This semi-annual shareholder report contains important information about Blue Chip Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

<span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: justify;">prospectus@principalfunds.com</span>

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Class A	$47	0.93%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 47

Expense Ratio, Percent

0.93%

AssetsNet

$ 11,302,030,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

19.10%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$11,302,030
Total Number of Portfolio Holdings43
Portfolio Turnover Rate (annualized)19.1%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	99.93%
Investment Companies	0.05%
Other Assets and Liabilities	0.02%
Total Net Assets	100.00%

C000131724

Shareholder Report [Line Items]

Fund Name

Blue Chip Fund

Class Name

Class C

Trading Symbol

PBLCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Blue Chip Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Class C	$85	1.67%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 85

Expense Ratio, Percent

1.67%

AssetsNet

$ 11,302,030,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

19.10%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$11,302,030
Total Number of Portfolio Holdings43
Portfolio Turnover Rate (annualized)19.1%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	99.93%
Investment Companies	0.05%
Other Assets and Liabilities	0.02%
Total Net Assets	100.00%

C000193661

Shareholder Report [Line Items]

Fund Name

Blue Chip Fund

Class Name

Class J

Trading Symbol

PBCJX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Blue Chip Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Class J	$38	0.75%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 38

Expense Ratio, Percent

0.75%

AssetsNet

$ 11,302,030,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

19.10%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$11,302,030
Total Number of Portfolio Holdings43
Portfolio Turnover Rate (annualized)19.1%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	99.93%
Investment Companies	0.05%
Other Assets and Liabilities	0.02%
Total Net Assets	100.00%

C000115413

Shareholder Report [Line Items]

Fund Name

Blue Chip Fund

Class Name

Institutional

Trading Symbol

PBCKX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Blue Chip Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Institutional	$34	0.66%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 34

Expense Ratio, Percent

0.66%

AssetsNet

$ 11,302,030,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

19.10%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$11,302,030
Total Number of Portfolio Holdings43
Portfolio Turnover Rate (annualized)19.1%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	99.93%
Investment Companies	0.05%
Other Assets and Liabilities	0.02%
Total Net Assets	100.00%

C000167694

Shareholder Report [Line Items]

Fund Name

Blue Chip Fund

Class Name

R-3

Trading Symbol

PGBEX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Blue Chip Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
R-3	$58	1.13%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 58

Expense Ratio, Percent

1.13%

AssetsNet

$ 11,302,030,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

19.10%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$11,302,030
Total Number of Portfolio Holdings43
Portfolio Turnover Rate (annualized)19.1%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	99.93%
Investment Companies	0.05%
Other Assets and Liabilities	0.02%
Total Net Assets	100.00%

C000167696

Shareholder Report [Line Items]

Fund Name

Blue Chip Fund

Class Name

R-5

Trading Symbol

PGBGX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Blue Chip Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
R-5	$42	0.82%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 42

Expense Ratio, Percent

0.82%

AssetsNet

$ 11,302,030,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

19.10%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$11,302,030
Total Number of Portfolio Holdings43
Portfolio Turnover Rate (annualized)19.1%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	99.93%
Investment Companies	0.05%
Other Assets and Liabilities	0.02%
Total Net Assets	100.00%

C000176331

Shareholder Report [Line Items]

Fund Name

Blue Chip Fund

Class Name

R-6

Trading Symbol

PGBHX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Blue Chip Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
R-6	$29	0.57%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 29

Expense Ratio, Percent

0.57%

AssetsNet

$ 11,302,030,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

19.10%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$11,302,030
Total Number of Portfolio Holdings43
Portfolio Turnover Rate (annualized)19.1%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	99.93%
Investment Companies	0.05%
Other Assets and Liabilities	0.02%
Total Net Assets	100.00%

C000085837

Shareholder Report [Line Items]

Fund Name

Bond Market Index Fund

Class Name

Class J

Trading Symbol

PBIJX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Bond Market Index Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Class J	$23	0.47%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 23

Expense Ratio, Percent

0.47%

AssetsNet

$ 2,533,594,000

Holdings Count | Holding

3,625

InvestmentCompanyPortfolioTurnover

43.30%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$2,533,594
Total Number of Portfolio Holdings3,625
Portfolio Turnover Rate (annualized)43.3%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
U.S. Government & Government Agency Obligations	70.52%
Bonds	27.37%
Investment Companies	4.50%
Municipal Bonds	0.12%
Other Assets and Liabilities	(2.51)%
Total Net Assets	100.00%

