Equipment, Office Facilities, and Property - Narrative (Details) $ in Millions	12 Months Ended
Dec. 31, 2023 USD ($)
Property, Plant and Equipment [Abstract]
Impairment losses on fixed assets	$ 47
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Name:	us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration