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Summary of Significant Accounting Policies (Components of Fixed Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 2,397	$ 2,444
Less: accumulated depreciation and amortization	(1,538)	(1,562)
Fixed assets, net	859	882	$ 871
Furniture and equipment
Property, Plant and Equipment [Line Items]
Fixed assets, gross	696	776
Land and buildings
Property, Plant and Equipment [Line Items]
Fixed assets, gross	364	360
Leasehold and building improvements
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 1,337	$ 1,308

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- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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