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Goodwill and intangible assets
 9 Months Ended
Mar. 31, 2022
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, 2022 are as follows:
Diversified Industrial
Segment		Aerospace
Systems
Segment		Total
Balance at June 30, 2021$7,457,309 $602,378 $8,059,687 
Divestitures(164)— (164)
Foreign currency translation and other(104,668)(20)(104,688)
Balance at March 31, 2022$7,352,477 $602,358 $7,954,835 
Divestitures represent goodwill associated with the sale of a business during the current-year quarter.
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. At December 31, 2021, the Company performed its fiscal 2022 annual goodwill impairment test, 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, 2022June 30, 2021
 Gross Carrying
Amount		Accumulated
Amortization		Gross Carrying
Amount		Accumulated
Amortization
Patents and technology$995,313 $250,377 $999,952 $216,314 
Trademarks752,259 352,223 762,130 331,905 
Customer lists and other3,823,435 1,714,345 3,869,772 1,563,838 
Total$5,571,007 $2,316,945 $5,631,854 $2,112,057 
Total intangible amortization expense for the nine months ended March 31, 2022 and 2021 was $237 million and $244 million, respectively. The estimated amortization expense for the five years ending June 30, 2022 through 2026 is $315 million, $304 million, $297 million, $286 million and $281 million, respectively.
Intangible assets are evaluated for impairment whenever events or circumstances indicate that the undiscounted net cash flows to be generated by their use over their expected useful lives and eventual disposition may be less than their net carrying value. No material intangible asset impairments occurred during the nine months ended March 31, 2022 and 2021.