Class K [Member] Investment Objectives and Goals - Class K - BLACKROCK GLOBAL DIVIDEND PORTFOLIO |
May 31, 2026 |
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| Prospectus [Line Items] | |
| Risk/Return [Heading] | Fund Overview Key Facts About BlackRock Global Dividend Portfolio |
| Objective [Heading] | Investment Objective |
| Objective, Primary [Text Block] | The investment objective of BlackRock Global Dividend Portfolio (the “Fund”), a series of BlackRock Funds II (the “Trust”), is to seek to provide a level of current income that exceeds the average yield on global stocks generally. Additionally, the Fund seeks to provide long-term capital appreciation.
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