Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount, after accumulated amortization, of debt premium.

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

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- Definition

Present value of lessee's discounted obligation for lease payments from finance lease.

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Amount of cumulative increase (decrease) in fair value of hedged liability in fair value hedge, attributable to hedged risk. Excludes cumulative basis adjustment related to foreign exchange risk.

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Amount of long-term debt and lease obligation, including portion classified as current.

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No definition available.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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Borrowings - Long-term Debt Including Unamortized Debt Discounts and Premiums (Details) - USD ($) $ in Millions							12 Months Ended
	Nov. 14, 2035	Aug. 24, 2033	May 19, 2033	Nov. 14, 2030	Nov. 17, 2028	May 19, 2028	Dec. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Finance lease liabilities							$ 37	$ 49
Unamortized premium — net							33	54
Debt issuance costs							(82)	(93)
Fair value hedging basis adjustments							11	(7)
Total long-term debt							$ 22,199	22,428
CSC Fixed-rate Senior Notes: \| 3.000% due March 10, 2025
Debt Instrument [Line Items]
Fixed interest rate (percent)							3.00%
Senior notes							$ 0	375
CSC Fixed-rate Senior Notes: \| 4.200% due March 24, 2025
Debt Instrument [Line Items]
Fixed interest rate (percent)							4.20%
Senior notes							$ 0	600
CSC Fixed-rate Senior Notes: \| 3.625% due April 1, 2025
Debt Instrument [Line Items]
Fixed interest rate (percent)							3.625%
Senior notes							$ 0	418
CSC Fixed-rate Senior Notes: \| 3.850% due May 21, 2025
Debt Instrument [Line Items]
Fixed interest rate (percent)							3.85%
Senior notes							$ 0	750
CSC Fixed-rate Senior Notes: \| 3.450% due February 13, 2026
Debt Instrument [Line Items]
Fixed interest rate (percent)							3.45%
Senior notes							$ 350	350
CSC Fixed-rate Senior Notes: \| 0.900% due March 11, 2026
Debt Instrument [Line Items]
Fixed interest rate (percent)							0.90%
Senior notes							$ 1,250	1,250
CSC Fixed-rate Senior Notes: \| 1.150% due May 13, 2026
Debt Instrument [Line Items]
Fixed interest rate (percent)							1.15%
Senior notes							$ 1,000	1,000
CSC Fixed-rate Senior Notes: \| 5.875% due August 24, 2026
Debt Instrument [Line Items]
Fixed interest rate (percent)							5.875%
Senior notes							$ 1,000	1,000
CSC Fixed-rate Senior Notes: \| 3.200% due March 2, 2027
Debt Instrument [Line Items]
Fixed interest rate (percent)							3.20%
Senior notes							$ 650	650
CSC Fixed-rate Senior Notes: \| 2.450% due March 3, 2027
Debt Instrument [Line Items]
Fixed interest rate (percent)							2.45%
Senior notes							$ 1,500	1,500
CSC Fixed-rate Senior Notes: \| 3.300% due April 1, 2027
Debt Instrument [Line Items]
Fixed interest rate (percent)							3.30%
Senior notes							$ 744	744
CSC Fixed-rate Senior Notes: \| 3.200% due January 25, 2028
Debt Instrument [Line Items]
Fixed interest rate (percent)							3.20%
Senior notes							$ 700	700
CSC Fixed-rate Senior Notes: \| 2.000% due March 20, 2028
Debt Instrument [Line Items]
Fixed interest rate (percent)							2.00%
Senior notes							$ 1,250	1,250
CSC Fixed-rate Senior Notes: \| 4.000% due February 1, 2029
Debt Instrument [Line Items]
Fixed interest rate (percent)							4.00%
Senior notes							$ 600	600
CSC Fixed-rate Senior Notes: \| 3.250% due May 22, 2029
Debt Instrument [Line Items]
Fixed interest rate (percent)							3.25%
Senior notes							$ 600	600
CSC Fixed-rate Senior Notes: \| 2.750% due October 1, 2029
Debt Instrument [Line Items]
Fixed interest rate (percent)							2.75%
