v3.26.1
Schedule H, Line 4(i) - Schedule of Assets (Held at End of Year) (Details) - EBP 002
$ in Thousands
12 Months Ended
Dec. 31, 2025
USD ($)
shares
EBP, Schedule of Asset Held for Investment [Line Items]  
Entity tax identification number 39-1126612
Plan number 002
Investment, number of shares (in shares) | shares
Investment, current value $ 2,378,392
Notes receivable from participants, current value $ 34,165
Minimum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Interest rate 4.25%
Maximum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Interest rate 9.50%
Collective investment trusts  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares
Investment, current value $ 1,860,713
Mutual funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares
Investment, current value $ 331,208
Investment, Identifier [Axis]: Collective investment trusts| AB US Large Cap Growth Collective Trust P-3  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 5,418,653
Investment, current value $ 170,308
Investment, Identifier [Axis]: Collective investment trusts| Diamond Hill Large Cap Fund R2  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 1,437,901
Investment, current value $ 68,201
Investment, Identifier [Axis]: Collective investment trusts| Northern Trust Collective Short Term Investment Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 226,164
Investment, current value $ 226
Investment, Identifier [Axis]: Collective investment trusts| PIMCO Total Return Collective Investment Trust N  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 3,721,593
Investment, current value $ 59,173
Investment, Identifier [Axis]: Collective investment trusts| Vanguard Insitutional Total International Stock Index Trust C  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 243,594
Investment, current value $ 34,274
Investment, Identifier [Axis]: Collective investment trusts| Vanguard Institutional 500 Index Trust C  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 2,489,617
Investment, current value $ 347,102
Investment, Identifier [Axis]: Collective investment trusts| Vanguard Institutional Extended Market Index Trust C  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 324,740
Investment, current value $ 41,762
Investment, Identifier [Axis]: Collective investment trusts| Vanguard Institutional Total Bond Market Index Trust C  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 373,910
Investment, current value $ 41,186
Investment, Identifier [Axis]: Collective investment trusts| Vanguard Target Retirement 2020 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 483,833
Investment, current value $ 40,028
Investment, Identifier [Axis]: Collective investment trusts| Vanguard Target Retirement 2025 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 1,090,668
Investment, current value $ 101,803
Investment, Identifier [Axis]: Collective investment trusts| Vanguard Target Retirement 2030 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 1,487,430
Investment, current value $ 152,923
Investment, Identifier [Axis]: Collective investment trusts| Vanguard Target Retirement 2035 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 1,738,714
Investment, current value $ 195,936
Investment, Identifier [Axis]: Collective investment trusts| Vanguard Target Retirement 2040 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 1,334,901
Investment, current value $ 162,524
Investment, Identifier [Axis]: Collective investment trusts| Vanguard Target Retirement 2045 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 1,371,343
Investment, current value $ 176,300
Investment, Identifier [Axis]: Collective investment trusts| Vanguard Target Retirement 2050 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 950,759
Investment, current value $ 125,633
Investment, Identifier [Axis]: Collective investment trusts| Vanguard Target Retirement 2055 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 528,229
Investment, current value $ 69,710
Investment, Identifier [Axis]: Collective investment trusts| Vanguard Target Retirement 2060 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 391,568
Investment, current value $ 31,130
Investment, Identifier [Axis]: Collective investment trusts| Vanguard Target Retirement 2065 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 163,414
Investment, current value $ 8,020
Investment, Identifier [Axis]: Collective investment trusts| Vanguard Target Retirement 2070 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 55,063
Investment, current value $ 1,638
Investment, Identifier [Axis]: Collective investment trusts| Vanguard Target Retirement Income Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 526,142
Investment, current value $ 32,836
Investment, Identifier [Axis]: Common stock| Assurant, Inc. stock  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 208,201
Investment, current value $ 50,145
Investment, Identifier [Axis]: Money market fund| Vanguard Cash Reserves Federal Money Market Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 136,325,896
Investment, current value $ 136,326
Investment, Identifier [Axis]: Mutual funds| American Funds EuroPacific Growth Fund R6  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 1,195,244
Investment, current value $ 72,408
Investment, Identifier [Axis]: Mutual funds| T. Rowe Price Institutional Small-Cap Stock Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 4,196,703
Investment, current value $ 102,316
Investment, Identifier [Axis]: Mutual funds| Vanguard Growth and Income Fund Admiral  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investment, number of shares (in shares) | shares 1,427,122
Investment, current value $ 156,484