v3.25.4
Goodwill and intangible assets
 6 Months Ended
Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and intangible assets Goodwill and intangible assets
The changes in the carrying amount of goodwill for the six months ended December 31, 2025 are as follows:
Diversified Industrial
Segment		Aerospace
Systems
Segment		Total
Balance at June 30, 2025$7,728 $2,966 $10,694 
Acquisition475 — 475 
Foreign currency translation(15)(5)(20)
Balance at December 31, 2025$8,188 $2,961 $11,149 
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:
 December 31, 2025June 30, 2025
 Gross Carrying
Amount		Accumulated
Amortization		Gross Carrying
Amount		Accumulated
Amortization
Patents and technology$2,348 $610 $2,134 $556 
Trade names1,090 526 1,037 499 
Customer relationships and other8,449 3,141 8,194 2,936 
Total$11,887 $4,277 $11,365 $3,991 
Total intangible asset amortization expense for the six months ended December 31, 2025 and 2024 was $288 million and $278 million, respectively. The estimated amortization expense for the five years ending June 30, 2026 through 2030 is $585 million, $586 million, $578 million, $557 million and $528 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.