C000082026

Shareholder Report [Line Items]

Fund Name

Bond Market Index Fund

Class Name

Institutional

Trading Symbol

PNIIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Bond Market Index Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Institutional	$6	0.13%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 6

Expense Ratio, Percent

0.13%

AssetsNet

$ 2,533,594,000

Holdings Count | Holding

3,625

InvestmentCompanyPortfolioTurnover

43.30%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$2,533,594
Total Number of Portfolio Holdings3,625
Portfolio Turnover Rate (annualized)43.3%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
U.S. Government & Government Agency Obligations	70.52%
Bonds	27.37%
Investment Companies	4.50%
Municipal Bonds	0.12%
Other Assets and Liabilities	(2.51)%
Total Net Assets	100.00%

C000082029

Shareholder Report [Line Items]

Fund Name

Bond Market Index Fund

Class Name

R-3

Trading Symbol

PBOIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Bond Market Index Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
R-3	$35	0.70%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 35

Expense Ratio, Percent

0.70%

AssetsNet

$ 2,533,594,000

Holdings Count | Holding

3,625

InvestmentCompanyPortfolioTurnover

43.30%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$2,533,594
Total Number of Portfolio Holdings3,625
Portfolio Turnover Rate (annualized)43.3%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
U.S. Government & Government Agency Obligations	70.52%
Bonds	27.37%
Investment Companies	4.50%
Municipal Bonds	0.12%
Other Assets and Liabilities	(2.51)%
Total Net Assets	100.00%

C000082031

Shareholder Report [Line Items]

Fund Name

Bond Market Index Fund

Class Name

R-5

Trading Symbol

PBIQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Bond Market Index Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
R-5	$19	0.39%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 19

Expense Ratio, Percent

0.39%

AssetsNet

$ 2,533,594,000

Holdings Count | Holding

3,625

InvestmentCompanyPortfolioTurnover

43.30%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$2,533,594
Total Number of Portfolio Holdings3,625
Portfolio Turnover Rate (annualized)43.3%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
U.S. Government & Government Agency Obligations	70.52%
Bonds	27.37%
Investment Companies	4.50%
Municipal Bonds	0.12%
Other Assets and Liabilities	(2.51)%
Total Net Assets	100.00%

C000129138

Shareholder Report [Line Items]

Fund Name

Capital Securities Fund

Class Name

Class S

Trading Symbol

PCSFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Capital Securities Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Class S	$0	0.00%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 0

Expense Ratio, Percent

0.00%

AssetsNet

$ 1,181,924,000

Holdings Count | Holding

185

InvestmentCompanyPortfolioTurnover

16.50%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$1,181,924
Total Number of Portfolio Holdings185
Portfolio Turnover Rate (annualized)16.5%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Bonds	97.46%
Investment Companies	4.07%
Preferred Stocks	0.88%
Other Assets and Liabilities	(2.41)%
Total Net Assets	100.00%

C000085834

Shareholder Report [Line Items]

Fund Name

Diversified Real Asset Fund

Class Name

Class A

Trading Symbol

PRDAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Diversified Real Asset Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Class A	$60	1.21%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 60

Expense Ratio, Percent

1.21%

AssetsNet

$ 2,442,278,000

Holdings Count | Holding

929

InvestmentCompanyPortfolioTurnover

80.10%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$2,442,278
Total Number of Portfolio Holdings929
Portfolio Turnover Rate (annualized)80.1%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	62.03%
U.S. Government & Government Agency Obligations	22.67%
Investment Companies	13.64%
Senior Floating Rate Interests	3.93%
Bonds	0.70%
Preferred Stocks	0.15%
Purchased Interest Rate Swaptions	0.00%
Purchased Options	0.00%
Other Assets and Liabilities^{Footnote Reference*}	(3.12)%
Total Net Assets	100.00%

Footnote	Description
Footnote^*	Includes derivatives

C000085836

Shareholder Report [Line Items]

Fund Name

Diversified Real Asset Fund

Class Name

Institutional

Trading Symbol

PDRDX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Diversified Real Asset Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Institutional	$42	0.84%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 42

