BlackRock 20/80 Target Allocation Fund, Investor A (BACPX) N-CSRS4 Sep 24Certified semi-annual shareholder report (management investment company)Financial data

Company Profile

Form N-CSR Cover

Form N-CSR Cover	6 Months Ended
Form N-CSR Cover	Jun. 30, 2024
Shareholder Report [Line Items]
Document Type	N-CSRS
Amendment Flag	false
Registrant Name	BlackRock Funds
Entity Central Index Key	0000844779
Document Period End Date	Jun. 30, 2024

Shareholder Report

Shareholder Report	6 Months Ended
Shareholder Report	Jun. 30, 2024 USD ($) Holding
Shareholder Report [Line Items]
Document Type	N-CSRS
Amendment Flag	false
Registrant Name	BlackRock Funds
Entity Central Index Key	0000844779
Document Period End Date	Jun. 30, 2024
C000166149 [Member]
Shareholder Report [Line Items]
Fund Name	iShares Short-Term TIPS Bond Index Fund
Class Name	Institutional Shares
Trading Symbol	BIIPX
Annual or Semi-Annual Statement [Text Block]	This semi-annual shareholder report contains important information about iShares Short-Term TIPS Bond Index Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024.
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at blackrock.com/fundreports
Additional Information Phone Number	(800) 441‑7762
Additional Information Website	blackrock.com/fundreports
Expenses [Text Block]	What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Institutional Shares $ 0.11 %
Expenses Paid, Amount	$ 6
Expense Ratio, Percent	0.11%
Performance Past Does Not Indicate Future [Text]	Past performance is not an indication of future results.
Average Annual Return [Table Text Block]	Average annual total returns 6-Month 1 Year 5 Years Since Institutional Shares 2.34 ) % 5.29 % 3.03 ) % 2.67 % ICE BofA US Broad Market Index (0.47 ) % 2.71 % (0.23 ) % 1.11 % Bloomberg U.S. Treasury Inflation-Protected Securities (TIPS) 0-5 Years Index (Series-L) 2.26 ) % 5.37 % 3.16 ) % 2.77 %
Performance Inception Date	Feb. 16, 2016
No Deduction of Taxes [Text Block]	Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block]	Visit blackrock.com
Net Assets	$ 299,009,907
Holdings Count \| Holding	28
Investment Company Portfolio Turnover	9%
Additional Fund Statistics [Text Block]	Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Portfolio Turnover Rate $ %
Holdings [Text Block]	What did the Fund invest in? (as of June 30, 2024) Maturity allocation Period Percent of (a) 1-2 Years 23.0 % 2-3 Years 23.6 % 3-4 Years 27.0 % 4-5 Years 26.4 % Five largest holdings Security Percent of (a) U.S. Treasury Inflation-Indexed Notes, 2.38%, 10/15/28 5.6 % U.S. Treasury Inflation-Indexed Notes, 2.13%, 04/15/29 5.0 % U.S. Treasury Inflation-Indexed Notes, 0.38%, 07/15/25 4.9 % U.S. Treasury Inflation-Indexed Notes, 1.25%, 04/15/28 4.8 % U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/27 4.8 % (a) Excludes short-term securities.
Largest Holdings [Text Block]	Five largest holdings Security Percent of (a) U.S. Treasury Inflation-Indexed Notes, 2.38%, 10/15/28 5.6 % U.S. Treasury Inflation-Indexed Notes, 2.13%, 04/15/29 5.0 % U.S. Treasury Inflation-Indexed Notes, 0.38%, 07/15/25 4.9 % U.S. Treasury Inflation-Indexed Notes, 1.25%, 04/15/28 4.8 % U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/27 4.8 % (a) Excludes short-term securities.
C000166148 [Member]
Shareholder Report [Line Items]
Fund Name	iShares Short-Term TIPS Bond Index Fund
Class Name	Investor A Shares
Trading Symbol	BAIPX
Annual or Semi-Annual Statement [Text Block]	This semi-annual shareholder report contains important information about iShares Short-Term TIPS Bond Index Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024.
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at blackrock.com/fundreports
Additional Information Phone Number	(800) 441‑7762.
Additional Information Website	blackrock.com/fundreports.
Expenses [Text Block]	What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Investor A Shares $ 0.36 %
Expenses Paid, Amount	$ 18
Expense Ratio, Percent	0.36%
Performance Past Does Not Indicate Future [Text]	Past performance is not an indication of future results.
Average Annual Return [Table Text Block]	Average annual total returns 6-Month 1 Year 5 Years Since Investor A Shares 2.20 ) % 5.02 % 2.76 ) % 2.40 % ICE BofA US Broad Market Index (0.47 ) % 2.71 % (0.23 ) % 1.11 % Bloomberg U.S. Treasury Inflation-Protected Securities (TIPS) 0-5 Years Index (Series-L) 2.26 ) % 5.37 % 3.16 ) % 2.77 %
Performance Inception Date	Feb. 16, 2016
No Deduction of Taxes [Text Block]	Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block]	Visit blackrock.com
Net Assets	$ 299,009,907
Holdings Count \| Holding	28
Investment Company Portfolio Turnover	9%
Additional Fund Statistics [Text Block]	Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Portfolio Turnover Rate $ %
Holdings [Text Block]	What did the Fund invest in? (as of June 30, 2024) Maturity allocation Period Percent of (a) 1-2 Years 23.0 % 2-3 Years 23.6 % 3-4 Years 27.0 % 4-5 Years 26.4 % Five largest holdings Security Percent of (a) U.S. Treasury Inflation-Indexed Notes, 2.38%, 10/15/28 5.6 % U.S. Treasury Inflation-Indexed Notes, 2.13%, 04/15/29 5.0 % U.S. Treasury Inflation-Indexed Notes, 0.38%, 07/15/25 4.9 % U.S. Treasury Inflation-Indexed Notes, 1.25%, 04/15/28 4.8 % U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/27 4.8 % (a) Excludes short-term securities.
