0001428205 2026-04-01 2026-04-01 0001428205 arr:PreferredClassCMember 2026-04-01 2026-04-01 0001428205 us-gaap:CommonStockMember 2026-04-01 2026-04-01 0001428205 false 8-K 2026-04-01 ARMOUR Residential REIT, Inc. MD 001-34766 26-1908763 3001 Ocean Drive, Suite 201 Vero Beach, FL 32963 772 617-4340 false false false false Preferred Stock, 7.00% Series C Cumulative Redeemable ARR-PRC NYSE Common Stock, $0.001 par value ARR NYSE false 2026-04-01 2026-04-01 2026-04-01