| **Stock-Based Compensation Schedule of Share Repurchases (Details) - USD ($) shares in Millions, $ in Millions** |                 | 3 Months Ended |        |
|------------------------------------------------------------------------------------------------------------------|-----------------|----------------|--------|
||
| **Equity, Class of Treasury Stock [Line Items]**                                                                 |            |           |   |   |   |   |
| Stock Repurchased and Retired During Period, Value                                                               |            |           | $ 320  |   | $ 325 |   |
| November 2020 Repurchase Program [Member]                                                                        |            |           |   |   |   |   |
| **Equity, Class of Treasury Stock [Line Items]**                                                                 |            |           |   |   |   |   |
| Stock Repurchased and Retired During Period, Value                                                               |            | $ 320          |   | $ 325 |   |   |
| Stock Repurchased and Retired During Period, Shares                                                              |            | 2.5            |   | 2.3 |   |   |
| Stock Repurchase Program, Authorized Amount                                                                      |            |           |   |   |   | $ 2,600 |
| Stock Repurchase Program Expiration Date                                                                         | Nov.  04,  2022 |           |   |   |   |   |

| X                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
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.
+ References
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| X                                                                                                                                                                                                                                                                               |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of stock repurchase plan authorized.
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| X                                                                                                                                                                                                                                                                                                                                             |
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| - Definition
Expiration date for the purchase of an entity's own shares under a stock repurchase plan, in the YYYY-MM-DD format.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of shares that have been repurchased and retired during the period.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).
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| X                                                                                                                                                                 |
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