v3.26.1
Schedule of Assets (Held at End of Year) - Summary of Employee Benefit Plan Statement of Investment (Detail) - EBP 004 [Member] - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Employee Benefit Plan Statement Of Investment [Line Items]    
Entity Tax Identification Number 58-2582379  
Employee Benefit Plan, Plan Number 004  
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 937,460,750 $ 859,315,926
Employee Benefit Plan Short Term Investment Fund 136,964 260,541
Employee Benefit Plan, Note Receivable from Participant 19,039,901 $ 23,328,496
Employee Benefit Plan, Asset Held for Investment, Total $ 956,500,651  
Employee Benefit Plan, Investment, Number of Shares 1,678,914 1,609,840
Employee Benefit Plan, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage 50.00%  
Maximum [Member]    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage 10.50% 10.50%
Minimum [Member]    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage 4.25% 9.75%
Common Collective Trust [Member]    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value [1] $ 596,054,812 $ 535,655,589
Mutual Fund [Member]    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value 322,719,629 $ 289,902,003
Investment, Identifier [Axis]: American Europacific Growth Fund    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 35,017,806  
Employee Benefit Plan, Investment, Number of Shares 528,042  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] American Europacific Growth Fund [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Mutual Fund [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Dodge & Cox Income X    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 41,895,366  
Employee Benefit Plan, Investment, Number of Shares 3,257,805  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Dodge and Cox Income X [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Mutual Fund [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Dodge & Cox Stock X    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 89,117,370  
Employee Benefit Plan, Investment, Number of Shares 5,371,752  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Dodge and Cox Stock X [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Mutual Fund [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Flowers Foods, Inc. Common Stock    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value [2] $ 18,549,345  
Employee Benefit Plan, Investment, Number of Shares 1,704,903  
Employee Benefit Plan, Asset Held for Investment, Party-in-Interest [true false] true  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Flowers Foods Inc Common Stock Fund [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] EBP, Employer, Common Stock [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Geneva Small Cap Growth Collective Fund C    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 13,903,219  
Employee Benefit Plan, Investment, Number of Shares 1,370,977  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Geneva Small Cap Growth Collective Fund C [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Harbor Capital Appreciation CIT R    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 99,726,117  
Employee Benefit Plan, Investment, Number of Shares 4,871,818  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Harbor Capital Appreciation CIT R [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Invesco Funds Government & Agency    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan Short Term Investment Fund $ 136,964  
Employee Benefit Plan, Investment, Number of Shares 136,964  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Invesco Funds Government And Agency [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Mutual Fund [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Notes Receivable from Participants    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Note Receivable from Participant [2] $ 19,039,901  
Employee Benefit Plan, Asset Held for Investment, Party-in-Interest [true false] true  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Notes Receivable Fom Participants [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Senior Notes [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Notes Receivable from Participants | Maximum [Member]    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage 9.75%  
Investment, Identifier [Axis]: Notes Receivable from Participants | Minimum [Member]    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage 9.00%  
Investment, Identifier [Axis]: Putnam Stable Value Fund    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 55,306,714  
Employee Benefit Plan, Investment, Number of Shares 54,314,979  
Employee Benefit Plan, Asset Held for Investment, Party-in-Interest [true false] true  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Putnam Stable Value Fund [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Seagall Bryant & Hamill SM CP VAL INS    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 7,866,376  
Employee Benefit Plan, Investment, Number of Shares 525,125  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Seagall Bryantand Hamill SM CP VAL INS [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Mutual Fund [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Vanguard Institutional Index Fund    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 93,948,546  
Employee Benefit Plan, Investment, Number of Shares 170,172  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Vanguard Institutional Index Fund [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Mutual Fund [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Vanguard Small Cap Index Instl    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 13,690,528  
Employee Benefit Plan, Investment, Number of Shares 110,783  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Vanguard Small Cap Index Instl [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Mutual Fund [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Vanguard Target Retirement 2020 Trust II    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 13,930,303  
Employee Benefit Plan, Investment, Number of Shares 264,734  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Vanguard Target Retirement 2020 Trust II [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Vanguard Target Retirement 2025 Trust II    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 46,660,667  
Employee Benefit Plan, Investment, Number of Shares 823,230  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Vanguard Target Retirement 2025 Trust II [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Vanguard Target Retirement 2030 Trust II    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 77,449,021  
Employee Benefit Plan, Investment, Number of Shares 1,303,636  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Vanguard Target Retirement 2030 Trust II [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Vanguard Target Retirement 2035 Trust II    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 66,948,237  
Employee Benefit Plan, Investment, Number of Shares 1,054,635  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Vanguard Target Retirement 2035 Trust II [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Vanguard Target Retirement 2040 Trust II    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 50,684,801  
Employee Benefit Plan, Investment, Number of Shares 737,126  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Vanguard Target Retirement 2040 Trust II [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Vanguard Target Retirement 2045 Trust II    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 45,407,219  
Employee Benefit Plan, Investment, Number of Shares 626,047  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Vanguard Target Retirement 2045 Trust II [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Vanguard Target Retirement 2050 Trust II    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 49,481,970  
Employee Benefit Plan, Investment, Number of Shares 661,082  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Vanguard Target Retirement 2050 Trust II [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Vanguard Target Retirement 2055 Trust II    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 40,792,173  
Employee Benefit Plan, Investment, Number of Shares 406,864  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Vanguard Target Retirement 2055 Trust II [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Vanguard Target Retirement 2060 Trust II    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 21,559,964  
Employee Benefit Plan, Investment, Number of Shares 272,428  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Vanguard Target Retirement 2060 Trust II [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Vanguard Target Retirement 2065 Trust II    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 8,480,133  
Employee Benefit Plan, Investment, Number of Shares 174,059  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Vanguard Target Retirement 2065 Trust II [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Vanguard Target Retirement 2070 Trust II    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 1,952,908  
Employee Benefit Plan, Investment, Number of Shares 65,710  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Vanguard Target Retirement 2070 Trust II [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Vanguard Target Retirement Inc Trust II    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 3,771,366  
Employee Benefit Plan, Investment, Number of Shares 75,262  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Vanguard Target Retirement Inc Trust II [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Vanguard Total Bond Market Index Inst    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 18,400,652  
Employee Benefit Plan, Investment, Number of Shares 1,883,383  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Vanguard Total Bond Market Index Inst [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Mutual Fund [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
Investment, Identifier [Axis]: Vanguard Total Intl Stock Index Instl    
Employee Benefit Plan Statement Of Investment [Line Items]    
Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value $ 22,782,985  
Employee Benefit Plan, Investment, Number of Shares 140,558  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Vanguard Total Intl Stock Index Instl [Member]  
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Mutual Fund [Member]  
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan, Participant-Directed [Member]  
[1] In accordance with ASC 820-10, certain investments that were measured at net asset value per share (or its equivalent) have not been classified in the fair value hierarchy. The amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the line items presented in the statement of net assets available for benefits.
[2] Parties-in-Interest (See Note 6)