Statement Of Cash Flows [Abstract]

United Utilities Group PLC - Filing #5473421

Concept	2023-04-01 to 2024-03-31	As at 2024-03-31	As at 2023-03-31	2022-04-01 to 2023-03-31
Statement of cash flows [abstract]
Cash flows from (used in) operating activities [abstract]
Cash flows from (used in) operations	865,400,000 GBP	—	—	883,100,000 GBP
Interest paid, classified as operating activities	175,600,000 GBP	—	—	118,200,000 GBP
Interest received, classified as operating activities	50,700,000 GBP	—	—	15,800,000 GBP
Cash flows from (used in) operating activities	745,100,000 GBP	—	—	787,500,000 GBP
Cash flows from (used in) investing activities [abstract]
Cash flows from losing control of subsidiaries or other businesses, classified as investing activities	– GBP	—	—	90,500,000 GBP
Proceeds from sales of property, plant and equipment, classified as investing activities	4,800,000 GBP	—	—	– GBP
Purchase of property, plant and equipment, classified as investing activities	749,500,000 GBP	—	—	675,900,000 GBP
Purchase of intangible assets, classified as investing activities	14,600,000 GBP	—	—	18,100,000 GBP
Proceeds from government grants, classified as investing activities	27,900,000 GBP	—	—	5,100,000 GBP
Cash flows from (used in) investing activities	731,400,000 GBP	—	—	593,400,000 GBP
Cash flows from (used in) financing activities [abstract]
Payments to acquire or redeem entity's shares	3,800,000 GBP	—	—	6,800,000 GBP
Repayments of borrowings, classified as financing activities	248,500,000 GBP	—	—	278,100,000 GBP
Cash flows from (used in) financing activities	1,037,700,000 GBP	—	—	85,000,000 GBP
Effect of exchange rate changes on cash and cash equivalents [abstract]
Effect of exchange rate changes on cash and cash equivalents	– GBP	—	—	1,300,000 GBP
Increase (decrease) in cash and cash equivalents after effect of exchange rate changes	1,051,400,000 GBP	—	—	107,800,000 GBP
Cash and cash equivalents	—	1,399,300,000 GBP	340,400,000 GBP	—