Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000104889-23-000064-index-headers.html | 2023-11-01 08:35:05 | |
| 0000104889-23-000064-index.html | 2023-11-01 08:35:05 | |
| 0000104889-23-000064.txt | 2023-11-01 08:35:05 | |
 0000104889-23-000064-xbrl.zip | 369877 | 2023-11-01 08:35:05 |
| a2023q310-qex311.htm | 9470 | 2023-11-01 08:35:05 |
| a2023q310-qex312.htm | 9464 | 2023-11-01 08:35:05 |
| a2023q310-qex32.htm | 5383 | 2023-11-01 08:35:05 |
| a2023q310-qex44.htm | 18499 | 2023-11-01 08:35:05 |
| FilingSummary.xml | 48980 | 2023-11-01 08:35:05 |
| Financial_Report.xlsx | 145764 | 2023-11-01 08:35:05 |
| ghc-20230930.htm | 2200219 | 2023-11-01 08:35:05 |
| ghc-20230930.xsd | 91108 | 2023-11-01 08:35:05 |
| ghc-20230930_cal.xml | 130118 | 2023-11-01 08:35:05 |
| ghc-20230930_def.xml | 597998 | 2023-11-01 08:35:05 |
| ghc-20230930_htm.xml | 2525346 | 2023-11-01 08:35:05 |
| ghc-20230930_lab.xml | 1023659 | 2023-11-01 08:35:05 |
| ghc-20230930_pre.xml | 754337 | 2023-11-01 08:35:05 |
| MetaLinks.json | 1162881 | 2023-11-01 08:35:05 |
| R1.htm | 53006 | 2023-11-01 08:35:05 |
| R10.htm | 33514 | 2023-11-01 08:35:05 |
| R11.htm | 23894 | 2023-11-01 08:35:05 |
| R12.htm | 12542 | 2023-11-01 08:35:05 |
| R13.htm | 114747 | 2023-11-01 08:35:05 |
| R14.htm | 49394 | 2023-11-01 08:35:05 |
| R15.htm | 89684 | 2023-11-01 08:35:05 |
| R16.htm | 23132 | 2023-11-01 08:35:05 |
| R17.htm | 53822 | 2023-11-01 08:35:05 |
| R18.htm | 71424 | 2023-11-01 08:35:05 |
| R19.htm | 25814 | 2023-11-01 08:35:05 |
| R2.htm | 105469 | 2023-11-01 08:35:05 |
| R20.htm | 109877 | 2023-11-01 08:35:05 |
| R21.htm | 11694 | 2023-11-01 08:35:05 |
| R22.htm | 292151 | 2023-11-01 08:35:05 |
| R23.htm | 13605 | 2023-11-01 08:35:05 |
| R24.htm | 32519 | 2023-11-01 08:35:05 |
| R25.htm | 24412 | 2023-11-01 08:35:05 |
| R26.htm | 21387 | 2023-11-01 08:35:05 |
| R27.htm | 13481 | 2023-11-01 08:35:05 |
| R28.htm | 116523 | 2023-11-01 08:35:05 |
| R29.htm | 35480 | 2023-11-01 08:35:05 |
| R3.htm | 59510 | 2023-11-01 08:35:05 |
| R30.htm | 90370 | 2023-11-01 08:35:05 |
| R31.htm | 17513 | 2023-11-01 08:35:05 |
| R32.htm | 53926 | 2023-11-01 08:35:05 |
| R33.htm | 68609 | 2023-11-01 08:35:05 |
| R34.htm | 23424 | 2023-11-01 08:35:05 |
| R35.htm | 113272 | 2023-11-01 08:35:05 |
| R36.htm | 242961 | 2023-11-01 08:35:05 |
| R37.htm | 6768 | 2023-11-01 08:35:05 |
| R38.htm | 51020 | 2023-11-01 08:35:05 |
| R39.htm | 38422 | 2023-11-01 08:35:05 |
| R4.htm | 161793 | 2023-11-01 08:35:05 |
| R40.htm | 7974 | 2023-11-01 08:35:05 |
| R41.htm | 124377 | 2023-11-01 08:35:05 |
| R42.htm | 10320 | 2023-11-01 08:35:05 |
| R43.htm | 9845 | 2023-11-01 08:35:05 |
| R44.htm | 26211 | 2023-11-01 08:35:05 |
| R45.htm | 11945 | 2023-11-01 08:35:05 |
| R46.htm | 13012 | 2023-11-01 08:35:05 |
| R47.htm | 13535 | 2023-11-01 08:35:05 |
| R48.htm | 26910 | 2023-11-01 08:35:05 |
| R49.htm | 23276 | 2023-11-01 08:35:05 |
| R5.htm | 5022 | 2023-11-01 08:35:05 |
| R50.htm | 58447 | 2023-11-01 08:35:05 |
| R51.htm | 54886 | 2023-11-01 08:35:05 |
| R52.htm | 130841 | 2023-11-01 08:35:05 |
| R53.htm | 94112 | 2023-11-01 08:35:05 |
| R54.htm | 7147 | 2023-11-01 08:35:05 |
| R55.htm | 50652 | 2023-11-01 08:35:05 |
| R56.htm | 24815 | 2023-11-01 08:35:05 |
| R57.htm | 40463 | 2023-11-01 08:35:05 |
| R58.htm | 12653 | 2023-11-01 08:35:05 |
| R59.htm | 6144 | 2023-11-01 08:35:05 |
| R6.htm | 114497 | 2023-11-01 08:35:05 |
| R60.htm | 9730 | 2023-11-01 08:35:05 |
| R61.htm | 17303 | 2023-11-01 08:35:05 |
| R62.htm | 61990 | 2023-11-01 08:35:05 |
| R63.htm | 17545 | 2023-11-01 08:35:05 |
| R64.htm | 62855 | 2023-11-01 08:35:05 |
| R65.htm | 36285 | 2023-11-01 08:35:05 |
| R66.htm | 16338 | 2023-11-01 08:35:05 |
| R67.htm | 13536 | 2023-11-01 08:35:05 |
| R68.htm | 21139 | 2023-11-01 08:35:05 |
| R69.htm | 58511 | 2023-11-01 08:35:05 |
| R7.htm | 143709 | 2023-11-01 08:35:05 |
| R70.htm | 51790 | 2023-11-01 08:35:05 |
| R71.htm | 59829 | 2023-11-01 08:35:05 |
| R72.htm | 19785 | 2023-11-01 08:35:05 |
| R73.htm | 4663 | 2023-11-01 08:35:05 |
| R74.htm | 128807 | 2023-11-01 08:35:05 |
| R8.htm | 11436 | 2023-11-01 08:35:05 |
| R9.htm | 39514 | 2023-11-01 08:35:05 |
| report.css | 2767 | 2023-11-01 08:35:05 |
| Show.js | 1085 | 2023-11-01 08:35:05 |