Statement Of Changes In Equity [Abstract]

Safestore Holdings PLC - Filing #1990463

Concept	2022-11-01 to 2023-10-31	2022-11-01 to 2023-10-31	2022-11-01 to 2023-10-31	2022-11-01 to 2023-10-31	2022-11-01 to 2023-10-31	2021-11-01 to 2022-10-31	2021-11-01 to 2022-10-31	2021-11-01 to 2022-10-31	2021-11-01 to 2022-10-31	2021-11-01 to 2022-10-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Increase (decrease) through exercise of options, equity	— GBP	2,900,000 GBP	— GBP	2,900,000 GBP	— GBP	— GBP	8,600,000 GBP	— GBP	8,600,000 GBP	— GBP
Increase (decrease) through transactions with owners, equity	100,000 GBP	63,000,000 GBP	— GBP	62,700,000 GBP	200,000 GBP	— GBP	47,800,000 GBP	500,000 GBP	48,300,000 GBP	— GBP