Statement Of Changes In Equity [Abstract]

Alstom - Filing #6246554

Concept	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	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	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	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 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	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 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	2023-04-01 to 2024-03-31	As at 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	—	10 577 EUR	—	113,000,000 EUR	5 870 EUR	268,000,000 EUR	3 231 EUR	—	—	—	10 464 EUR	- EUR	—	—	750,000,000 EUR	—	—	870,000,000 EUR	524,000,000 EUR	—	106,000,000 EUR	8 672 EUR	272,000,000 EUR	—	5 486 EUR	—	—	—	—	—	8 778 EUR	2 690 EUR	- EUR	—	—	741,000,000 EUR	—	—	3,000,000 EUR	520,000,000 EUR	1,000,000 EUR	8 997 EUR	9 102 EUR	406,000,000 EUR	5 445 EUR	2 663 EUR	1 134 EUR	105,000,000 EUR	- EUR	650,000,000 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	149,000,000 EUR	—	179,000,000 EUR	—	—	—	—	- EUR	30,000,000 EUR	- EUR	—	—	- EUR	- EUR	—	- EUR	149,000,000 EUR	—	—	- EUR	—	—	—	309,000,000 EUR	—	- EUR	279,000,000 EUR	- EUR	309,000,000 EUR	- EUR	—	—	—	- EUR	- EUR	—	30,000,000 EUR	- EUR	—	—	—	—	—	—	—	—	—	—	—	—
Other comprehensive income	82,000,000 EUR	—	82,000,000 EUR	—	—	—	—	4,000,000 EUR	- EUR	- EUR	—	—	3,000,000 EUR	- EUR	—	- EUR	71,000,000 EUR	—	—	4,000,000 EUR	—	—	—	7,000,000 EUR	—	134,000,000 EUR	2,000,000 EUR	- EUR	7,000,000 EUR	4,000,000 EUR	—	—	—	- EUR	- EUR	—	5,000,000 EUR	130,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—
Comprehensive income	67,000,000 EUR	—	98,000,000 EUR	—	—	—	—	4,000,000 EUR	31,000,000 EUR	- EUR	—	—	3,000,000 EUR	- EUR	—	- EUR	78,000,000 EUR	—	—	4,000,000 EUR	—	—	—	302,000,000 EUR	—	134,000,000 EUR	277,000,000 EUR	- EUR	302,000,000 EUR	4,000,000 EUR	—	—	—	- EUR	- EUR	—	25,000,000 EUR	130,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—
Issue of equity	977,000,000 EUR	—	977,000,000 EUR	—	—	—	—	- EUR	- EUR	538,000,000 EUR	—	—	- EUR	384,000,000 EUR	—	- EUR	55,000,000 EUR	—	—	- EUR	—	—	—	- EUR	—	- EUR	- EUR	- EUR	- EUR	- EUR	—	—	—	- EUR	- EUR	—	- EUR	- EUR	—	—	—	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	- EUR	—	24,000,000 EUR	—	—	—	—	- EUR	24,000,000 EUR	- EUR	—	—	- EUR	- EUR	—	- EUR	- EUR	—	—	- EUR	—	—	—	38,000,000 EUR	—	- EUR	63,000,000 EUR	- EUR	38,000,000 EUR	- EUR	—	—	—	- EUR	- EUR	—	25,000,000 EUR	- EUR	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	20,000,000 EUR	—	20,000,000 EUR	—	—	—	—	- EUR	- EUR	- EUR	—	—	- EUR	- EUR	—	- EUR	20,000,000 EUR	—	—	- EUR	—	—	—	19,000,000 EUR	—	- EUR	19,000,000 EUR	- EUR	19,000,000 EUR	- EUR	—	—	—	- EUR	- EUR	—	- EUR	- EUR	—	—	—	—	—	—	—	—	—	—	—	—