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| 0000104889-22-000035.txt | 2022-09-15 17:09:59 | |
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| a2022-09x15form8xkex991.htm | 7026 | 2022-09-15 17:09:59 |
| FilingSummary.xml | 1656 | 2022-09-15 17:09:59 |
| Financial_Report.xlsx | 5696 | 2022-09-15 17:09:59 |
| ghc-20220915.htm | 43492 | 2022-09-15 17:09:59 |
| ghc-20220915.xsd | 1900 | 2022-09-15 17:09:59 |
| ghc-20220915_htm.xml | 11373 | 2022-09-15 17:09:59 |
| ghc-20220915_lab.xml | 24137 | 2022-09-15 17:09:59 |
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| Show.js | 1084 | 2022-09-15 17:09:59 |