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Restructuring Program - Narrative (Details) - USD ($) $ in Millions |  |  |  |  | 3 Months Ended | 9 Months Ended | 113 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 25, 2023 | Sep. 06, 2018 | Aug. 31, 2016 | May 06, 2014 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023
2014-2018 Restructuring Program |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Approved restructuring program cost |  |  | $ 5,700 | $ 3,500 |  |  |  |  |
Reallocation of previously approved capital expenditures to be spent on restructuring program cash costs |  |  | 600 |  |  |  |  |  |
2014-2018 Restructuring Program | Maximum |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Approved capital expenditures |  |  | 1,600 | $ 2,200 |  |  |  |  |
2014-2018 Restructuring Program | Restructuring Program Charges |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Approved restructuring program cost |  |  | 4,100 |  |  |  |  |  |
2014-2018 Restructuring Program | Cash Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Approved restructuring program cost |  |  | 3,100 |  |  |  |  |  |
2014-2018 Restructuring Program | Non-cash Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Approved restructuring program cost |  |  | $ 1,000 |  |  |  |  |  |
Simplify to Grow Program |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Approved restructuring program cost | $ 7,700 |  |  |  |  |  |  |  |
Restructuring and implementation charges |  |  |  |  | $ 20 | $ 16 | $ 61 | $ 70 | $ 5,208
Implementation costs |  |  |  |  | $ 4 | $ 23 | $ 13 | $ 62 | $ 2,088
Simplify to Grow Program | Maximum |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Approved capital expenditures | 2,300 |  |  |  |  |  |  |  |
Increase in approved restructuring program costs |  | $ 1,300 |  |  |  |  |  |  |
Increase in approved capital expenditures |  | $ 700 |  |  |  |  |  |  |
Simplify to Grow Program | Restructuring Program Charges |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Approved restructuring program cost | 5,400 |  |  |  |  |  |  |  |
Simplify to Grow Program | Cash Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Approved restructuring program cost | 4,100 |  |  |  |  |  |  |  |
Simplify to Grow Program | Non-cash Costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Approved restructuring program cost | $ 1,300 |  |  |  |  |  |  |  |

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