Disclosure Of Analysis Of Other Comprehensive Income By Item [Text Block]

Hammerson PLC - Filing #1587226

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	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	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31
Disclosure of analysis of other comprehensive income by item [text block]	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Disclosure of analysis of other comprehensive income by item [abstract]
Disclosure of analysis of other comprehensive income by item [line items]
Other comprehensive income, net of tax, exchange differences on translation of foreign operations	– GBP	– GBP	– GBP	– GBP	– GBP	139,700,000 GBP	– GBP	139,700,000 GBP	– GBP	– GBP	139,700,000 GBP	– GBP	171 .1 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	171,100,000 GBP	– GBP	– GBP	171,100,000 GBP	– GBP
Other comprehensive income, net of tax, cash flow hedges	—	—	—	—	—	—	—	—	—	—	1,700,000 GBP	—	4,800,000 GBP	—	—	—	—	—	—	—	—	—	—	—
Other comprehensive income, net of tax, hedges of net investments in foreign operations	– GBP	– GBP	– GBP	– GBP	– GBP	112,200,000 GBP	– GBP	– GBP	112,200,000 GBP	– GBP	112,200,000 GBP	– GBP	109,200,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	109,200,000 GBP	109,200,000 GBP
Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans	– GBP	– GBP	– GBP	– GBP	– GBP	18,900,000 GBP	– GBP	– GBP	– GBP	– GBP	18,900,000 GBP	18,900,000 GBP	12,800,000 GBP	– GBP	– GBP	12,800,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	12,800,000 GBP	– GBP
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax	– GBP	– GBP	– GBP	– GBP	– GBP	1,300,000 GBP	– GBP	– GBP	– GBP	– GBP	1,300,000 GBP	1,300,000 GBP	1,000,000 GBP	– GBP	– GBP	1,000,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	1,000,000 GBP	– GBP