S000003895 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Russell 3000 Index (no deduction for fees, expenses or taxes) | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 17.15% | 13.15% | 14.29% |
| Bloomberg U.S. Aggregate Index (no deduction for fees, expenses or taxes) | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 7.30% | (0.36%) | 2.01% |
| George Putnam Blended Index (no deduction for fees, expenses or taxes) | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 14.02% | 8.64% | 9.98% |
| Class IA Shares | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 14.31% | 9.11% | 10.44% |
| Class IB Shares | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 13.95% | 8.85% | 10.17% |