Expense Ratio, Percent

0.84%

AssetsNet

$ 2,442,278,000

Holdings Count | Holding

929

InvestmentCompanyPortfolioTurnover

80.10%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$2,442,278
Total Number of Portfolio Holdings929
Portfolio Turnover Rate (annualized)80.1%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	62.03%
U.S. Government & Government Agency Obligations	22.67%
Investment Companies	13.64%
Senior Floating Rate Interests	3.93%
Bonds	0.70%
Preferred Stocks	0.15%
Purchased Interest Rate Swaptions	0.00%
Purchased Options	0.00%
Other Assets and Liabilities^{Footnote Reference*}	(3.12)%
Total Net Assets	100.00%

Footnote	Description
Footnote^*	Includes derivatives

C000167692

Shareholder Report [Line Items]

Fund Name

Diversified Real Asset Fund

Class Name

R-3

Trading Symbol

PGDRX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Diversified Real Asset Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
R-3	$67	1.35%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 67

Expense Ratio, Percent

1.35%

AssetsNet

$ 2,442,278,000

Holdings Count | Holding

929

InvestmentCompanyPortfolioTurnover

80.10%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$2,442,278
Total Number of Portfolio Holdings929
Portfolio Turnover Rate (annualized)80.1%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	62.03%
U.S. Government & Government Agency Obligations	22.67%
Investment Companies	13.64%
Senior Floating Rate Interests	3.93%
Bonds	0.70%
Preferred Stocks	0.15%
Purchased Interest Rate Swaptions	0.00%
Purchased Options	0.00%
Other Assets and Liabilities^{Footnote Reference*}	(3.12)%
Total Net Assets	100.00%

Footnote	Description
Footnote^*	Includes derivatives

C000150253

Shareholder Report [Line Items]

Fund Name

Diversified Real Asset Fund

Class Name

R-6

Trading Symbol

PDARX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Diversified Real Asset Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
R-6	$39	0.79%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 39

Expense Ratio, Percent

0.79%

AssetsNet

$ 2,442,278,000

Holdings Count | Holding

929

InvestmentCompanyPortfolioTurnover

80.10%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$2,442,278
Total Number of Portfolio Holdings929
Portfolio Turnover Rate (annualized)80.1%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	62.03%
U.S. Government & Government Agency Obligations	22.67%
Investment Companies	13.64%
Senior Floating Rate Interests	3.93%
Bonds	0.70%
Preferred Stocks	0.15%
Purchased Interest Rate Swaptions	0.00%
Purchased Options	0.00%
Other Assets and Liabilities^{Footnote Reference*}	(3.12)%
Total Net Assets	100.00%

Footnote	Description
Footnote^*	Includes derivatives

C000208088

Shareholder Report [Line Items]

Fund Name

Edge MidCap Fund

Class Name

Class A

Trading Symbol

PEMCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Edge MidCap Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Class A	$55	1.10%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 55

Expense Ratio, Percent

1.10%

AssetsNet

$ 70,110,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$70,110
Total Number of Portfolio Holdings48
Portfolio Turnover Rate (annualized)29.0%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	98.07%
Investment Companies	1.76%
Other Assets and Liabilities	0.17%
Total Net Assets	100.00%

C000156764

Shareholder Report [Line Items]

Fund Name

Edge MidCap Fund

Class Name

Institutional

Trading Symbol

PEDGX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Edge MidCap Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Institutional	$38	0.77%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 38

Expense Ratio, Percent

0.77%

AssetsNet

$ 70,110,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$70,110
Total Number of Portfolio Holdings48
Portfolio Turnover Rate (annualized)29.0%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	98.07%
Investment Companies	1.76%
Other Assets and Liabilities	0.17%
Total Net Assets	100.00%

C000176334

Shareholder Report [Line Items]

Fund Name

Edge MidCap Fund

Class Name

R-6

Trading Symbol

PEDMX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Edge MidCap Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
R-6	$33	0.67%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 33

Expense Ratio, Percent

0.67%

AssetsNet

$ 70,110,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$70,110
Total Number of Portfolio Holdings48
Portfolio Turnover Rate (annualized)29.0%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	98.07%
Investment Companies	1.76%
Other Assets and Liabilities	0.17%
Total Net Assets	100.00%

C000104712

Shareholder Report [Line Items]

