Statement Of Comprehensive Income [Abstract]

Grainger PLC - Filing #2515905

Concept	2023-10-01 to 2024-09-30	2023-10-01 to 2024-09-30	2023-10-01 to 2024-09-30	2023-10-01 to 2024-09-30	2023-10-01 to 2024-09-30	2023-10-01 to 2024-09-30	2023-10-01 to 2024-09-30	2022-10-01 to 2023-09-30	2022-10-01 to 2023-09-30	2022-10-01 to 2023-09-30	2022-10-01 to 2023-09-30	2022-10-01 to 2023-09-30	2022-10-01 to 2023-09-30	2022-10-01 to 2023-09-30
Statement of comprehensive income [abstract]
Profit (loss)	31,200,000 GBP	– GBP	– GBP	– GBP	– GBP	31,200,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	25,600,000 GBP	25,600,000 GBP	– GBP
Other comprehensive income [abstract]
Other comprehensive income	2,300,000 GBP	15,600,000 GBP	– GBP	– GBP	– GBP	17,900,000 GBP	– GBP	– GBP	– GBP	– GBP	12,100,000 GBP	12,900,000 GBP	800,000 GBP	– GBP
Comprehensive income	28,900,000 GBP	15,600,000 GBP	– GBP	– GBP	– GBP	13,300,000 GBP	– GBP	– GBP	– GBP	– GBP	12,100,000 GBP	12,700,000 GBP	24,800,000 GBP	– GBP