Fair Values of Assets and Liabilities (Fair Value of Other Financial Instruments) (Details) - USD ($) $ in Millions		Jun. 30, 2023	Dec. 31, 2022
Assets
Held to maturity securities:	[1]	$ 166,328	$ 173,074
U.S. agency mortgage-backed securities [Member]
Assets
Held to maturity securities:		166,328	173,074
Carrying Amount [Member]
Assets
Cash and cash equivalents		33,290	26,140
Cash and investments segregated and on deposit for regulatory purposes		9,708	18,288
Receivables from brokerage clients — net		65,147	66,573
Held to maturity securities:		166,328	173,074
Bank loans – net		40,061	40,505
Other assets:		5,420	3,788
Liabilities
Bank deposits		304,414	366,724
Payables to brokerage clients		84,795	97,438
Accrued expenses and other liabilities		5,987	5,584
Other short-term borrowings		7,831	4,650
Federal Home Loan Bank borrowings		41,000	12,400
Long-term debt		22,430	20,760
Carrying Amount [Member] | Residential Real Estate [Member] | First Mortgage [Member]
Assets
Bank loans – net		25,738	25,132
Carrying Amount [Member] | Residential Real Estate [Member] | HELOCs [Member]
Assets
Bank loans – net		510	593
Carrying Amount [Member] | Pledged asset lines [Member]
Assets
Bank loans – net		13,572	14,592
Carrying Amount [Member] | Other [Member]
Assets
Bank loans – net		241	188
Carrying Amount [Member] | U.S. agency mortgage-backed securities [Member]
Assets
Held to maturity securities:		166,328	173,074
Portion at Other than Fair Value Measurement [Member]
Assets
Cash and cash equivalents		33,290	26,140
Cash and investments segregated and on deposit for regulatory purposes		9,708	18,288
Receivables from brokerage clients — net		65,147	66,573
Held to maturity securities:		151,597	158,936
Bank loans – net		36,996	37,638
Other assets:		5,420	3,788
Liabilities
Bank deposits		304,414	366,724
Payables to brokerage clients		84,795	97,438
Accrued expenses and other liabilities		5,987	5,584
Other short-term borrowings		7,831	4,650
Federal Home Loan Bank borrowings		41,000	12,400
Long-term debt		20,553	19,108
Portion at Other than Fair Value Measurement [Member] | Residential Real Estate [Member] | First Mortgage [Member]
Assets
Bank loans – net		22,625	22,201
Portion at Other than Fair Value Measurement [Member] | Residential Real Estate [Member] | HELOCs [Member]
Assets
Bank loans – net		558	657
Portion at Other than Fair Value Measurement [Member] | Pledged asset lines [Member]
Assets
Bank loans – net		13,572	14,592
Portion at Other than Fair Value Measurement [Member] | Other [Member]
Assets
Bank loans – net		241	188
Portion at Other than Fair Value Measurement [Member] | U.S. agency mortgage-backed securities [Member]
Assets
Held to maturity securities:		151,597	158,936
Portion at Other than Fair Value Measurement [Member] | Level 1 [Member]
Assets
Cash and cash equivalents		33,290	26,140
Cash and investments segregated and on deposit for regulatory purposes		4,314	6,156
Receivables from brokerage clients — net		0	0
Held to maturity securities:		0	0
Bank loans – net		0	0
Other assets:		0	0
Liabilities
Bank deposits		0	0
Payables to brokerage clients		0	0
Accrued expenses and other liabilities		0	0
Other short-term borrowings		0	0
Federal Home Loan Bank borrowings		0	0
Long-term debt		0	0
Portion at Other than Fair Value Measurement [Member] | Level 1 [Member] | Residential Real Estate [Member] | First Mortgage [Member]
Assets
Bank loans – net		0	0
Portion at Other than Fair Value Measurement [Member] | Level 1 [Member] | Residential Real Estate [Member] | HELOCs [Member]
Assets
Bank loans – net		0	0
Portion at Other than Fair Value Measurement [Member] | Level 1 [Member] | Pledged asset lines [Member]
Assets
Bank loans – net		0	0
Portion at Other than Fair Value Measurement [Member] | Level 1 [Member] | Other [Member]
Assets
Bank loans – net		0	0
Portion at Other than Fair Value Measurement [Member] | Level 1 [Member] | U.S. agency mortgage-backed securities [Member]
Assets
Held to maturity securities:		0	0
Portion at Other than Fair Value Measurement [Member] | Level 2 [Member]
Assets
Cash and cash equivalents		0	0
Cash and investments segregated and on deposit for regulatory purposes		5,394	12,132
Receivables from brokerage clients — net		65,147	66,573
Held to maturity securities:		151,597	158,936
Bank loans – net		36,996	37,638
Other assets:		5,420	3,788
Liabilities
Bank deposits		304,414	366,724
Payables to brokerage clients		84,795	97,438
Accrued expenses and other liabilities		5,987	5,584
Other short-term borrowings		7,831	4,650
Federal Home Loan Bank borrowings		41,000	12,400
Long-term debt		20,553	19,108
Portion at Other than Fair Value Measurement [Member] | Level 2 [Member] | Residential Real Estate [Member] | First Mortgage [Member]
Assets
Bank loans – net		22,625	22,201
Portion at Other than Fair Value Measurement [Member] | Level 2 [Member] | Residential Real Estate [Member] | HELOCs [Member]
Assets
Bank loans – net		558	657
Portion at Other than Fair Value Measurement [Member] | Level 2 [Member] | Pledged asset lines [Member]
Assets
Bank loans – net		13,572	14,592
Portion at Other than Fair Value Measurement [Member] | Level 2 [Member] | Other [Member]
Assets
Bank loans – net		241	188
Portion at Other than Fair Value Measurement [Member] | Level 2 [Member] | U.S. agency mortgage-backed securities [Member]
Assets
Held to maturity securities:		151,597	158,936
Portion at Other than Fair Value Measurement [Member] | Level 3 [Member]
Assets
Cash and cash equivalents		0	0
Cash and investments segregated and on deposit for regulatory purposes		0	0
Receivables from brokerage clients — net		0	0
Held to maturity securities:		0	0
Bank loans – net		0	0
Other assets:		0	0
Liabilities
Bank deposits		0	0
Payables to brokerage clients		0	0
Accrued expenses and other liabilities		0	0
Other short-term borrowings		0	0
Federal Home Loan Bank borrowings		0	0
Long-term debt		0	0
Portion at Other than Fair Value Measurement [Member] | Level 3 [Member] | Residential Real Estate [Member] | First Mortgage [Member]
Assets
Bank loans – net		0	0
Portion at Other than Fair Value Measurement [Member] | Level 3 [Member] | Residential Real Estate [Member] | HELOCs [Member]
Assets
Bank loans – net		0	0
Portion at Other than Fair Value Measurement [Member] | Level 3 [Member] | Pledged asset lines [Member]
Assets
Bank loans – net		0	0
Portion at Other than Fair Value Measurement [Member] | Level 3 [Member] | Other [Member]
Assets
Bank loans – net		0	0
Portion at Other than Fair Value Measurement [Member] | Level 3 [Member] | U.S. agency mortgage-backed securities [Member]
Assets
Held to maturity securities:		$ 0	$ 0

[1] Certain prior year amounts have been reclassified to conform to the current year presentation. See Note 1 for additional information.