Statement Of Changes In Equity [Abstract]

QinetiQ Group PLC - Filing #6123075

Concept	As at 2025-03-31	2024-04-01 to 2025-03-31	As at 2025-03-31	As at 2025-03-31	2024-04-01 to 2025-03-31	As at 2025-03-31	As at 2025-03-31	2024-04-01 to 2025-03-31	As at 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	As at 2025-03-31	2024-04-01 to 2025-03-31	As at 2024-03-31	As at 2024-03-31	2023-04-01 to 2024-03-31	As at 2024-03-31	2023-04-01 to 2024-03-31	As at 2024-03-31	As at 2024-03-31	As at 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	As at 2024-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	626,500,000 GBP	—	41,000,000 GBP	147,600,000 GBP	—	5,500,000 GBP	456,800,000 GBP	—	3,200,000 GBP	—	—	—	—	—	27,600,000 GBP	—	742,300,000 GBP	147,600,000 GBP	—	5,700,000 GBP	—	40,800,000 GBP	926,100,000 GBP	6,400,000 GBP	—	—	—	—	—	—	—	16,700,000 GBP	968,300,000 GBP	147,600,000 GBP	5,800,000 GBP	40,800,000 GBP	6,300,000 GBP	772,000,000 GBP	4,200,000 GBP
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	185,700,000 GBP	—	—	185,700,000 GBP	—	—	- GBP	—	- GBP	- GBP	- GBP	332,700,000 GBP	147,000,000 GBP	—	- GBP	—	—	- GBP	—	139,600,000 GBP	—	—	—	- GBP	- GBP	- GBP	30,000,000 GBP	169,600,000 GBP	- GBP	139,600,000 GBP	—	—	—	—	—	—	—	—
Other comprehensive income	—	800,000 GBP	—	—	13,300,000 GBP	—	—	- GBP	—	3,200,000 GBP	- GBP	- GBP	—	—	—	10,900,000 GBP	—	—	100,000 GBP	—	94,100,000 GBP	—	—	—	- GBP	- GBP	- GBP	—	—	12,500,000 GBP	81,700,000 GBP	—	—	—	—	—	—	—	—
Comprehensive income	—	186,500,000 GBP	—	—	172,400,000 GBP	—	—	- GBP	—	3,200,000 GBP	- GBP	- GBP	—	—	—	10,900,000 GBP	—	—	100,000 GBP	—	45,500,000 GBP	—	—	—	- GBP	- GBP	- GBP	—	—	12,500,000 GBP	57,900,000 GBP	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	—	47,900,000 GBP	—	—	47,900,000 GBP	—	—	- GBP	—	- GBP	- GBP	- GBP	—	—	—	- GBP	—	—	- GBP	—	45,600,000 GBP	—	—	—	- GBP	- GBP	- GBP	—	—	- GBP	45,600,000 GBP	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	—	8,900,000 GBP	—	—	8,900,000 GBP	—	—	- GBP	—	- GBP	- GBP	- GBP	—	—	—	- GBP	—	—	- GBP	—	8,800,000 GBP	—	—	—	- GBP	- GBP	- GBP	—	—	- GBP	8,800,000 GBP	—	—	—	—	—	—	—	—