Fund Name

Global Multi-Strategy Fund

Class Name

Class A

Trading Symbol

PMSAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Global Multi-Strategy Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Class A	$93	1.85%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 93

Expense Ratio, Percent

1.85%

AssetsNet

$ 427,816,000

Holdings Count | Holding

1,779

InvestmentCompanyPortfolioTurnover

131.90%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$427,816
Total Number of Portfolio Holdings1,779
Portfolio Turnover Rate (annualized)131.9%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	35.27%
Bonds	34.40%
Investment Companies	22.81%
U.S. Government & Government Agency Obligations	2.72%
Convertible Bonds	0.41%
Senior Floating Rate Interests	0.20%
Purchased Options	0.07%
Convertible Preferred Stocks	0.06%
Other Assets and Liabilities^{Footnote Reference*}^{Footnote Reference†}	4.06%
Total Net Assets	100.00%

Footnote	Description
Footnote^*	Includes derivatives
Footnote^†	Includes short sales

C000104714

Shareholder Report [Line Items]

Fund Name

Global Multi-Strategy Fund

Class Name

Institutional

Trading Symbol

PSMIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Global Multi-Strategy Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Institutional	$73	1.45%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 73

Expense Ratio, Percent

1.45%

AssetsNet

$ 427,816,000

Holdings Count | Holding

1,779

InvestmentCompanyPortfolioTurnover

131.90%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$427,816
Total Number of Portfolio Holdings1,779
Portfolio Turnover Rate (annualized)131.9%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	35.27%
Bonds	34.40%
Investment Companies	22.81%
U.S. Government & Government Agency Obligations	2.72%
Convertible Bonds	0.41%
Senior Floating Rate Interests	0.20%
Purchased Options	0.07%
Convertible Preferred Stocks	0.06%
Other Assets and Liabilities^{Footnote Reference*}^{Footnote Reference†}	4.06%
Total Net Assets	100.00%

Footnote	Description
Footnote^*	Includes derivatives
Footnote^†	Includes short sales

C000190071

Shareholder Report [Line Items]

Fund Name

Global Multi-Strategy Fund

Class Name

R-6

Trading Symbol

PGLSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Global Multi-Strategy Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
R-6	$69	1.37%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 69

Expense Ratio, Percent

1.37%

AssetsNet

$ 427,816,000

Holdings Count | Holding

1,779

InvestmentCompanyPortfolioTurnover

131.90%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$427,816
Total Number of Portfolio Holdings1,779
Portfolio Turnover Rate (annualized)131.9%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	35.27%
Bonds	34.40%
Investment Companies	22.81%
U.S. Government & Government Agency Obligations	2.72%
Convertible Bonds	0.41%
Senior Floating Rate Interests	0.20%
Purchased Options	0.07%
Convertible Preferred Stocks	0.06%
Other Assets and Liabilities^{Footnote Reference*}^{Footnote Reference†}	4.06%
Total Net Assets	100.00%

Footnote	Description
Footnote^*	Includes derivatives
Footnote^†	Includes short sales

C000237990

Shareholder Report [Line Items]

Fund Name

Global Sustainable Listed Infrastructure Fund

Class Name

Institutional

Trading Symbol

PGSLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Global Sustainable Listed Infrastructure Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Institutional	$43	0.88%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 43

Expense Ratio, Percent

0.88%

AssetsNet

$ 19,395,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

45.20%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$19,395
Total Number of Portfolio Holdings35
Portfolio Turnover Rate (annualized)45.2%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	97.28%
Investment Companies	2.68%
Other Assets and Liabilities	0.04%
Total Net Assets	100.00%

C000082035

Shareholder Report [Line Items]

Fund Name

International Equity Index Fund

Class Name

Institutional

Trading Symbol

PIDIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about International Equity Index Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Institutional	$15	0.31%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 15

Expense Ratio, Percent

0.31%

AssetsNet

$ 1,105,319,000

Holdings Count | Holding

697

InvestmentCompanyPortfolioTurnover

25.90%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$1,105,319
Total Number of Portfolio Holdings697
Portfolio Turnover Rate (annualized)25.9%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	96.25%
Investment Companies	3.37%
Preferred Stocks	0.34%
Other Assets and Liabilities^{Footnote Reference*}	0.04%
Total Net Assets	100.00%

