| Intangible Assets - Definite Life Intangible Assets (Narrative) (Details) - USD ($) | 12 Months Ended | ||
|---|---|---|---|
| Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | |
| Goodwill and Intangible Assets Disclosure [Abstract] | |||
| Amortization of intangible assets | $ 133,000,000 | $ 199,000,000 | $ 212,000,000 | 
| Retirement of assets | 0 | 44,000,000 | 0 | 
| Impairments of definite lived intangible assets | $ 0 | $ 1,000,000 | $ 0 | 
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- Definition Finite-Lived Intangible Assets, Retirements No definition available. 
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- References No definition available. 
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- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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