Derivative Instruments - Asset and Liability Management Derivative Positions (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Notional Value	$ 1,200,000
Asset and Liability Management Positions
Derivative [Line Items]
Notional Value	93,345	$ 91,328
Fair Value, Assets	304	312
Fair Value, Liabilities	230	241
Asset and Liability Management Positions | Swaps | Visa Class B Shares
Derivative [Line Items]
Fair Value, Liabilities	145	91
Derivative liability notional value	2,100	2,000
Asset and Liability Management Positions | Underwriting Purchase and Sale Commitments
Derivative [Line Items]
Notional Value	862	28
Asset and Liability Management Positions | Other
Derivative [Line Items]
Notional Value	2,988	2,136
Fair Value, Assets	11	11
Fair Value, Liabilities	148	93
Asset and Liability Management Positions | Other economic hedges | Interest rate contracts | Receive fixed/pay floating swaps
Derivative [Line Items]
Notional Value	8,395	7,029
Fair Value, Assets	37	9
Fair Value, Liabilities	1	3
Asset and Liability Management Positions | Other economic hedges | Interest rate contracts | Pay fixed/receive floating swaps
Derivative [Line Items]
Notional Value	2,964	3,801
Fair Value, Assets	0	0
Fair Value, Liabilities	0	0
Asset and Liability Management Positions | Other economic hedges | Interest rate contracts | Futures and forwards | Buy/ Purchased
Derivative [Line Items]
Notional Value	4,764	5,006
Fair Value, Assets	6	29
Fair Value, Liabilities	6	5
Asset and Liability Management Positions | Other economic hedges | Interest rate contracts | Futures and forwards | Sell/ Written
Derivative [Line Items]
Notional Value	2,371	4,501
Fair Value, Assets	2	7
Fair Value, Liabilities	8	34
Asset and Liability Management Positions | Other economic hedges | Interest rate contracts | Options | Buy/ Purchased
Derivative [Line Items]
Notional Value	6,660	6,085
Fair Value, Assets	217	237
Fair Value, Liabilities	0	0
Asset and Liability Management Positions | Other economic hedges | Interest rate contracts | Options | Sell/ Written
Derivative [Line Items]
Notional Value	2,571	3,696
Fair Value, Assets	19	14
Fair Value, Liabilities	60	75
Asset and Liability Management Positions | Other economic hedges | Foreign exchange forward contracts
Derivative [Line Items]
Notional Value	721	734
Fair Value, Assets	1	2
Fair Value, Liabilities	1	5
Asset and Liability Management Positions | Other economic hedges | Equity contracts
Derivative [Line Items]
Notional Value	246	227
Fair Value, Assets	6	2
Fair Value, Liabilities	0	0
Asset and Liability Management Positions | Other economic hedges | Credit contracts
Derivative [Line Items]
Notional Value	2,933	2,620
Fair Value, Assets	1	1
Fair Value, Liabilities	6	0
Asset and Liability Management Positions | Fair value hedges | Interest rate contracts | Receive fixed/pay floating swaps
Derivative [Line Items]
Notional Value	13,800	12,100
Fair Value, Assets	0	0
Fair Value, Liabilities	0	16
Asset and Liability Management Positions | Fair value hedges | Interest rate contracts | Pay fixed/receive floating swaps
Derivative [Line Items]
Notional Value	19,631	24,139
Fair Value, Assets	0	0
Fair Value, Liabilities	0	0
Asset and Liability Management Positions | Cash flow hedges | Interest rate contracts | Receive fixed/pay floating swaps
Derivative [Line Items]
Notional Value	24,400	18,400
Fair Value, Assets	0	0
Fair Value, Liabilities	0	0
Asset and Liability Management Positions | Net investment hedges | Foreign exchange forward contracts
Derivative [Line Items]
Notional Value	901	854
Fair Value, Assets	4	0
Fair Value, Liabilities	$ 0	$ 10