Footnote	Description
Footnote^*	Includes derivatives

C000082032

Shareholder Report [Line Items]

Fund Name

International Equity Index Fund

Class Name

R-3

Trading Symbol

PIIOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about International Equity Index Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
R-3	$44	0.88%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 44

Expense Ratio, Percent

0.88%

AssetsNet

$ 1,105,319,000

Holdings Count | Holding

697

InvestmentCompanyPortfolioTurnover

25.90%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$1,105,319
Total Number of Portfolio Holdings697
Portfolio Turnover Rate (annualized)25.9%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	96.25%
Investment Companies	3.37%
Preferred Stocks	0.34%
Other Assets and Liabilities^{Footnote Reference*}	0.04%
Total Net Assets	100.00%

Footnote	Description
Footnote^*	Includes derivatives

C000082034

Shareholder Report [Line Items]

Fund Name

International Equity Index Fund

Class Name

R-5

Trading Symbol

PIIQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about International Equity Index Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
R-5	$28	0.57%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 28

Expense Ratio, Percent

0.57%

AssetsNet

$ 1,105,319,000

Holdings Count | Holding

697

InvestmentCompanyPortfolioTurnover

25.90%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$1,105,319
Total Number of Portfolio Holdings697
Portfolio Turnover Rate (annualized)25.9%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	96.25%
Investment Companies	3.37%
Preferred Stocks	0.34%
Other Assets and Liabilities^{Footnote Reference*}	0.04%
Total Net Assets	100.00%

Footnote	Description
Footnote^*	Includes derivatives

C000176329

Shareholder Report [Line Items]

Fund Name

International Equity Index Fund

Class Name

R-6

Trading Symbol

PFIEX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about International Equity Index Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
R-6	$14	0.29%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 14

Expense Ratio, Percent

0.29%

AssetsNet

$ 1,105,319,000

Holdings Count | Holding

697

InvestmentCompanyPortfolioTurnover

25.90%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$1,105,319
Total Number of Portfolio Holdings697
Portfolio Turnover Rate (annualized)25.9%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	96.25%
Investment Companies	3.37%
Preferred Stocks	0.34%
Other Assets and Liabilities^{Footnote Reference*}	0.04%
Total Net Assets	100.00%

Footnote	Description
Footnote^*	Includes derivatives

C000150254

Shareholder Report [Line Items]

Fund Name

International Small Company Fund

Class Name

Institutional

Trading Symbol

PISMX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about International Small Company Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Institutional	$53	1.08%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 53

Expense Ratio, Percent

1.08%

AssetsNet

$ 432,757,000

Holdings Count | Holding

134

InvestmentCompanyPortfolioTurnover

38.40%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$432,757
Total Number of Portfolio Holdings134
Portfolio Turnover Rate (annualized)38.4%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	99.29%
Investment Companies	1.05%
Other Assets and Liabilities	(0.34)%
Total Net Assets	100.00%

C000176332

Shareholder Report [Line Items]

Fund Name

International Small Company Fund

Class Name

R-6

Trading Symbol

PFISX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about International Small Company Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
R-6	$50	1.03%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 50

Expense Ratio, Percent

1.03%

AssetsNet

$ 432,757,000

Holdings Count | Holding

134

InvestmentCompanyPortfolioTurnover

38.40%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$432,757
Total Number of Portfolio Holdings134
Portfolio Turnover Rate (annualized)38.4%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	99.29%
Investment Companies	1.05%
Other Assets and Liabilities	(0.34)%
Total Net Assets	100.00%

C000115414

Shareholder Report [Line Items]

Fund Name

Opportunistic Municipal Fund

Class Name

Class A

Trading Symbol

PMOAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Opportunistic Municipal Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Class A	$53	1.07%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 53

Expense Ratio, Percent

1.07%

AssetsNet

$ 182,529,000

Holdings Count | Holding

147

InvestmentCompanyPortfolioTurnover

71.60%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$182,529
Total Number of Portfolio Holdings147
Portfolio Turnover Rate (annualized)71.6%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Municipal Bonds	109.38%
Investment Companies	0.39%
Other Assets and Liabilities^{Footnote Reference*}	(9.77)%
Total Net Assets	100.00%

Footnote	Description
Footnote^*	Includes inverse floating rate obligations

C000153266

Shareholder Report [Line Items]

