19,000,000 GBP	– GBP