v3.26.1
Investor A C Institutional and Class R [Member] Expense Example - Investor A, C, Institutional and Class R - BlackRock LifePath Dynamic 2030 Fund
Dec. 31, 2025
USD ($)
Investor A Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 606
Expense Example, with Redemption, 3 Years 818
Expense Example, with Redemption, 5 Years 1,046
Expense Example, with Redemption, 10 Years 1,702
Institutional Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 60
Expense Example, with Redemption, 3 Years 230
Expense Example, with Redemption, 5 Years 415
Expense Example, with Redemption, 10 Years 948
Class R Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 106
Expense Example, with Redemption, 3 Years 372
Expense Example, with Redemption, 5 Years 657
Expense Example, with Redemption, 10 Years 1,472
Investor C Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 262
Expense Example, with Redemption, 3 Years 542
Expense Example, with Redemption, 5 Years 947
Expense Example, with Redemption, 10 Years $ 1,881