Fund Name

Opportunistic Municipal Fund

Class Name

Institutional

Trading Symbol

POMFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Opportunistic Municipal Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Institutional	$40	0.79%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 40

Expense Ratio, Percent

0.79%

AssetsNet

$ 182,529,000

Holdings Count | Holding

147

InvestmentCompanyPortfolioTurnover

71.60%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$182,529
Total Number of Portfolio Holdings147
Portfolio Turnover Rate (annualized)71.6%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Municipal Bonds	109.38%
Investment Companies	0.39%
Other Assets and Liabilities^{Footnote Reference*}	(9.77)%
Total Net Assets	100.00%

Footnote	Description
Footnote^*	Includes inverse floating rate obligations

C000101659

Shareholder Report [Line Items]

Fund Name

Small-MidCap Dividend Income Fund

Class Name

Class A

Trading Symbol

PMDAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Small-MidCap Dividend Income Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Class A	$56	1.12%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 56

Expense Ratio, Percent

1.12%

AssetsNet

$ 1,672,280,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

20.80%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$1,672,280
Total Number of Portfolio Holdings73
Portfolio Turnover Rate (annualized)20.8%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	98.56%
Investment Companies	1.53%
Other Assets and Liabilities	(0.09)%
Total Net Assets	100.00%

C000115416

Shareholder Report [Line Items]

Fund Name

Small-MidCap Dividend Income Fund

Class Name

Class C

Trading Symbol

PMDDX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Small-MidCap Dividend Income Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Class C	$93	1.87%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 93

Expense Ratio, Percent

1.87%

AssetsNet

$ 1,672,280,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

20.80%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$1,672,280
Total Number of Portfolio Holdings73
Portfolio Turnover Rate (annualized)20.8%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	98.56%
Investment Companies	1.53%
Other Assets and Liabilities	(0.09)%
Total Net Assets	100.00%

C000101661

Shareholder Report [Line Items]

Fund Name

Small-MidCap Dividend Income Fund

Class Name

Institutional

Trading Symbol

PMDIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Small-MidCap Dividend Income Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Institutional	$42	0.85%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 42

Expense Ratio, Percent

0.85%

AssetsNet

$ 1,672,280,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

20.80%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$1,672,280
Total Number of Portfolio Holdings73
Portfolio Turnover Rate (annualized)20.8%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	98.56%
Investment Companies	1.53%
Other Assets and Liabilities	(0.09)%
Total Net Assets	100.00%

C000176330

Shareholder Report [Line Items]

Fund Name

Small-MidCap Dividend Income Fund

Class Name

R-6

Trading Symbol

PMDHX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Small-MidCap Dividend Income Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
R-6	$38	0.77%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 38

Expense Ratio, Percent

0.77%

AssetsNet

$ 1,672,280,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

20.80%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$1,672,280
Total Number of Portfolio Holdings73
Portfolio Turnover Rate (annualized)20.8%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Common Stocks	98.56%
Investment Companies	1.53%
Other Assets and Liabilities	(0.09)%
Total Net Assets	100.00%

C000019597

Shareholder Report [Line Items]

Fund Name

Spectrum Preferred and Capital Securities Income Fund

Class Name

Class A

Trading Symbol

PPSAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Spectrum Preferred and Capital Securities Income Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Class A	$53	1.05%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 53

Expense Ratio, Percent

1.05%

AssetsNet

$ 5,940,886,000

Holdings Count | Holding

336

InvestmentCompanyPortfolioTurnover

28.90%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$5,940,886
Total Number of Portfolio Holdings336
Portfolio Turnover Rate (annualized)28.9%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Bonds	89.94%
Preferred Stocks	7.62%
Investment Companies	4.23%
Convertible Preferred Stocks	0.05%
Other Assets and Liabilities	(1.84)%
Total Net Assets	100.00%

C000038790

Shareholder Report [Line Items]

Fund Name

Spectrum Preferred and Capital Securities Income Fund

Class Name

Class C

Trading Symbol

PRFCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Spectrum Preferred and Capital Securities Income Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Class C	$91	1.82%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 91

