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Statement of Changes in Net Asset Available for Benefit (Statement) - EBP023 [Member]
12 Months Ended
Dec. 31, 2025
USD ($)
Additions to net assets:  
Plan interest in investment income of the Graham Holdings Company Master Trust $ 58,186,659
Contributions  
Participant 13,176,257
Rollovers 552,643
Total contributions 13,728,900
Interest income - notes receivable 144,386
Total additions 72,059,945
Deductions from net assets:  
Benefits paid to participants (30,267,618)
Administrative expenses (266,105)
Total deductions (30,533,723)
Net increase 41,526,222
Transfers (to) from affiliated plans  
Net transfers to other affiliated plans (1,307,667)
Net asset available for benefits, beginning of year 365,618,622
Net asset available for benefits, end of year 405,837,177
Notes receivable from participants 1,955,854
EBP, Receivable 2,342,927
401(k) Savings Plan for GHC Affiliates [Member]  
Transfers (to) from affiliated plans  
Transfers from affiliated plans 1,187,240
Transfers to affiliated plans 1,813,308
Savings Plan for Graham Holdings Company [Member]  
Transfers (to) from affiliated plans  
Transfers to affiliated plans $ 681,599