Condensed Consolidated Statements of Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Fee waivers	$ 0	$ 0	$ 0	$ 57

Revenue From Contract With Customer, Fee Waivers Associated With Revenue From Asset Management And Administrative Service

No definition available.

Name:	schw_RevenueFromContractWithCustomerFeeWaiversAssociatedWithRevenueFromAssetManagementAndAdministrativeService
Namespace Prefix:	schw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration