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Investments in Unconsolidated Affiliates (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended		12 Months Ended
	Apr. 01, 2025	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Investments in and Advances to Affiliates [Line Items]
Investments in unconsolidated affiliates		$ 1,071	$ 1,506			$ 1,071		$ 1,506
Tax expense		246			$ 221	436	$ 374
Equity securities without a readily determinable fair value		254	250			254		250
Equity securities without readily determinable fair value, upward price adjustment, annual amount		$ 0			$ 6	$ 0	$ 27
Wells Fargo Merchant Services (WFMS)
Investments in and Advances to Affiliates [Line Items]
Percentage of interest owned in affiliate		40.00%				40.00%
Proceeds from divestiture of interest in joint venture	$ 453
Equity method investment, other-than-temporary impairment		$ 8	25	$ 570				595
Tax expense								129
Banc of America Merchant Services
Investments in and Advances to Affiliates [Line Items]
Investments in unconsolidated affiliates		$ 777	$ 1,200			$ 777		$ 1,200

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