| EBP, Schedule of Asset Held for Investment [Text Block] |
| | | | | | | | | | | | | Name of Issuer and Title of Issue | Number of Units/Shares | | Current Value | | Investments: | | | | | American Funds EuroPacific Growth Fund (Class R-6) | 1,209,364 | | | $ | 73,263,277 | | Baird Aggregate Bond Fund (Institutional Shares) | 4,666,543 | | | 46,385,434 | | Dimensional Fund Advisors U.S. Small Cap Portfolio (I) Fund | 1,265,500 | | | 66,160,317 | | | Invesco Stable Value Trust Fund (Class B1) | 50,876,720 | | | 138,640,640 | | Publix Stock Fund: | | | | Common stock of Publix Super Markets, Inc. * | 279,232,032 | | | 5,486,909,421 | | State Street Institutional U.S. Government Money Market Fund (Premier Class) * | 2,493,892 | | | 45,273,261 | | | State Street S&P 500 Index Fund (Class II) * | 15,626,494 | | | 476,639,305 | | State Street S&P Mid Cap Index Fund (Class XIV) * | 3,571,392 | | | 97,763,273 | | | State Street Target Retirement Funds: | | | | | State Street Target Retirement 2025 Fund (Class I) * | 4,920,159 | | | 55,157,752 | | | State Street Target Retirement 2030 Fund (Class I) * | 9,426,245 | | | 108,791,160 | | | State Street Target Retirement 2035 Fund (Class I) * | 10,309,977 | | | 121,437,361 | | | State Street Target Retirement 2040 Fund (Class I) * | 9,363,308 | | | 111,669,766 | | | State Street Target Retirement 2045 Fund (Class I) * | 9,334,975 | | | 112,454,575 | | | State Street Target Retirement 2050 Fund (Class I) * | 10,878,468 | | | 132,163,285 | | | State Street Target Retirement 2055 Fund (Class I) * | 11,763,735 | | | 143,488,214 | | | State Street Target Retirement 2060 Fund (Class I) * | 10,233,500 | | | 124,825,483 | | | State Street Target Retirement 2065 Fund (Class I) * | 7,368,265 | | | 89,856,511 | | | State Street Target Retirement 2070 Fund (Class I) * | 1,677,453 | | | 20,460,552 | | | State Street Target Retirement Fund (Class I) * | 2,799,881 | | | 30,710,574 | | | T. Rowe Price Large Cap Growth Trust Fund (Class D) | 22,759,823 | | | 622,481,160 | | | T. Rowe Price U.S. Value Equity Trust Fund (Class B) | 2,846,131 | | | 142,875,777 | | Total investments | | | 8,247,407,098 | | Notes receivable from participants with interest rates ranging from 3.25% - 8.50% * | | | 177,241,098 | | | | | $ | 8,424,648,196 | | | | | | | * Parties-in-interest | | | | | | | | | See accompanying report of independent registered public accounting firm. | | | |
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