Income Taxes Income Taxes - Operating Loss and Tax Credit Carryforwards (Details) - USD ($) $ in Millions |
Dec. 31, 2024 |
Dec. 31, 2023 |
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|---|---|---|---|---|
| Operating Loss Carryforwards [Line Items] | ||||
| Operating Loss Carryforwards | $ 448 | $ 406 | ||
| Tax Credit Carryforwards | 104 | 133 | ||
| Total Operating Loss and Tax Credit Carryforwards | [1] | 552 | 539 | |
| Expiring within Five Years [Member] | ||||
| Operating Loss Carryforwards [Line Items] | ||||
| Operating Loss Carryforwards | 222 | 103 | ||
| Tax Credit Carryforwards | 13 | 59 | ||
| Expiring After Five Years Or Having Indefinite Expiration [Member] | ||||
| Operating Loss Carryforwards [Line Items] | ||||
| Operating Loss Carryforwards | 226 | 303 | ||
| Tax Credit Carryforwards | $ 91 | $ 74 | ||
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