Schedule H, Line 4i - Schedule of Assets (Held At End of Year) (Details) - EBP 004	12 Months Ended
Dec. 31, 2025 USD ($) shares
EBP, Schedule of Asset Held for Investment [Line Items]
Asset held	$ 945,144,695
Minimum
EBP, Schedule of Asset Held for Investment [Line Items]
Asset held for investment, participant loan, interest rate	2.25%
Maximum
EBP, Schedule of Asset Held for Investment [Line Items]
Asset held for investment, participant loan, interest rate	9.50%
Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current value	$ 247,682,435
Variable Annuities
EBP, Schedule of Asset Held for Investment [Line Items]
Current value	43,322,552
Collective Trust Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current value	$ 583,211,015
Participant loans:
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	3,188
Participant loan	$ 16,285,263
Investment, Identifier [Axis]: Collective trust funds \| Fidelity \| FREEDOM 2010 CMGLD POOL D
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	80,760
Current value	$ 1,079,758
Investment, Identifier [Axis]: Collective trust funds \| Fidelity \| FREEDOM 2015 CMGLD POOL D
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	46,238
Current value	$ 647,330
Investment, Identifier [Axis]: Collective trust funds \| Fidelity \| FREEDOM 2020 CMGLD POOL D
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	688,696
Current value	$ 10,089,397
Investment, Identifier [Axis]: Collective trust funds \| Fidelity \| FREEDOM 2025 CMGLD POOL D
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	2,254,787
Current value	$ 34,317,852
Investment, Identifier [Axis]: Collective trust funds \| Fidelity \| FREEDOM 2030 CMGLD POOL D
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	3,615,305
Current value	$ 57,085,673
Investment, Identifier [Axis]: Collective trust funds \| Fidelity \| FREEDOM 2035 CMGLD POOL D
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	3,848,302
Current value	$ 64,689,954
Investment, Identifier [Axis]: Collective trust funds \| Fidelity \| FREEDOM 2040 CMGLD POOL D
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	3,012,368
Current value	$ 54,523,862
Investment, Identifier [Axis]: Collective trust funds \| Fidelity \| FREEDOM 2045 CMGLD POOL D
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	2,946,299
Current value	$ 54,801,169
Investment, Identifier [Axis]: Collective trust funds \| Fidelity \| FREEDOM 2050 CMGLD POOL D
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	2,487,056
Current value	$ 46,259,235
Investment, Identifier [Axis]: Collective trust funds \| Fidelity \| FREEDOM 2055 CMGLD POOL D
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	1,750,970
Current value	$ 32,568,049
Investment, Identifier [Axis]: Collective trust funds \| Fidelity \| FREEDOM 2060 CMGLD POOL D
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	905,701
Current value	$ 16,846,040
Investment, Identifier [Axis]: Collective trust funds \| Fidelity \| FREEDOM 2065 CMGLD POOL D
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	324,084
Current value	$ 6,027,964
Investment, Identifier [Axis]: Collective trust funds \| Fidelity \| FREEDOM CMGLD POOL D
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	772,174
Current value	$ 9,906,999
Investment, Identifier [Axis]: Collective trust funds \| Fidelity \| GROWTH COMPY COMMINGLED PL
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	1,626,288
Current value	$ 144,235,474
Investment, Identifier [Axis]: Collective trust funds \| MFS \| INTERNATIONAL EQUITY CIT CL CT
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	306,409
Current value	$ 3,528,547
Investment, Identifier [Axis]: Collective trust funds \| MFS \| MID CAP GROWTH CIT CL CT
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	104,074
Current value	$ 1,819,572
Investment, Identifier [Axis]: Collective trust funds \| Reliance MetLife \| GAC SERIES 25053 CL M
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	390,752
Current value	$ 44,784,140
Investment, Identifier [Axis]: Common stock of employer\| Flagstar Bank, National Association \| Common Stock
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	4,340,225
Current value	$ 54,643,430
Investment, Identifier [Axis]: Mutual Funds \| MFS \| NEW DISCOVERY VALUE R6
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	286,023
Current value	$ 4,828,073
Investment, Identifier [Axis]: Mutual Funds \| Principal \| SMALLCAP GROWTH I R6
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	384,984
Current value	$ 5,928,752
Investment, Identifier [Axis]: Mutual Funds \| Vanguard \| INSTITUTIONAL INDEX INSTL PL
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	220,758
Current value	$ 121,873,655
Investment, Identifier [Axis]: Mutual Funds \| Vanguard \| MID CAP INDEX I
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	532,757
Current value	$ 42,290,272
Investment, Identifier [Axis]: Mutual Funds \| Vanguard \| SMALL CAP INDEX I
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	193,082
Current value	$ 23,861,018
Investment, Identifier [Axis]: Mutual Funds \| Vanguard \| TOTAL BOND MARKET INDEX INST
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	2,097,489
Current value	$ 20,492,463
Investment, Identifier [Axis]: Mutual Funds \| Vanguard \| TOTAL INTL STOCK INDEX INSTL
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	116,132
Current value	$ 18,823,825
Investment, Identifier [Axis]: Mutual Funds \| Victory \| SYCAMORE ESTABLISHED VALUE R6
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	201,050
Current value	$ 9,059,322
Investment, Identifier [Axis]: Mutual Funds\| Dreyfus \| GOVERNMENT CASH MGMT INSTL
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	525,055
Current value	$ 525,055
Investment, Identifier [Axis]: Variable annuities \| JPMorgan \| Equity INCM Fund
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	2,496,828
Current value	$ 30,627,000
Investment, Identifier [Axis]: Variable annuities \| PGIM \| Total Return Bond Fund
EBP, Schedule of Asset Held for Investment [Line Items]
Number of shares/units \| shares	893,020
Current value	$ 12,695,552

Amount of total assets in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, current value of investment, participant loan, and plan interest in master trust.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)
-Publisher DOL-EBSA

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- Definition

Current value of investment, excluding plan interest in master trust, in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract.

+ References

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- Definition

Amount, after deemed distribution, of participant loan in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

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- Definition

Number of shares or units of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (3)
-Publisher DOL-EBSA

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (4)
-Publisher DOL-EBSA

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(B)
-Publisher DOL-EBSA

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (2)(i)(B)
-Publisher DOL-EBSA

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 6
-Paragraph d
-Subparagraph (1)(ii)
-Publisher DOL-EBSA

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-02(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

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- Definition

Interest rate on participant loan in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(D)
-Publisher DOL-EBSA

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(A)
-Publisher DOL-EBSA

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(C)
-Publisher DOL-EBSA

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(B)
-Publisher DOL-EBSA

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