v3.26.1
Expense Example
Jul. 27, 2026
USD ($)
T. Rowe Price Spectrum Moderate Allocation Fund-Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 78
Expense Example, with Redemption, 3 Years 243
Expense Example, with Redemption, 5 Years 422
Expense Example, with Redemption, 10 Years 942
T. Rowe Price Spectrum Moderate Allocation Fund-I Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 63
Expense Example, with Redemption, 3 Years 199
Expense Example, with Redemption, 5 Years 346
Expense Example, with Redemption, 10 Years 774
T. Rowe Price Spectrum Moderate Growth Allocation Fund-Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 80
Expense Example, with Redemption, 3 Years 249
Expense Example, with Redemption, 5 Years 433
Expense Example, with Redemption, 10 Years 966
T. Rowe Price Spectrum Moderate Growth Allocation Fund-I Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 64
Expense Example, with Redemption, 3 Years 202
Expense Example, with Redemption, 5 Years 351
Expense Example, with Redemption, 10 Years 786
T. Rowe Price Spectrum Conservative Allocation Fund-Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 67
Expense Example, with Redemption, 3 Years 211
Expense Example, with Redemption, 5 Years 368
Expense Example, with Redemption, 10 Years 822
T. Rowe Price Spectrum Conservative Allocation Fund-I Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 54
Expense Example, with Redemption, 3 Years 170
Expense Example, with Redemption, 5 Years 296
Expense Example, with Redemption, 10 Years $ 665