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Other (Income) Expense, Net (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2020 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Component of Other Income / Expense of Nonoperating [Line Items] |  |  |  |  |
Interest income |  | $ (14) | $ (75) | $ (39) | $ (164)
Interest expense |  | 209 | 233 | 421 | 442
Exchange losses |  | 24 | 27 | 78 | 128
Income from investments in equity securities, net (1) |  | (551) | (58) | (603) | (32)
Net periodic defined benefit plan (credit) cost other than service cost |  | (80) | (140) | (170) | (281)
Other, net |  | 22 | 153 | (5) | 234
Other (income) expense, net |  | $ (390) | $ 140 | $ (318) | $ 327
Forecast |  |  |  |  |
Component of Other Income / Expense of Nonoperating [Line Items] |  |  |  |  |
Income from investments in equity securities, net (1) | $ 300 |  |  |  |

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- Definition Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30690-110894 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 35 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121605123&loc=d3e30226-110892 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 10 -Section 45 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=120253306&loc=d3e28228-110885 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895 + Details
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