The Charles Schwab Corporation – Parent Company Only Financial Statements (Condensed Statements of Cash Flows) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Cash Flows from Operating Activities
Net income		$ 5,855		$ 3,299		$ 3,704
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Other		372		349		199
Net change in:
Other assets		(1,152)		4		(709)
Accrued expenses and other liabilities		1,322		2,852		(241)
Net cash provided by (used for) operating activities		2,118		6,852		9,325
Cash Flows from Investing Activities
Purchases of available for sale securities		(171,732)		(202,171)		(31,815)
Proceeds from sales of available for sale securities		13,306		4,801		24,495
Principal payments on available for sale securities		94,912		63,247		21,616
Net cash provided by (used for) investing activities		(75,663)		(125,851)		11,964
Cash Flows from Financing Activities
Issuance of long-term debt		7,036		3,070		593
Repayment of long-term debt		(1,822)		(700)		0
Repurchases of common stock		0		0		(2,220)
Net proceeds from preferred stock offerings		2,806		4,940		0
Redemption of preferred stock		(600)		0		0
Dividends paid		(1,822)		(1,280)		(1,060)
Proceeds from stock options exercised		221		79		118
Other financing activities		(104)		(55)		(41)
Net cash provided by (used for) financing activities		96,323		143,982		(13,939)
Increase (Decrease) in Cash and Cash Equivalents		22,778		24,983		7,350
Cash and Cash Equivalents, including Amounts Restricted at Beginning of Year		70,560	[1]	45,577	[1]	38,227
Cash and Cash Equivalents, including Amounts Restricted at End of Year	[1]	93,338		70,560		45,577
Parent Company [Member]
Cash Flows from Operating Activities
Net income		5,855		3,299		3,704
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Dividends in excess of (equity in undistributed) earnings of subsidiaries		(3,361)		(2,476)		1,198
Other		21		41		9
Net change in:
Other assets		76		(65)		57
Accrued expenses and other liabilities		112		34		34
Net cash provided by (used for) operating activities		2,703		833		5,002
Cash Flows from Investing Activities
Due from (to) subsidiaries — net		211		46		(122)
Increase in investments in subsidiaries		(10,926)		(2,172)		(1,783)
Repayments (advances) of subordinated loan to CS&Co		0		0		185
Purchases of available for sale securities		(8,002)		(5,397)		(1,141)
Proceeds from sales of available for sale securities		2		2		181
Principal payments on available for sale securities		8,754		2,395		994
Net cash provided by (used for) investing activities		(9,961)		(5,126)		(1,686)
Cash Flows from Financing Activities
Issuance of long-term debt		7,036		3,070		593
Repayment of long-term debt		(1,200)		(700)		0
Issuance of commercial paper		8,253		1,234		1,400
Repayments of commercial paper		(5,250)		(1,234)		(1,400)
Repurchases of common stock		0		0		(2,220)
Net proceeds from preferred stock offerings		2,806		4,940		0
Redemption of preferred stock		(600)		0		0
Dividends paid		(1,822)		(1,280)		(1,060)
Proceeds from stock options exercised		220		79		118
Other financing activities		0		(1)		0
Net cash provided by (used for) financing activities		9,443		6,108		(2,569)
Increase (Decrease) in Cash and Cash Equivalents		2,185		1,815		747
Cash and Cash Equivalents, including Amounts Restricted at Beginning of Year		4,654		2,839		2,092
Cash and Cash Equivalents, including Amounts Restricted at End of Year		6,839		4,654		2,839
Non-Cash Investing and Financing Activity
Exchange of TDA Holding-issued senior notes for CSC-issued senior notes		$ 1,987		$ 0		$ 0

[1] For more information on the nature of restrictions on restricted cash and cash equivalents, see Note 23.