Statement Of Comprehensive Income [Abstract]

Grainger PLC - Filing #1807285

Concept	2021-10-01 to 2022-09-30	2021-10-01 to 2022-09-30	2021-10-01 to 2022-09-30	2021-10-01 to 2022-09-30	2021-10-01 to 2022-09-30	2021-10-01 to 2022-09-30	2021-10-01 to 2022-09-30	2020-10-01 to 2021-09-30	2020-10-01 to 2021-09-30	2020-10-01 to 2021-09-30	2020-10-01 to 2021-09-30	2020-10-01 to 2021-09-30	2020-10-01 to 2021-09-30	2020-10-01 to 2021-09-30
Statement of comprehensive income [abstract]
Profit (loss)	229 .4 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	229. 4 GBP	– GBP	10 9 . 5 GBP	– GBP	10 9. 5 GBP	– GBP	– GBP	– GBP
Other comprehensive income [abstract]
Other comprehensive income	39,700,000 GBP	– GBP	– GBP	– GBP	35,400,000 GBP	– GBP	4,300,000 GBP	– GBP	1 7. 6 GBP	– GBP	4,300,000 GBP	– GBP	– GBP	13 . 3 GBP
Comprehensive income	2 6 9 .1 GBP	– GBP	– GBP	– GBP	35. 4 GBP	– GBP	233,700,000 GBP	– GBP	1 2 7.1 GBP	– GBP	11 3 . 8 GBP	– GBP	– GBP	13 . 3 GBP