Shareholder Report, Holdings (Details)	Apr. 30, 2026
C000254885 \| iShares iBonds Dec 2026 Term Corporate ETF
Holdings [Line Items]
Percent of Total Investments	20.00%
C000254885 \| iShares iBonds Dec 2027 Term Corporate ETF
Holdings [Line Items]
Percent of Total Investments	20.00%
C000254885 \| iShares iBonds Dec 2029 Term Corporate ETF
Holdings [Line Items]
Percent of Total Investments	20.00%
C000254885 \| iShares iBonds Dec 2030 Term Corporate ETF
Holdings [Line Items]
Percent of Total Investments	20.00%
C000254885 \| iShares iBonds Dec 2028 Term Corporate ETF
Holdings [Line Items]
Percent of Total Investments	20.00%
C000254885 \| Domestic Fixed Income
Holdings [Line Items]
Percent of Total Investments	100.00%
C000254886 \| iShares iBonds 2030 Term High Yield and Income ETF
Holdings [Line Items]
Percent of Total Investments	20.10%
C000254886 \| iShares iBonds 2028 Term High Yield and Income ETF
Holdings [Line Items]
Percent of Total Investments	20.10%
C000254886 \| iShares iBonds 2029 Term High Yield and Income ETF
Holdings [Line Items]
Percent of Total Investments	20.00%
C000254886 \| iShares iBonds 2026 Term High Yield and Income ETF
Holdings [Line Items]
Percent of Total Investments	19.90%
C000254886 \| iShares iBonds 2027 Term High Yield and Income ETF
Holdings [Line Items]
Percent of Total Investments	19.90%
C000254886 \| Domestic Fixed Income
Holdings [Line Items]
Percent of Total Investments	100.00%
C000254887 \| iShares iBonds Oct 2028 Term TIPS ETF
Holdings [Line Items]
Percent of Total Investments	20.00%
C000254887 \| iShares iBonds Oct 2029 Term TIPS ETF
Holdings [Line Items]
Percent of Total Investments	20.00%
C000254887 \| iShares iBonds Oct 2026 Term TIPS ETF
Holdings [Line Items]
Percent of Total Investments	20.00%
C000254887 \| iShares iBonds Oct 2030 Term TIPS ETF
Holdings [Line Items]
Percent of Total Investments	20.00%
C000254887 \| iShares iBonds Oct 2027 Term TIPS ETF
Holdings [Line Items]
Percent of Total Investments	20.00%
C000254887 \| Domestic Fixed Income
Holdings [Line Items]
Percent of Total Investments	100.00%
C000254888 \| iShares iBonds Dec 2026 Term Treasury ETF
Holdings [Line Items]
Percent of Total Investments	20.10%
C000254888 \| iShares iBonds Dec 2027 Term Treasury ETF
Holdings [Line Items]
Percent of Total Investments	20.00%
C000254888 \| iShares iBonds Dec 2028 Term Treasury ETF
Holdings [Line Items]
Percent of Total Investments	20.00%
C000254888 \| iShares iBonds Dec 2029 Term Treasury ETF
Holdings [Line Items]
Percent of Total Investments	20.00%
C000254888 \| iShares iBonds Dec 2030 Term Treasury ETF
Holdings [Line Items]
Percent of Total Investments	19.90%
C000254888 \| Domestic Fixed Income
Holdings [Line Items]
Percent of Total Investments	100.00%

C000254885 | iShares iBonds Dec 2026 Term Corporate ETF