| **Royalties And Licenses (Narrative) (Details) - USD ($) $ in Millions**                                   | 12 Months Ended |
|------------------------------------------------------------------------------------------------------------|-----------------|
||
| **Royalties And Licenses [Line Items]**                                                                    |            |   |
| Asset Impairment Charges                                                                                   | $ 23            |   |
| Expected accretion expense through March 2022                                                              | 15              |   |
| Business Exit Costs                                                                                        | 19              | $ 122 |
| Royalty-Based Asset Impairment Charge and Loss On Previously Minimum Unrecognized Royalty-Based Commitment | 42              |   |
| Developer And Licensor - Royalty Bearing [Member]                                                          |            |   |
| **Royalties And Licenses [Line Items]**                                                                    |            |   |
| Unrecorded unconditional purchase obligation                                                               | 1,140           |   |
| Research and Development Expense                                                                           |            |   |
| **Royalties And Licenses [Line Items]**                                                                    |            |   |
| Asset Impairment Charges                                                                                   | 32              |   |
| Cost of service revenue [Member]                                                                           |            |   |
| **Royalties And Licenses [Line Items]**                                                                    |            |   |
| Business Exit Costs                                                                                        | $ 10            |   |

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| - Definition
Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.
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| - Definition
Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).
+ References
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