0000910073 2026-04-24 2026-04-24 0000910073 us-gaap:CommonStockMember 2026-04-24 2026-04-24 0000910073 nycb:BifurcatedOptionNotesUnitSecuritiesMember 2026-04-24 2026-04-24 0000910073 nycb:FixedToFloatingRateSeriesANoncumulativePerpetualPreferredStockMember 2026-04-24 2026-04-24 false 0000910073 8-K 2026-04-24 Flagstar Bank, National Association X1 1-31565 1-31565 38-2734984 102 Duffy Avenue, 102 Duffy Avenue, Hicksville, NY 11801 516 683-4100 683-4100 Common stock, $0.01 par value per share FLG NYSE Bifurcated Option Note Unit Securities SM FLG PRU NYSE Depositary Shares each representing a 1/40th interest in a share of Fixed-to-Floating Rate Series A Noncumulative Perpetual Preferred Stock FLG PRA NYSE false false false false false 2026-04-24 2026-04-24 2026-04-24