Expense Ratio, Percent

1.82%

AssetsNet

$ 5,940,886,000

Holdings Count | Holding

336

InvestmentCompanyPortfolioTurnover

28.90%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$5,940,886
Total Number of Portfolio Holdings336
Portfolio Turnover Rate (annualized)28.9%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Bonds	89.94%
Preferred Stocks	7.62%
Investment Companies	4.23%
Convertible Preferred Stocks	0.05%
Other Assets and Liabilities	(1.84)%
Total Net Assets	100.00%

C000019596

Shareholder Report [Line Items]

Fund Name

Spectrum Preferred and Capital Securities Income Fund

Class Name

Class J

Trading Symbol

PPSJX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Spectrum Preferred and Capital Securities Income Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Class J	$50	1.00%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 50

Expense Ratio, Percent

1.00%

AssetsNet

$ 5,940,886,000

Holdings Count | Holding

336

InvestmentCompanyPortfolioTurnover

28.90%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$5,940,886
Total Number of Portfolio Holdings336
Portfolio Turnover Rate (annualized)28.9%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Bonds	89.94%
Preferred Stocks	7.62%
Investment Companies	4.23%
Convertible Preferred Stocks	0.05%
Other Assets and Liabilities	(1.84)%
Total Net Assets	100.00%

C000019595

Shareholder Report [Line Items]

Fund Name

Spectrum Preferred and Capital Securities Income Fund

Class Name

Institutional

Trading Symbol

PPSIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Spectrum Preferred and Capital Securities Income Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
Institutional	$40	0.80%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 40

Expense Ratio, Percent

0.80%

AssetsNet

$ 5,940,886,000

Holdings Count | Holding

336

InvestmentCompanyPortfolioTurnover

28.90%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$5,940,886
Total Number of Portfolio Holdings336
Portfolio Turnover Rate (annualized)28.9%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Bonds	89.94%
Preferred Stocks	7.62%
Investment Companies	4.23%
Convertible Preferred Stocks	0.05%
Other Assets and Liabilities	(1.84)%
Total Net Assets	100.00%

C000019591

Shareholder Report [Line Items]

Fund Name

Spectrum Preferred and Capital Securities Income Fund

Class Name

R-3

Trading Symbol

PNARX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Spectrum Preferred and Capital Securities Income Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
R-3	$64	1.27%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 64

Expense Ratio, Percent

1.27%

AssetsNet

$ 5,940,886,000

Holdings Count | Holding

336

InvestmentCompanyPortfolioTurnover

28.90%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$5,940,886
Total Number of Portfolio Holdings336
Portfolio Turnover Rate (annualized)28.9%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Bonds	89.94%
Preferred Stocks	7.62%
Investment Companies	4.23%
Convertible Preferred Stocks	0.05%
Other Assets and Liabilities	(1.84)%
Total Net Assets	100.00%

C000019592

Shareholder Report [Line Items]

Fund Name

Spectrum Preferred and Capital Securities Income Fund

Class Name

R-5

Trading Symbol

PPARX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Spectrum Preferred and Capital Securities Income Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

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 investment	Costs paid as a percentage of a $10,000 investment
R-5	$48	0.96%^{Footnote Reference*}

Footnote	Description
Footnote^*	Computed on an annualized basis.

Expenses Paid, Amount

$ 48

Expense Ratio, Percent

0.96%

AssetsNet

$ 5,940,886,000

Holdings Count | Holding

336

InvestmentCompanyPortfolioTurnover

28.90%

Additional Fund Statistics [Text Block]

Fund Statistics

Net Assets (amount in thousands)$5,940,886
Total Number of Portfolio Holdings336
Portfolio Turnover Rate (annualized)28.9%

Holdings [Text Block]

Portfolio Allocation

Asset Weighting	Percent of Net Assets
Bonds	89.94%
Preferred Stocks	7.62%
Investment Companies	4.23%
Convertible Preferred Stocks	0.05%
Other Assets and Liabilities	(1.84)%
Total Net Assets	100.00%

C000176328

Shareholder Report [Line Items]

Fund Name

Spectrum Preferred and Capital Securities Income Fund

Class Name

R-6

Trading Symbol

PPREX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Spectrum Preferred and Capital Securities Income Fund (the "Fund") for the period of September 1, 2024 to February 28, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.PrincipalAM.com/prospectuses or you can request information by contacting us at 1-800-222-5852 or emailing prospectus@principalfunds.com.

Additional Information Phone Number

1-800-222-5852

Additional Information Email

Additional Information Website

Expenses [Text Block]