Largest Holdings [Text Block]	Five largest holdings Security Percent of (a) U.S. Treasury Inflation-Indexed Notes, 2.38%, 10/15/28 5.6 % U.S. Treasury Inflation-Indexed Notes, 2.13%, 04/15/29 5.0 % U.S. Treasury Inflation-Indexed Notes, 0.38%, 07/15/25 4.9 % U.S. Treasury Inflation-Indexed Notes, 1.25%, 04/15/28 4.8 % U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/27 4.8 % (a) Excludes short-term securities.
C000166150 [Member]
Shareholder Report [Line Items]
Fund Name	iShares Short-Term TIPS Bond Index Fund
Class Name	Class K Shares
Trading Symbol	BKIPX
Annual or Semi-Annual Statement [Text Block]	This semi-annual shareholder report contains important information about iShares Short-Term TIPS Bond Index Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024.
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at blackrock.com/fundreports
Additional Information Phone Number	(800) 441‑7762
Additional Information Website	blackrock.com/fundreports
Expenses [Text Block]	What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Class K Shares $ 0.06 %
Expenses Paid, Amount	$ 3
Expense Ratio, Percent	0.06%
Performance Past Does Not Indicate Future [Text]	Past performance is not an indication of future results.
Average Annual Return [Table Text Block]	Average annual total returns 6-Month 1 Year 5 Years Since Class K Shares 2.36 ) % 5.35 % 3.07 ) % 2.69 % ICE BofA US Broad Market Index (0.47 ) % 2.71 % (0.23 ) % 1.11 % Bloomberg U.S. Treasury Inflation-Protected Securities (TIPS) 0-5 Years Index (Series-L) 2.26 ) % 5.37 % 3.16 ) % 2.77 %
Performance Inception Date	Feb. 16, 2016
No Deduction of Taxes [Text Block]	Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block]	Visit blackrock.com
Net Assets	$ 299,009,907
Holdings Count \| Holding	28
Investment Company Portfolio Turnover	9%
Additional Fund Statistics [Text Block]	Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Portfolio Turnover Rate $ %
Holdings [Text Block]	What did the Fund invest in? (as of June 30, 2024) Maturity allocation Period Percent of (a) 1-2 Years 23.0 % 2-3 Years 23.6 % 3-4 Years 27.0 % 4-5 Years 26.4 % Five largest holdings Security Percent of (a) U.S. Treasury Inflation-Indexed Notes, 2.38%, 10/15/28 5.6 % U.S. Treasury Inflation-Indexed Notes, 2.13%, 04/15/29 5.0 % U.S. Treasury Inflation-Indexed Notes, 0.38%, 07/15/25 4.9 % U.S. Treasury Inflation-Indexed Notes, 1.25%, 04/15/28 4.8 % U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/27 4.8 % (a) Excludes short-term securities.
Largest Holdings [Text Block]	Five largest holdings Security Percent of (a) U.S. Treasury Inflation-Indexed Notes, 2.38%, 10/15/28 5.6 % U.S. Treasury Inflation-Indexed Notes, 2.13%, 04/15/29 5.0 % U.S. Treasury Inflation-Indexed Notes, 0.38%, 07/15/25 4.9 % U.S. Treasury Inflation-Indexed Notes, 1.25%, 04/15/28 4.8 % U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/27 4.8 % (a) Excludes short-term securities.
C000195948 [Member]
Shareholder Report [Line Items]
Fund Name	iShares Municipal Bond Index Fund
Class Name	Institutional Shares
Trading Symbol	BIDIX
Annual or Semi-Annual Statement [Text Block]	This semi-annual shareholder report contains important information about iShares Municipal Bond Index Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024.
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at blackrock.com/fundreports
Additional Information Phone Number	(800) 441‑7762
Additional Information Website	blackrock.com/fundreports
Expenses [Text Block]	What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Institutional Shares $ 0.25 %
Expenses Paid, Amount	$ 12
Expense Ratio, Percent	0.25%
Performance Past Does Not Indicate Future [Text]	Past performance is not an indication of future results.
Average Annual Return [Table Text Block]	Average annual total returns 6-Month 1 Year 5 Years 10 Years Institutional Shares (0.33 ) % 3.19 % 1.09 % 2.19 % ICE BofA US Municipal Securities Index (0.06 ) % 3.49 % 1.19 % 2.46 %
No Deduction of Taxes [Text Block]	Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block]	Visit blackrock.com
Net Assets	$ 242,270,439
Holdings Count \| Holding	269
Investment Company Portfolio Turnover	2%
Additional Fund Statistics [Text Block]	Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Portfolio Turnover Rate $ %
Holdings [Text Block]	What did the Fund invest in? (as of June 30, 2024) Sector allocation Sector (a) Percent of (b) Transportation 29.5 % State 26.1 % County/City/Special District/School District 17.8 % Utilities 12.3 % Health 6.8 % Education 6.6 % Housing 0.9 % Credit quality allocation Credit Rating (c) Percent of (b) AAA/Aaa 21.8 % AA/Aa 59.3 % A 17.6 % BBB/Baa 0.5 % N/R 0.8 % (a) For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. (b) Excludes short-term securities. (c) For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
Credit Ratings Selection [Text Block]	For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
C000195947 [Member]
Shareholder Report [Line Items]
Fund Name	iShares Municipal Bond Index Fund
Class Name	Investor A Shares
Trading Symbol	BIDAX
Annual or Semi-Annual Statement [Text Block]	This semi-annual shareholder report contains important information about iShares Municipal Bond Index Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024.
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at blackrock.com/fundreports
Additional Information Phone Number	(800) 441‑7762
Additional Information Website	blackrock.com/fundreports
Expenses [Text Block]	What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Investor A Shares $ 0.50 %
