Statement Of Financial Position [Abstract]

Babcock International Group PLC - Filing #1755148

Concept	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31	As at 2020-03-31
Statement of financial position [abstract]
Assets [abstract]
Property, plant and equipment	—	—	—	—	—	—	—	—	—	710,600,000 GBP	—	—	—	—	734,400,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	840,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Right-of-use assets	—	—	—	—	—	—	—	—	—	334,300,000 GBP	—	—	—	—	518,300,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	609,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Goodwill	—	—	—	—	—	—	—	—	—	782,400,000 GBP	—	—	—	—	956,300,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2,381,300,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Intangible assets other than goodwill	—	—	—	—	—	—	—	—	—	175,700,000 GBP	—	—	—	—	199,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	332,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Investments accounted for using equity method	—	—	—	—	—	—	—	—	—	54,300,000 GBP	—	—	—	—	73,500,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	161,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Current tax assets	—	—	—	—	—	—	—	—	—	25,400,000 GBP	—	—	—	—	50,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	57,200,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Deferred tax assets	—	—	—	—	—	—	—	—	—	47,000,000 GBP	—	—	—	—	129,700,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	69,400,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Cash and cash equivalents	—	—	—	—	—	—	—	—	—	1,146,300,000 GBP	—	—	—	—	904,800,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1,845,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Assets	—	—	—	—	—	—	—	—	—	4,598,300,000 GBP	—	—	—	—	4,610,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	7,851,100,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity and liabilities [abstract]
Equity [abstract]
Issued capital	—	—	—	—	—	—	—	—	—	303,400,000 GBP	—	—	—	—	303,400,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	303,400,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Retained earnings	—	—	—	—	—	—	—	—	—	1,241,400,000 GBP	—	—	—	—	1,671,700,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	488,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Share premium	—	—	—	—	—	—	—	—	—	873,000,000 GBP	—	—	—	—	873,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	873,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Other reserves	—	—	—	—	—	—	—	—	—	747,000,000 GBP	—	—	—	—	708,300,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	670,800,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity attributable to owners of parent	—	—	—	—	—	—	—	—	—	682,000,000 GBP	—	—	—	—	213,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2,336,100,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Non-controlling interests	—	—	—	—	—	—	—	—	—	19,500,000 GBP	—	—	—	—	16,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	15,700,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity	30,600,000 GBP	682 .0 GBP	768,800,000 GBP	30,600,000 GBP	4,000,000 GBP	303,400,000 GBP	56,400,000 GBP	873,000,000 GBP	1,241,400,000 GBP	701,500,000 GBP	19,500,000 GBP	– GBP	30,600,000 GBP	1,671,700,000 GBP	229,000,000 GBP	303,400,000 GBP	873,000,000 GBP	16,000,000 GBP	21 3.0 GBP	48,400,000 GBP	768,800,000 GBP	42,700,000 GBP	15,700,000 GBP	2,336,100,000 GBP	873,000,000 GBP	303,400,000 GBP	– GBP	– GBP	2 ,314.8 GBP	5 9.5 GBP	4 80.1 GBP	2 ,351.8 GBP	8,800,000 GBP	– GBP	37,000,000 GBP	5 9.5 GBP	768,800,000 GBP	– GBP	37,000,000 GBP	768,800,000 GBP	97,300,000 GBP	69,100,000 GBP	– GBP	2,299,100,000 GBP	15,700,000 GBP	873,000,000 GBP	2 8.2 GBP	303,400,000 GBP	4 88.9 GBP
Liabilities [abstract]
Current tax liabilities	—	—	—	—	—	—	—	—	—	17,700,000 GBP	—	—	—	—	9,700,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	3,800,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Deferred tax liabilities	—	—	—	—	—	—	—	—	—	9,600,000 GBP	—	—	—	—	7,700,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	33,700,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Liabilities	—	—	—	—	—	—	—	—	—	3,896,800,000 GBP	—	—	—	—	4,381,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	5,499,300,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity and liabilities	—	—	—	—	—	—	—	—	—	4,598,300,000 GBP	—	—	—	—	4,610,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	7,851,100,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—