Statement Of Comprehensive Income [Abstract]

Next PLC - Filing #5440305

Concept	2023-01-29 to 2024-01-27	2023-01-29 to 2024-01-27	2023-01-29 to 2024-01-27	2023-01-29 to 2024-01-27	2023-01-29 to 2024-01-27	2023-01-29 to 2024-01-27	2023-01-29 to 2024-01-27	2023-01-29 to 2024-01-27	2023-01-29 to 2024-01-27	2023-01-29 to 2024-01-27	2023-01-29 to 2024-01-27	2023-01-29 to 2024-01-27	2022-01-30 to 2023-01-28	2022-01-30 to 2023-01-28	2022-01-30 to 2023-01-28	2022-01-30 to 2023-01-28	2022-01-30 to 2023-01-28	2022-01-30 to 2023-01-28	2022-01-30 to 2023-01-28	2022-01-30 to 2023-01-28	2022-01-30 to 2023-01-28	2022-01-30 to 2023-01-28	2022-01-30 to 2023-01-28	2022-01-30 to 2023-01-28
Statement of comprehensive income [abstract]
Profit (loss)	802,300,000 GBP	– GBP	1,800,000 GBP	802,300,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	800,500,000 GBP	711,700,000 GBP	– GBP	1,000,000 GBP	711,700,000 GBP	– GBP	– GBP	– GBP	– GBP	710,700,000 GBP	– GBP	– GBP	– GBP
Other comprehensive income [abstract]
Components of other comprehensive income that will not be reclassified to profit or loss, before tax [abstract]
Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans	—	—	—	—	—	—	—	—	—	—	—	103,600,000 GBP	—	—	—	—	—	—	—	—	600,000 GBP	—	—	—
Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract]
Exchange differences on translation [abstract]
Other comprehensive income, before tax, exchange differences on translation of foreign operations	—	—	—	—	—	—	—	—	—	—	—	3,800,000 GBP	—	—	—	—	—	—	—	—	1,200,000 GBP	—	—	—
Cash flow hedges [abstract]
Other comprehensive income, before tax, cash flow hedges	—	—	—	—	—	—	—	—	—	—	—	1,700,000 GBP	—	—	—	—	—	—	—	—	79,200,000 GBP	—	—	—
Cost of hedging [abstract]
Change in value of time value of options [abstract]
Other comprehensive income, before tax, change in value of time value of options	—	—	—	—	—	—	—	—	—	—	—	900,000 GBP	—	—	—	—	—	—	—	—	400,000 GBP	—	—	—
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract]
Income tax relating to remeasurements of defined benefit plans included in other comprehensive income	—	—	—	—	—	—	—	—	—	—	—	25,900,000 GBP	—	—	—	—	—	—	—	—	100,000 GBP	—	—	—
Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract]
Income tax relating to components of other comprehensive income that will be reclassified to profit or loss	—	—	—	—	—	—	—	—	—	—	—	200,000 GBP	—	—	—	—	—	—	—	—	19,700,000 GBP	—	—	—
Other comprehensive income	77,700,000 GBP	– GBP	– GBP	80,900,000 GBP	1,300,000 GBP	– GBP	3,800,000 GBP	700,000 GBP	– GBP	– GBP	– GBP	80,900,000 GBP	500,000 GBP	– GBP	– GBP	60,800,000 GBP	59,400,000 GBP	– GBP	1,200,000 GBP	300,000 GBP	60,800,000 GBP	– GBP	– GBP	– GBP
Comprehensive income	724,600,000 GBP	– GBP	1,800,000 GBP	721,400,000 GBP	1,300,000 GBP	– GBP	3,800,000 GBP	700,000 GBP	– GBP	– GBP	– GBP	719,600,000 GBP	712,200,000 GBP	– GBP	1,000,000 GBP	772,500,000 GBP	59,400,000 GBP	– GBP	1,200,000 GBP	300,000 GBP	771,500,000 GBP	– GBP	– GBP	– GBP
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	—	—	—	—	—	—	—	—	721,400,000 GBP	—	—	—	—	—	—	—	—	772,500,000 GBP	—	—	—
Comprehensive income, attributable to non-controlling interests	—	—	—	—	—	—	—	—	—	—	—	1,800,000 GBP	—	—	—	—	—	—	—	—	1,000,000 GBP	—	—	—