Expenses Paid, Amount	$ 25
Expense Ratio, Percent	0.50%
Performance Past Does Not Indicate Future [Text]	Past performance is not an indication of future results.
Average Annual Return [Table Text Block]	Average annual total returns 6-Month 1 Year 5 Years 10 Years Investor A Shares (0.46 ) % 2.93 % 0.85 % 2.04 % ICE BofA US Municipal Securities Index (0.06 ) % 3.49 % 1.19 % 2.46 %
No Deduction of Taxes [Text Block]	Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block]	Visit blackrock.com
Net Assets	$ 242,270,439
Holdings Count \| Holding	269
Investment Company Portfolio Turnover	2%
Additional Fund Statistics [Text Block]	Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Portfolio Turnover Rate $ %
Holdings [Text Block]	What did the Fund invest in? (as of June 30, 2024) Sector allocation Sector (a) Percent of (b) Transportation 29.5 % State 26.1 % County/City/Special District/School District 17.8 % Utilities 12.3 % Health 6.8 % Education 6.6 % Housing 0.9 % Credit quality allocation Credit Rating (c) Percent of (b) AAA/Aaa 21.8 % AA/Aa 59.3 % A 17.6 % BBB/Baa 0.5 % N/R 0.8 % (a) For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. (b) Excludes short-term securities. (c) For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
Credit Ratings Selection [Text Block]	For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
C000201952 [Member]
Shareholder Report [Line Items]
Fund Name	iShares Municipal Bond Index Fund
Class Name	Investor P Shares
Trading Symbol	BIDPX
Annual or Semi-Annual Statement [Text Block]	This semi-annual shareholder report contains important information about iShares Municipal Bond Index Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024.
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at blackrock.com/fundreports
Additional Information Phone Number	(800) 441‑7762
Additional Information Website	blackrock.com/fundreports
Expenses [Text Block]	What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Investor P Shares $ 0.50 %
Expenses Paid, Amount	$ 25
Expense Ratio, Percent	0.50%
Performance Past Does Not Indicate Future [Text]	Past performance is not an indication of future results.
Average Annual Return [Table Text Block]	Average annual total returns 6-Month 1 Year 5 Years 10 Years Investor P Shares (0.46 ) % 2.94 ) % 0.85 % 2.04 % Investor P Shares (with sales charge) (4.44 ) % (1.18 ) % 0.03 % 1.63 % ICE BofA US Municipal Securities Index (0.06 ) % 3.49 ) % 1.19 % 2.46 %
No Deduction of Taxes [Text Block]	Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block]	Visit blackrock.com
Net Assets	$ 242,270,439
Holdings Count \| Holding	269
Investment Company Portfolio Turnover	2%
Additional Fund Statistics [Text Block]	Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Portfolio Turnover Rate $ %
Holdings [Text Block]	What did the Fund invest in? (as of June 30, 2024) Sector allocation Sector (a) Percent of (b) Transportation 29.5 % State 26.1 % County/City/Special District/School District 17.8 % Utilities 12.3 % Health 6.8 % Education 6.6 % Housing 0.9 % Credit quality allocation Credit Rating (c) Percent of (b) AAA/Aaa 21.8 % AA/Aa 59.3 % A 17.6 % BBB/Baa 0.5 % N/R 0.8 % (a) For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. (b) Excludes short-term securities. (c) For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
Credit Ratings Selection [Text Block]	For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
C000195949 [Member]
Shareholder Report [Line Items]
Fund Name	iShares Municipal Bond Index Fund
Class Name	Class K Shares
Trading Symbol	BIDKX
Annual or Semi-Annual Statement [Text Block]	This semi-annual shareholder report contains important information about iShares Municipal Bond Index Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024.
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at blackrock.com/fundreports
Additional Information Phone Number	(800) 441‑7762
Additional Information Website	blackrock.com/fundreports
Expenses [Text Block]	What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Class K Shares $ 0.20 %
Expenses Paid, Amount	$ 10
Expense Ratio, Percent	0.20%
Performance Past Does Not Indicate Future [Text]	Past performance is not an indication of future results.
Average Annual Return [Table Text Block]	Average annual total returns 6-Month 1 Year 5 Years 10 Years Class K Shares (0.31 ) % 3.24 % 1.14 % 2.21 % ICE BofA US Municipal Securities Index (0.06 ) % 3.49 % 1.19 % 2.46 %
No Deduction of Taxes [Text Block]	Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block]	Visit blackrock.com
Net Assets	$ 242,270,439
Holdings Count \| Holding	269
Investment Company Portfolio Turnover	2%
Additional Fund Statistics [Text Block]	Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Portfolio Turnover Rate $ %
Holdings [Text Block]	What did the Fund invest in? (as of June 30, 2024) Sector allocation Sector (a) Percent of (b) Transportation 29.5 % State 26.1 % County/City/Special District/School District 17.8 % Utilities 12.3 % Health 6.8 % Education 6.6 % Housing 0.9 % Credit quality allocation Credit Rating (c) Percent of (b) AAA/Aaa 21.8 % AA/Aa 59.3 % A 17.6 % BBB/Baa 0.5 % N/R 0.8 % (a) For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. (b) Excludes short-term securities. (c) For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
Credit Ratings Selection [Text Block]	For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.