Senior notes							$ 475	475
CSC Fixed-rate Senior Notes: \| 4.625% due March 22, 2030
Debt Instrument [Line Items]
Fixed interest rate (percent)							4.625%
Senior notes							$ 500	500
CSC Fixed-rate Senior Notes: \| 1.650% due March 11, 2031
Debt Instrument [Line Items]
Fixed interest rate (percent)							1.65%
Senior notes							$ 750	750
CSC Fixed-rate Senior Notes: \| 2.300% due May 13, 2031
Debt Instrument [Line Items]
Fixed interest rate (percent)							2.30%
Senior notes							$ 750	750
CSC Fixed-rate Senior Notes: \| 1.950% due December 1, 2031
Debt Instrument [Line Items]
Fixed interest rate (percent)							1.95%
Senior notes							$ 850	850
CSC Fixed-rate Senior Notes: \| 2.900% due March 3, 2032
Debt Instrument [Line Items]
Fixed interest rate (percent)							2.90%
Senior notes							$ 1,000	1,000
CSC Floating-rate Senior Notes: \| SOFR + 0.520% due May 13, 2026
Debt Instrument [Line Items]
Basis spread rate (percent)							0.52%
Senior notes							$ 500	500
CSC Floating-rate Senior Notes: \| SOFR + 1.050% due March 3, 2027
Debt Instrument [Line Items]
Basis spread rate (percent)							1.05%
Senior notes							$ 500	500
CSC Fixed-to-Floating rate Senior Notes (1): \| 5.643% due May 19, 2029
Debt Instrument [Line Items]
Fixed interest rate (percent)							5.643%
Senior notes							$ 1,200	1,200
CSC Fixed-to-Floating rate Senior Notes (1): \| 6.196% due November 17, 2029
Debt Instrument [Line Items]
Fixed interest rate (percent)							6.196%
Senior notes							$ 1,300	1,300
CSC Fixed-to-Floating rate Senior Notes (1): \| 4.343% due November 14, 2031
Debt Instrument [Line Items]
Fixed interest rate (percent)							4.343%
Senior notes							$ 1,000	0
CSC Fixed-to-Floating rate Senior Notes (1): \| 5.853% due May 19, 2034
Debt Instrument [Line Items]
Fixed interest rate (percent)							5.853%
Senior notes							$ 1,300	1,300
CSC Fixed-to-Floating rate Senior Notes (1): \| 6.136% due August 24, 2034
Debt Instrument [Line Items]
Fixed interest rate (percent)							6.136%
Senior notes							$ 1,350	1,350
CSC Fixed-to-Floating rate Senior Notes (1): \| 4.914% due November 14, 2036
Debt Instrument [Line Items]
Fixed interest rate (percent)							4.914%
Senior notes							$ 1,000	0
CSC Fixed-to-Floating rate Senior Notes (1): \| Forecast \| 5.643% due May 19, 2029
Debt Instrument [Line Items]
Basis spread rate (percent)						2.21%
CSC Fixed-to-Floating rate Senior Notes (1): \| Forecast \| 6.196% due November 17, 2029
Debt Instrument [Line Items]
Basis spread rate (percent)					1.878%
CSC Fixed-to-Floating rate Senior Notes (1): \| Forecast \| 4.343% due November 14, 2031
Debt Instrument [Line Items]
Basis spread rate (percent)				0.94%
CSC Fixed-to-Floating rate Senior Notes (1): \| Forecast \| 5.853% due May 19, 2034
Debt Instrument [Line Items]
Basis spread rate (percent)			2.50%
CSC Fixed-to-Floating rate Senior Notes (1): \| Forecast \| 6.136% due August 24, 2034
Debt Instrument [Line Items]
Basis spread rate (percent)		2.01%
CSC Fixed-to-Floating rate Senior Notes (1): \| Forecast \| 4.914% due November 14, 2036
Debt Instrument [Line Items]
Basis spread rate (percent)	1.23%
Total CSC Senior Notes
Debt Instrument [Line Items]
Senior notes							$ 22,119	22,262
Ameritrade Holding LLC Fixed-rate Senior Notes: \| 3.625% due April 1, 2025
Debt Instrument [Line Items]
Fixed interest rate (percent)							3.625%
Senior notes							$ 0	82
Ameritrade Holding LLC Fixed-rate Senior Notes: \| 3.300% due April 1, 2027
Debt Instrument [Line Items]
Fixed interest rate (percent)							3.30%
Senior notes							$ 56	56
Ameritrade Holding LLC Fixed-rate Senior Notes: \| 2.750% due October 1, 2029
Debt Instrument [Line Items]
Fixed interest rate (percent)							2.75%
Senior notes							$ 25	25
Total Ameritrade Holding LLC Senior Notes
Debt Instrument [Line Items]
Senior notes							$ 81	$ 163