Equity Affiliates (Investment Listing) (Details)	Sep. 30, 2025
Abdullah Hashim Industrial Gases & Equipment Co., Ltd.
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	25.00%
Air Products South Africa (Proprietary) Limited
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	50.00%
Bangkok Cogeneration Company Limited
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	49.00%
Bangkok Industrial Gases Co., Ltd.
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	49.00%
Blue Hydrogen Industrial Gases Company
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	26.00%
Chengdu Air & Gas Products Ltd.
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	50.00%
Helios S.p.A.
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	49.00%
INFRA Group
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	40.00%
INOX Air Products Private Limited
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	50.00%
Jazan Integrated Gasification and Power Company ("JIGPC")
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	55.00%
Kulim Industrial Gases Sdn. Bhd.
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	50.00%
Sapio Produzione Idrogeno Ossigeno S.r.l.
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	49.00%
Parent | Jazan Integrated Gasification and Power Company ("JIGPC")
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	51.00%