Shareholder Report, Line Graph

Shareholder Report, Line Graph (Details)	6 Months Ended	12 Months Ended	60 Months Ended	101 Months Ended	120 Months Ended
Shareholder Report, Line Graph (Details)	Jun. 30, 2024	Jun. 30, 2024	Jun. 30, 2024	Jun. 30, 2024	Jun. 30, 2024
C000166149 [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Institutional Shares
Average Annual Return, Percent	2.34%	5.29%	3.03%	2.67%
C000166148 [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Investor A Shares
Average Annual Return, Percent	2.20%	5.02%	2.76%	2.40%
C000166150 [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class K Shares
Average Annual Return, Percent	2.36%	5.35%	3.07%	2.69%
C000195948 [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Institutional Shares
Average Annual Return, Percent	(0.33%)	3.19%	1.09%		2.19%
C000195947 [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Investor A Shares
Average Annual Return, Percent	(0.46%)	2.93%	0.85%		2.04%
C000201952 [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Investor P Shares (with sales charge)
Average Annual Return, Percent	(4.44%)	(1.18%)	0.03%		1.63%
C000201952 [Member] \| Without Sales Load [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Investor P Shares
Average Annual Return, Percent	(0.46%)	2.94%	0.85%		2.04%
C000195949 [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class K Shares
Average Annual Return, Percent	(0.31%)	3.24%	1.14%		2.21%
ICE BofA US Broad Market Index [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	ICE BofA US Broad Market Index
Average Annual Return, Percent	(0.47%)	2.71%	(0.23%)	1.11%
ICE BofA US Municipal Securities Index [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	ICE BofA US Municipal Securities Index
Average Annual Return, Percent	(0.06%)	3.49%	1.19%		2.46%
Bloomberg U S Treasury Inflation Protected Securities TIPS 0 5 Years Index Series L [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Bloomberg U.S. Treasury Inflation-Protected Securities (TIPS) 0-5 Years Index (Series-L)
Average Annual Return, Percent	2.26%	5.37%	3.16%	2.77%

