000000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 000011 - Document - Risk/Return Summary {Unlabeled} - (BlackRock California Municipal Bond Fund) (Investor and Institutional Shares) link:presentationLink link:calculationLink link:definitionLink 000012 - Schedule - Shareholder Fees - {BlackRock California Municipal Bond Fund} link:presentationLink link:calculationLink link:definitionLink 000013 - Schedule - Annual Fund Operating Expenses - {BlackRock California Municipal Bond Fund} link:presentationLink link:calculationLink link:definitionLink 000014 - Schedule - Expense Example {Transposed} - {BlackRock California Municipal Bond Fund} link:presentationLink link:calculationLink link:definitionLink 000015 - Schedule - Expense Example, No Redemption {Transposed} - {BlackRock California Municipal Bond Fund} link:presentationLink link:calculationLink link:definitionLink 000016 - Schedule - Annual Total Returns - BlackRock California Municipal Bond Fund [BarChart] link:presentationLink link:calculationLink link:definitionLink 000017 - Schedule - Average Annual Total Returns {Transposed} - {BlackRock California Municipal Bond Fund} link:presentationLink link:calculationLink link:definitionLink 000018 - Document - Risk/Return Detail {Unlabeled} - BlackRock California Municipal Bond Fund link:presentationLink link:calculationLink link:definitionLink 000019 - Disclosure - Risk/Return Detail Data {Elements} - (BlackRock California Municipal Bond Fund) (Investor and Institutional Shares) link:presentationLink link:calculationLink link:definitionLink 000021 - Document - Risk/Return Summary {Unlabeled} - (BlackRock California Municipal Bond Fund) (Prime Shares) link:presentationLink link:calculationLink link:definitionLink 000022 - Schedule - Shareholder Fees - {BlackRock California Municipal Bond Fund Class A1 C1 Prospectus} link:presentationLink link:calculationLink link:definitionLink 000023 - Schedule - Annual Fund Operating Expenses - {BlackRock California Municipal Bond Fund Class A1 C1 Prospectus} link:presentationLink link:calculationLink link:definitionLink 000024 - Schedule - Expense Example {Transposed} - {BlackRock California Municipal Bond Fund Class A1 C1 Prospectus} link:presentationLink link:calculationLink link:definitionLink 000025 - Schedule - Expense Example, No Redemption {Transposed} - {BlackRock California Municipal Bond Fund Class A1 C1 Prospectus} link:presentationLink link:calculationLink link:definitionLink 000026 - Schedule - Annual Total Returns - BlackRock California Municipal Bond Fund Class A1 C1 Prospectus [BarChart] link:presentationLink link:calculationLink link:definitionLink 000027 - Schedule - Average Annual Total Returns {Transposed} - {BlackRock California Municipal Bond Fund Class A1 C1 Prospectus} link:presentationLink link:calculationLink link:definitionLink 000028 - Document - Risk/Return Detail {Unlabeled} - BlackRock California Municipal Bond Fund Class A1 C1 Prospectus link:presentationLink link:calculationLink link:definitionLink 000029 - Disclosure - Risk/Return Detail Data {Elements} - (BlackRock California Municipal Bond Fund) (Prime Shares) link:presentationLink link:calculationLink link:definitionLink