0000811830 2026-08-25 2026-08-25 0000811830 snuspfh:DepositarySharesEachRepresentingA11000thInterestInAShareOfFixedRateResetNonCumulativePerpetualPreferredStockSeriesHMember 2026-08-25 2026-08-25 0000811830 snuspfh:DepositarySharesEachRepresentingA140thInterestInAShareOfFixedRateResetNonCumulativePerpetualPreferredStockSeriesIMember 2026-08-25 2026-08-25 Depositary Shares, Each Representing a 1/1,000th Interest in a Share of Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series H Depositary Shares, Each Representing a 1/40th Interest in a Share of Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series I false 0000811830 --12-31 8-K 2026-08-25 Santander Holdings USA, Inc. VA 1-16581 23-2453088 75 State Street Boston MA 02109 800 493-8219 false false false false SNUS PF H NYSE SNUS PF I NYSE false