Statement Of Changes In Equity [Abstract]

Babcock International Group PLC - Filing #6974491

Concept	2024-04-01 to 2025-03-31	As at 2025-03-31	As at 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 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	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	As at 2025-03-31	2024-04-01 to 2025-03-31	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	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	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	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	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	—	6,300,000 GBP	768,800,000 GBP	—	—	621,800,000 GBP	—	17,400,000 GBP	30,600,000 GBP	873,000,000 GBP	—	303,400,000 GBP	—	1,2 92.3 GBP	—	604,400,000 GBP	—	—	85,400,000 GBP	—	388,900,000 GBP	768,800,000 GBP	5,300,000 GBP	—	—	1,523,900,000 GBP	—	873,000,000 GBP	303,400,000 GBP	30,600,000 GBP	—	17,200,000 GBP	406,100,000 GBP	—	—	—	—	—	—	68,300,000 GBP	353,900,000 GBP	768,800,000 GBP	3,000,000 GBP	370,900,000 GBP	873,000,000 GBP	303,400,000 GBP	30,600,000 GBP	17,000,000 GBP	1,568,800,000 GBP	56,100,000 GBP
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	247,100,000 GBP	—	—	– GBP	– GBP	—	248,900,000 GBP	—	—	—	247,100,000 GBP	—	1,800,000 GBP	—	– GBP	—	– GBP	– GBP	—	– GBP	—	—	—	– GBP	– GBP	—	165,700,000 GBP	—	—	—	168,200,000 GBP	—	—	– GBP	– GBP	– GBP	165,700,000 GBP	2,500,000 GBP	– GBP	—	—	—	—	—	—	—	—	—	—	—
Other comprehensive income	4,500,000 GBP	—	—	1,000,000 GBP	– GBP	—	4,400,000 GBP	—	—	—	11,600,000 GBP	—	100,000 GBP	—	– GBP	—	– GBP	– GBP	—	17,100,000 GBP	—	—	—	– GBP	2,300,000 GBP	—	126 .6 GBP	—	—	—	127,800,000 GBP	—	—	– GBP	– GBP	– GBP	116,700,000 GBP	1,200,000 GBP	12,200,000 GBP	—	—	—	—	—	—	—	—	—	—	—
Comprehensive income	242,600,000 GBP	—	—	1,000,000 GBP	– GBP	—	244,500,000 GBP	—	—	—	258,700,000 GBP	—	1,900,000 GBP	—	– GBP	—	– GBP	– GBP	—	17,100,000 GBP	—	—	—	– GBP	2,300,000 GBP	—	39,100,000 GBP	—	—	—	40,400,000 GBP	—	—	– GBP	– GBP	– GBP	49,000,000 GBP	1,300,000 GBP	12,200,000 GBP	—	—	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	26,700,000 GBP	—	—	– GBP	– GBP	—	28,000,000 GBP	—	—	—	26. 7 GBP	—	1,300,000 GBP	—	– GBP	—	– GBP	– GBP	—	– GBP	—	—	—	– GBP	– GBP	—	8,500,000 GBP	—	—	—	1 0.3 GBP	—	—	– GBP	– GBP	– GBP	8,500,000 GBP	1,800,000 GBP	– GBP	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	14,300,000 GBP	—	—	– GBP	– GBP	—	14,300,000 GBP	—	—	—	14,300,000 GBP	—	– GBP	—	– GBP	—	– GBP	– GBP	—	– GBP	—	—	—	– GBP	– GBP	—	12,400,000 GBP	—	—	—	12,400,000 GBP	—	—	– GBP	– GBP	– GBP	12,400,000 GBP	– GBP	– GBP	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) in equity	215,500,000 GBP	—	—	1,000,000 GBP	– GBP	—	215,700,000 GBP	—	—	—	231,600,000 GBP	—	0 .2 GBP	—	– GBP	—	– GBP	– GBP	—	17,100,000 GBP	—	—	—	– GBP	2,300,000 GBP	—	35,000,000 GBP	—	—	—	35,200,000 GBP	—	—	– GBP	– GBP	– GBP	44,900,000 GBP	200,000 GBP	12,200,000 GBP	—	—	—	—	—	—	—	—	—	—	—