| **Segment Information (Narrative) (Details) - USD ($) $ in Millions**                                       | 12 Months Ended |
|-------------------------------------------------------------------------------------------------------------|-----------------|
||
| **Revenue, Major Customer and Geographic Information [Line Items]**                                         |            |   |   |
| Disclosure on Geographic Areas, Revenue from External Customers Attributed to Foreign Countries             | $ 6,991         | $ 5,629 | $ 5,537 |
| Entity Wide Revenue By Major Customer Percent Of Revenue Did Not Exceed Ten Percent                         | 10.00%          |   |   |
| Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Sony [Member]                          |            |   |   |
| **Revenue, Major Customer and Geographic Information [Line Items]**                                         |            |   |   |
| Entity Wide Revenue By Major Customer Percent Of Revenue                                                    | 33.00%          | 36.00% | 32.00% |
| Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Microsoft [Member]                     |            |   |   |
| **Revenue, Major Customer and Geographic Information [Line Items]**                                         |            |   |   |
| Entity Wide Revenue By Major Customer Percent Of Revenue                                                    | 16.00%          | 18.00% | 17.00% |
| Switzerland [Member]                                                                                        |            |   |   |
| **Revenue, Major Customer and Geographic Information [Line Items]**                                         |            |   |   |
| Disclosure on Geographic Areas, Revenue from External Customers Attributed to Foreign Countries             | $ 3,423         | $ 2,731 | $ 2,586 |
| Disclosure on Geographic Areas, Revenue from External Customers Attributed to Foreign Countries, Percentage | 49.00%          | 49.00% | 47.00% |
| United States [Member]                                                                                      |            |   |   |
| **Revenue, Major Customer and Geographic Information [Line Items]**                                         |            |   |   |
| Disclosure on Geographic Areas, Revenue from External Customers Attributed to Entity's Country of Domicile  | 99.00%          |   |   |

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