v3.26.1
Investor A C Institutional and Class R [Member] Expense Example - Investor A, C, Institutional and Class R - BlackRock LifePath Dynamic 2060 Fund
Dec. 31, 2025
USD ($)
Investor A Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 606
Expense Example, with Redemption, 3 Years 822
Expense Example, with Redemption, 5 Years 1,055
Expense Example, with Redemption, 10 Years 1,722
Investor C Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 262
Expense Example, with Redemption, 3 Years 546
Expense Example, with Redemption, 5 Years 955
Expense Example, with Redemption, 10 Years 1,901
Institutional Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 60
Expense Example, with Redemption, 3 Years 234
Expense Example, with Redemption, 5 Years 424
Expense Example, with Redemption, 10 Years 970
Class R Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 106
Expense Example, with Redemption, 3 Years 376
Expense Example, with Redemption, 5 Years 666
Expense Example, with Redemption, 10 Years $ 1,493