| **Restructuring Costs - (Details) $ in Millions**                                            | 3 Months Ended | 9 Months Ended |
|----------------------------------------------------------------------------------------------|----------------|----------------|
||
| **Restructuring Cost and Reserve [Line Items]**                                              |           |           |
| Restructuring Costs                                                                          | $ 98           | $ 747          |
| Inventory Write-down                                                                         |           | 194            |
| Inventory Write Down-Cost of Sales                                                           |           | 37             |
| Inventory Write Down-Cost of Services                                                        |           | 157            |
| Workforce reductions [Member]                                                                |           |           |
| **Restructuring Cost and Reserve [Line Items]**                                              |           |           |
| Severance Costs                                                                              | $ 108          | $ 416          |
| Restructuring and Related Cost, Number of Positions Eliminated | Employee                    |           | 16,700         |
| Restructuring and Related Cost, Number of Positions Eliminated, Inception to Date | Employee | 13,100         | 13,100         |
| Payments for Restructuring                                                                   |           | $ 282          |
| Contract Termination [Member]                                                                |           |           |
| **Restructuring Cost and Reserve [Line Items]**                                              |           |           |
| Other Restructuring Costs                                                                    | $ 0            | 83             |
| Payments for Restructuring                                                                   |           | 56             |
| Prepayments Write-Off                                                                        |           | 14             |
| Impairment of buildings and improvements                                                     |           |           |
| **Restructuring Cost and Reserve [Line Items]**                                              |           |           |
| Impairment of Long-Lived Assets Held-for-use                                                 | 0              | 82             |
| Impairment of machinery and equipment                                                        |           |           |
| **Restructuring Cost and Reserve [Line Items]**                                              |           |           |
| Impairment of Long-Lived Assets Held-for-use                                                 | $ (10)         | $ 166          |

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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Charge to cost of goods sold that represents the reduction of the carrying amount of inventory, generally attributable to obsolescence or market conditions.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation.
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| - Definition
Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.
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The number of positions eliminated during the period as a result of restructuring activities.
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The number of positions eliminated as of the balance sheet date since inception of the restructuring plan(s).
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.
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| - Definition
Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.
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