    <SEC-DOCUMENT>0000910073-25-000121-index.html : 20250822
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    <ACCEPTANCE-DATETIME>20250822164009
    ACCESSION NUMBER:		0000910073-25-000121
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		33
    CONFORMED PERIOD OF REPORT:	20250822
    ITEM INFORMATION:		Entry into a Material Definitive Agreement
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20250822
    DATE AS OF CHANGE:		20250822

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			FLAGSTAR FINANCIAL, INC.
    		CENTRAL INDEX KEY:			0000910073
    		STANDARD INDUSTRIAL CLASSIFICATION:	SAVINGS INSTITUTIONS, NOT FEDERALLY CHARTERED [6036]
    		ORGANIZATION NAME:           	02 Finance
    		EIN:				061377322
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-31565
    		FILM NUMBER:		251246811

    	BUSINESS ADDRESS:
    		STREET 1:		102 DUFFY AVENUE
    		CITY:			HICKSVILLE
    		STATE:			NY
    		ZIP:			11801
    		BUSINESS PHONE:		5166834100

    	MAIL ADDRESS:
    		STREET 1:		102 DUFFY AVENUE
    		CITY:			HICKSVILLE
    		STATE:			NY
    		ZIP:			11801

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	NEW YORK COMMUNITY BANCORP, INC.
    		DATE OF NAME CHANGE:	20240311

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	NEW YORK COMMUNITY BANCORP INC
    		DATE OF NAME CHANGE:	20001128

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	QUEENS COUNTY BANCORP INC
    		DATE OF NAME CHANGE:	19930802
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>nycb-20250822.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: nycb-20250822.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-2.1
    <SEQUENCE>2
    <FILENAME>exhibit21-amendedandrest.htm
    <DESCRIPTION>EX-2.1
    <TEXT>
    Document 2 - file: exhibit21-amendedandrest.htm

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    <DOCUMENT>
    <TYPE>EX-10.1
    <SEQUENCE>3
    <FILENAME>exhibit101-flagstarformo.htm
    <DESCRIPTION>EX-10.1
    <TEXT>
    Document 3 - file: exhibit101-flagstarformo.htm

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    <TYPE>EX-101.SCH
    <SEQUENCE>4
    <FILENAME>nycb-20250822.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
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    Document 4 - file: nycb-20250822.xsd

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    <TYPE>EX-101.DEF
    <SEQUENCE>5
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    <DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT
    <TEXT>
    Document 5 - file: nycb-20250822_def.xml

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    <TYPE>EX-101.LAB
    <SEQUENCE>6
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    Document 6 - file: nycb-20250822_lab.xml

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    <SEQUENCE>7
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    <SEQUENCE>8
    <FILENAME>exhibit101-flagstarformo001.jpg
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    Document 8 - file: exhibit101-flagstarformo001.jpg

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    <SEQUENCE>9
    <FILENAME>exhibit101-flagstarformo002.jpg
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    Document 9 - file: exhibit101-flagstarformo002.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>exhibit101-flagstarformo003.jpg
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    Document 10 - file: exhibit101-flagstarformo003.jpg

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    Document 12 - file: exhibit101-flagstarformo005.jpg

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    <SEQUENCE>13
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    Document 13 - file: exhibit101-flagstarformo006.jpg

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    <SEQUENCE>14
    <FILENAME>exhibit101-flagstarformo007.jpg
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    Document 14 - file: exhibit101-flagstarformo007.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>exhibit101-flagstarformo008.jpg
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    Document 15 - file: exhibit101-flagstarformo008.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>exhibit101-flagstarformo009.jpg
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    Document 16 - file: exhibit101-flagstarformo009.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>exhibit21-amendedandrest001.jpg
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    Document 17 - file: exhibit21-amendedandrest001.jpg

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    <SEQUENCE>18
    <FILENAME>exhibit21-amendedandrest002.jpg
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    Document 18 - file: exhibit21-amendedandrest002.jpg

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    <SEQUENCE>19
    <FILENAME>exhibit21-amendedandrest003.jpg
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    Document 19 - file: exhibit21-amendedandrest003.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>exhibit21-amendedandrest004.jpg
    <TEXT>
    Document 20 - file: exhibit21-amendedandrest004.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>exhibit21-amendedandrest005.jpg
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    Document 21 - file: exhibit21-amendedandrest005.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>exhibit21-amendedandrest006.jpg
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    Document 22 - file: exhibit21-amendedandrest006.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>exhibit21-amendedandrest007.jpg
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    Document 23 - file: exhibit21-amendedandrest007.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>exhibit21-amendedandrest008.jpg
    <TEXT>
    Document 24 - file: exhibit21-amendedandrest008.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>exhibit21-amendedandrest009.jpg
    <TEXT>
    Document 25 - file: exhibit21-amendedandrest009.jpg

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    <TYPE>XML
    <SEQUENCE>27
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    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 27 - file: R1.htm

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    <TYPE>XML
    <SEQUENCE>28
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    Document 28 - file: Show.js

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>29
    <FILENAME>report.css
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    Document 29 - file: report.css

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>31
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    <TEXT>
    Document 31 - file: FilingSummary.html

    Document 31 - RAW XML: FilingSummary.xml

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    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>33
    <FILENAME>MetaLinks.json
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    Document 33 - file: MetaLinks.json

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    <SEQUENCE>34
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    Document 34 - file: 0000910073-25-000121-xbrl.zip

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    Document 35 - RAW XML: nycb-20250822_htm.xml

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