Shareholder Report, Holdings (D

Shareholder Report, Holdings (Details)	Jun. 30, 2024
C000166149 [Member] \| U S Treasury Inflation Indexed Notes 2 38 10 15 28 [Member]
Holdings [Line Items]
Percent of Total Investments	5.60%	[1]
C000166149 [Member] \| U S Treasury Inflation Indexed Notes 2 13 04 15 29 [Member]
Holdings [Line Items]
Percent of Total Investments	5%	[1]
C000166149 [Member] \| U S Treasury Inflation Indexed Notes 0 38 07 15 25 [Member]
Holdings [Line Items]
Percent of Total Investments	4.90%	[1]
C000166149 [Member] \| U S Treasury Inflation Indexed Notes 1 25 04 15 28 [Member]
Holdings [Line Items]
Percent of Total Investments	4.80%	[1]
C000166149 [Member] \| U S Treasury Inflation Indexed Notes 1 63 10 15 27 [Member]
Holdings [Line Items]
Percent of Total Investments	4.80%	[1]
C000166149 [Member] \| One To 2 Years [Member]
Holdings [Line Items]
Percent of Total Investments	23%	[1]
C000166149 [Member] \| Two To 3 Years [Member]
Holdings [Line Items]
Percent of Total Investments	23.60%	[1]
C000166149 [Member] \| Three To 4 Years [Member]
Holdings [Line Items]
Percent of Total Investments	27%	[1]
C000166149 [Member] \| Four To 5 Years [Member]
Holdings [Line Items]
Percent of Total Investments	26.40%	[1]
C000166148 [Member] \| U S Treasury Inflation Indexed Notes 2 38 10 15 28 [Member]
Holdings [Line Items]
Percent of Total Investments	5.60%	[2]
C000166148 [Member] \| U S Treasury Inflation Indexed Notes 2 13 04 15 29 [Member]
Holdings [Line Items]
Percent of Total Investments	5%	[2]
C000166148 [Member] \| U S Treasury Inflation Indexed Notes 0 38 07 15 25 [Member]
Holdings [Line Items]
Percent of Total Investments	4.90%	[2]
C000166148 [Member] \| U S Treasury Inflation Indexed Notes 1 25 04 15 28 [Member]
Holdings [Line Items]
Percent of Total Investments	4.80%	[2]
C000166148 [Member] \| U S Treasury Inflation Indexed Notes 1 63 10 15 27 [Member]
Holdings [Line Items]
Percent of Total Investments	4.80%	[2]
C000166148 [Member] \| One To 2 Years [Member]
Holdings [Line Items]
Percent of Total Investments	23%	[2]
C000166148 [Member] \| Two To 3 Years [Member]
Holdings [Line Items]
Percent of Total Investments	23.60%	[2]
C000166148 [Member] \| Three To 4 Years [Member]
Holdings [Line Items]
Percent of Total Investments	27%	[2]
C000166148 [Member] \| Four To 5 Years [Member]
Holdings [Line Items]
Percent of Total Investments	26.40%	[2]
C000166150 [Member] \| U S Treasury Inflation Indexed Notes 2 38 10 15 28 [Member]
Holdings [Line Items]
Percent of Total Investments	5.60%	[3]
C000166150 [Member] \| U S Treasury Inflation Indexed Notes 2 13 04 15 29 [Member]
Holdings [Line Items]
Percent of Total Investments	5%	[3]
C000166150 [Member] \| U S Treasury Inflation Indexed Notes 0 38 07 15 25 [Member]
Holdings [Line Items]
Percent of Total Investments	4.90%	[3]
C000166150 [Member] \| U S Treasury Inflation Indexed Notes 1 25 04 15 28 [Member]
Holdings [Line Items]
Percent of Total Investments	4.80%	[3]
C000166150 [Member] \| U S Treasury Inflation Indexed Notes 1 63 10 15 27 [Member]
Holdings [Line Items]
Percent of Total Investments	4.80%	[3]
C000166150 [Member] \| One To 2 Years [Member]
Holdings [Line Items]
Percent of Total Investments	23%	[3]
C000166150 [Member] \| Two To 3 Years [Member]
Holdings [Line Items]
Percent of Total Investments	23.60%	[3]
C000166150 [Member] \| Three To 4 Years [Member]
Holdings [Line Items]
Percent of Total Investments	27%	[3]
C000166150 [Member] \| Four To 5 Years [Member]
Holdings [Line Items]
Percent of Total Investments	26.40%	[3]
C000195948 [Member] \| N R [Member]
