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Goodwill and intangible assets
 9 Months Ended
Mar. 31, 2026
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and intangible assets Goodwill and intangible assets
The changes in the carrying amount of goodwill for the nine months ended March 31, 2026 are as follows:
Diversified Industrial
Segment		Aerospace
Systems
Segment		Total
Balance at June 30, 2025$7,728 $2,966 $10,694 
Acquisition477 — 477 
Foreign currency translation(57)(18)(75)
Balance at March 31, 2026$8,148 $2,948 $11,096 
Goodwill is tested for impairment at the reporting unit level annually and between annual tests whenever events or circumstances indicate that the carrying value of a reporting unit may exceed its fair value. The Company performed its fiscal 2026 annual goodwill impairment test as of January 1, which indicated no impairment existed.
Intangible assets are amortized using the straight-line method over their legal or estimated useful lives. The following summarizes the gross carrying value and accumulated amortization for each major category of intangible assets:
 March 31, 2026June 30, 2025
 Gross Carrying
Amount		Accumulated
Amortization		Gross Carrying
Amount		Accumulated
Amortization
Patents and technology$2,338 $636 $2,134 $556 
Trade names1,085 536 1,037 499 
Customer relationships and other8,403 3,229 8,194 2,936 
Total$11,826 $4,401 $11,365 $3,991 
Total intangible asset amortization expense for the nine months ended March 31, 2026 and 2025 was $436 million and $414 million, respectively. The estimated amortization expense for the five years ending June 30, 2026 through 2030 is $585 million, $587 million, $579 million, $558 million and $529 million, respectively.
The increase in goodwill and intangible assets in fiscal 2026 relates to the acquisition of Curtis. Refer to Note 4 for more information.