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Other Deductions, Net
 12 Months Ended
Sep. 30, 2021
Other Income and Expenses [Abstract]  
Other Deductions, Net OTHER DEDUCTIONS, NET
Other deductions, net are summarized below:
2019 2020 2021 
Amortization of intangibles (intellectual property and customer relationships)$238 239 300 
Restructuring costs95 284 150 
Other(8)9 (132)
     Total$325 532 318 
The increase in intangibles amortization expense for 2021 was due to the OSI acquisition, including backlog amortization of $30. Other is composed of several items, including acquisition/divestiture costs, foreign currency transaction gains and losses, litigation, pension expense and other items. The change in 2021 was primarily due to a favorable impact from pensions and investment-related gains, including gains in the first quarter of fiscal 2021 of $21 from an investment sale and $17 from the acquisition of full ownership of an equity investment, and a gain in the second quarter of $31 from the sale of an equity investment. The change in 2020 was primarily due to special advisory fees of $13.