Holdings [Line Items]
Percent of Total Investments	0.80%	[4],[5]
C000195948 [Member] \| Transportation Sector [Member]
Holdings [Line Items]
Percent of Total Investments	29.50%	[4],[6]
C000195948 [Member] \| Utilities Sector [Member]
Holdings [Line Items]
Percent of Total Investments	12.30%	[4],[6]
C000195948 [Member] \| State [Member]
Holdings [Line Items]
Percent of Total Investments	26.10%	[4],[6]
C000195948 [Member] \| County City Special District School District [Member]
Holdings [Line Items]
Percent of Total Investments	17.80%	[4],[6]
C000195948 [Member] \| Education [Member]
Holdings [Line Items]
Percent of Total Investments	6.60%	[4],[6]
C000195948 [Member] \| Housing [Member]
Holdings [Line Items]
Percent of Total Investments	0.90%	[4],[6]
C000195948 [Member] \| Health [Member]
Holdings [Line Items]
Percent of Total Investments	6.80%	[4],[6]
C000195947 [Member] \| N R [Member]
Holdings [Line Items]
Percent of Total Investments	0.80%	[7],[8]
C000195947 [Member] \| Transportation Sector [Member]
Holdings [Line Items]
Percent of Total Investments	29.50%	[7],[9]
C000195947 [Member] \| Utilities Sector [Member]
Holdings [Line Items]
Percent of Total Investments	12.30%	[7],[9]
C000195947 [Member] \| State [Member]
Holdings [Line Items]
Percent of Total Investments	26.10%	[7],[9]
C000195947 [Member] \| County City Special District School District [Member]
Holdings [Line Items]
Percent of Total Investments	17.80%	[7],[9]
C000195947 [Member] \| Education [Member]
Holdings [Line Items]
Percent of Total Investments	6.60%	[7],[9]
C000195947 [Member] \| Housing [Member]
Holdings [Line Items]
Percent of Total Investments	0.90%	[7],[9]
C000195947 [Member] \| Health [Member]
Holdings [Line Items]
Percent of Total Investments	6.80%	[7],[9]
C000201952 [Member] \| N R [Member]
Holdings [Line Items]
Percent of Total Investments	0.80%	[10],[11]
C000201952 [Member] \| Transportation Sector [Member]
Holdings [Line Items]
Percent of Total Investments	29.50%	[10],[12]
C000201952 [Member] \| Utilities Sector [Member]
Holdings [Line Items]
Percent of Total Investments	12.30%	[10],[12]
C000201952 [Member] \| State [Member]
Holdings [Line Items]
Percent of Total Investments	26.10%	[10],[12]
C000201952 [Member] \| County City Special District School District [Member]
Holdings [Line Items]
Percent of Total Investments	17.80%	[10],[12]
C000201952 [Member] \| Education [Member]
Holdings [Line Items]
Percent of Total Investments	6.60%	[10],[12]
C000201952 [Member] \| Housing [Member]
Holdings [Line Items]
Percent of Total Investments	0.90%	[10],[12]
C000201952 [Member] \| Health [Member]
Holdings [Line Items]
Percent of Total Investments	6.80%	[10],[12]
C000195949 [Member] \| N R [Member]
Holdings [Line Items]
Percent of Total Investments	0.80%	[13],[14]
C000195949 [Member] \| Transportation Sector [Member]
Holdings [Line Items]
Percent of Total Investments	29.50%	[13],[15]
C000195949 [Member] \| Utilities Sector [Member]
Holdings [Line Items]
Percent of Total Investments	12.30%	[13],[15]
C000195949 [Member] \| State [Member]
Holdings [Line Items]
Percent of Total Investments	26.10%	[13],[15]
C000195949 [Member] \| County City Special District School District [Member]
Holdings [Line Items]
Percent of Total Investments	17.80%	[13],[15]
C000195949 [Member] \| Education [Member]
Holdings [Line Items]
Percent of Total Investments	6.60%	[13],[15]
C000195949 [Member] \| Housing [Member]
Holdings [Line Items]
Percent of Total Investments	0.90%	[13],[15]
C000195949 [Member] \| Health [Member]
Holdings [Line Items]
Percent of Total Investments	6.80%	[13],[15]

