Other Assets - Capitalized Software (Details) - Capitalized software - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other information related to capitalized software
Amortization expense for capitalized software	$ 9	$ 10	$ 11
Estimated amortization expense
2024	8
2025	7
2026	6
2027	6
2028	$ 5

Amount of expense for amortization of capitalized computer software costs.

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-Topic 985
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-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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