Commitments and Contingent Liabilities (Narrative) (Details)			1 Months Ended	12 Months Ended	99 Months Ended
	Apr. 13, 2026 year	Mar. 05, 2024 EUR (€)	May 31, 2024 exchange_offer	Dec. 31, 2015 trust	Mar. 31, 2026 USD ($) $ / shares shares	Dec. 31, 2025 USD ($)
Loss Contingencies [Line Items]
Commitments and letters of credit					$ 354,068,800,000	$ 349,426,200,000
Repurchase agreement counterparty, amount at risk					0	0
Loss contingency accrual					$ 0
Common stock, convertible, conversion price					1.5075
Visa
Loss Contingencies [Line Items]
Escrow deposit					$ 5,800,000,000
Visa Class C shares
Loss Contingencies [Line Items]
Exchange offer program, number of exchange offers | exchange_offer			3
Exchange offer program, length of time between exchanges			12 months
Exchange offer program, claim reduction percentage			50.00%
Number of shares held (in shares) | shares					10,700
Equity securities					$ 12,900,000
Visa Class C shares | Subsequent Event
Loss Contingencies [Line Items]
Exchange offer, exchange percentage for Class B-2 Shares	50.00%
Visa Class C shares | Subsequent Event | Exchange Offer Tranche One
Loss Contingencies [Line Items]
Exchange offer program transfer thresholds | year	0.3333
Exchange offer program transfer periods	45 days
Visa Class C shares | Subsequent Event | Exchange Offer Tranche Two
Loss Contingencies [Line Items]
Exchange offer program transfer thresholds | year	0.6667
Exchange offer program transfer periods	90 days
Visa Class C shares | Subsequent Event | Exchange Offer Tranche Three
Loss Contingencies [Line Items]
Exchange offer program transfer thresholds | year	1.0
Exchange offer program transfer periods	90 days
Visa Class B-2 Shares
Loss Contingencies [Line Items]
Carryover basis					0
Estimated value assuming conversion					$ 940,800,000
Visa Class A | Visa
Loss Contingencies [Line Items]
Share price (in USD) | $ / shares					$ 302.24
Visa Class B-3 Shares | Subsequent Event
Loss Contingencies [Line Items]
Exchange offer, exchange percentage for Class B-2 Shares	50.00%
Northern Trust Fiduciary Services (Guernsey) Limited | Subsidiaries
Loss Contingencies [Line Items]
Number of administrated trusts serving as trustee on | trust				2
Lower Limit
Loss Contingencies [Line Items]
Estimated loss					$ 0
Upper Limit
Loss Contingencies [Line Items]
Estimated loss					10,000,000
Indemnification Agreement
Loss Contingencies [Line Items]
Credit loss liability					0	0
Northern Trust Fiduciary Services (Guernsey) Limited
Loss Contingencies [Line Items]
Litigation settlement, amount awarded to other party | €		€ 187,500
Securities Lent with Indemnification
Loss Contingencies [Line Items]
Commitments and letters of credit					$ 177,081,700,000	$ 170,738,800,000