[1]Excludes short-term securities.[2]Excludes short-term securities.[3]Excludes short-term securities.[4]Excludes short-term securities.[5]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[6]For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes.[7]Excludes short-term securities.[8]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[9]For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes.[10]Excludes short-term securities.[11]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[12]For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes.[13]Excludes short-term securities.[14]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[15]For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes.

Uncategorized Items - d801256dn

Label	Element	Value
C000195948 [Member] \| Standard & Poor's, AAA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	21.80%	[1],[2]
C000195948 [Member] \| Standard & Poor's, A Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	17.60%	[1],[2]
C000195948 [Member] \| Standard & Poor's, BBB Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	0.50%	[1],[2]
C000195948 [Member] \| Standard & Poor's, AA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	59.30%	[1],[2]
C000195949 [Member] \| Standard & Poor's, AAA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	21.80%	[3],[4]
C000195949 [Member] \| Standard & Poor's, A Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	17.60%	[3],[4]
C000195949 [Member] \| Standard & Poor's, BBB Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	0.50%	[3],[4]
C000195949 [Member] \| Standard & Poor's, AA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	59.30%	[3],[4]
C000195947 [Member] \| Standard & Poor's, AAA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	21.80%	[5],[6]
C000195947 [Member] \| Standard & Poor's, A Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	17.60%	[5],[6]
C000195947 [Member] \| Standard & Poor's, BBB Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	0.50%	[5],[6]
C000195947 [Member] \| Standard & Poor's, AA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	59.30%	[5],[6]
C000201952 [Member] \| Standard & Poor's, AAA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	21.80%	[7],[8]
C000201952 [Member] \| Standard & Poor's, A Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	17.60%	[7],[8]
C000201952 [Member] \| Standard & Poor's, BBB Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	0.50%	[7],[8]
C000201952 [Member] \| Standard & Poor's, AA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	59.30%	[7],[8]

[1]Excludes short-term securities.[2]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[3]Excludes short-term securities.[4]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[5]Excludes short-term securities.[6]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[7]Excludes short-term securities.[8]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.