Acquisitions and divestitures - Narrative (Details) - USD ($) $ in Millions			1 Months Ended	9 Months Ended
	Nov. 11, 2025	Sep. 18, 2025	Nov. 30, 2024	Mar. 31, 2026	Mar. 31, 2025
Business Combination [Line Items]
Total purchase price				$ 1,014	$ 0
Amortization				436	414
Proceeds from sale of businesses				1	623
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Composites And Fuel Containment Business | Diversified Industrial
Business Combination [Line Items]
Proceeds from sale of businesses			$ 555
Pre-tax gain related to divestiture					238
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Non-Core Filtration Business | Diversified Industrial
Business Combination [Line Items]
Proceeds from sale of businesses			$ 66
Pre-tax gain related to divestiture					$ 11
Filtration Group Corporation
Business Combination [Line Items]
Aggregate cash purchase price, pending acquisition	$ 9,250
Curtis Instruments, Inc
Business Combination [Line Items]
Total purchase price		$ 1,000
Intangible assets		551
Net sales				161
Acquisition-related transaction costs				34
Amortization				$ 11
Curtis Instruments, Inc | Customer relationships
Business Combination [Line Items]
Intangible assets		$ 275
Weighted average useful life of intangible assets		18 years
Curtis Instruments, Inc | Patents and technology
Business Combination [Line Items]
Intangible assets		$ 220
Weighted average useful life of intangible assets		10 years
Curtis Instruments, Inc | Trade names
Business Combination [Line Items]
Intangible assets		$ 56
Weighted average useful life of intangible assets		13 years