Label	Element	Value
Risk Return Abstract	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	PRINCIPAL FUNDS, INC.
Prospectus Date	rr_ProspectusDate	Dec. 31, 2022
Blue Chip Fund
Risk Return Abstract	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	<span style="color:#000000;font-family:Arial;font-size:12pt;font-weight:bold;text-transform:uppercase;">Blue Chip Fund</span>
Objective [Heading]	rr_ObjectiveHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Objective</span>
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Fund seeks long-term growth of capital.
Expense [Heading]	rr_ExpenseHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Fees and Expenses of the Fund</span>
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 117 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 4 of the Fund’s Statement of Additional Information.If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
Shareholder Fees Caption [Text]	rr_ShareholderFeesCaption	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Shareholder Fees (fees paid directly from your investment)</span>
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Annual Fund Operating Expenses</span> <br/><span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0%;">(expenses that you pay each year as a percentage of the value of your investment)</span>
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	<span style="font-family:Arial;font-size:8pt;">December 30, </span><span style="font-family:Arial;font-size:8pt;">2023</span>
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Portfolio Turnover</span>
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 24.0% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	24.00%
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	<span style="font-family:Arial;font-size:10pt;">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the </span><span style="font-family:Arial;font-size:10pt;">future, at least $</span><span style="font-family:Arial;font-size:10pt;">50,000</span><span style="font-family:Arial;font-size:10pt;"> in Class A shares of Principal Funds, Inc.</span>
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	$ 50,000
Expenses Restated to Reflect Current [Text]	rr_ExpensesRestatedToReflectCurrent	<span style="color:#000000;font-family:Arial;font-size:8pt;">Fees have been restated to reflect current fees.</span>
Expense Example [Heading]	rr_ExpenseExampleHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Example</span>
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example assumes conversion of the Class C shares to Class A shares after the eighth year. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example, No Redemption, By Year, Caption [Text]	rr_ExpenseExampleNoRedemptionByYearCaption	<span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;">With respect to Classes C and J shares, you would pay the following expenses if you did not redeem your </span><span style="color:#000000;font-family:Arial;font-size:10pt;">shares (all other classes would be the same as in the above example):</span>
Strategy [Heading]	rr_StrategyHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Principal Investment Strategies</span>
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Under normal circumstances, the Fund invests at least 80% of its net assets, plus any borrowings for investment purposes, in equity securities of companies with large market capitalizations at the time of purchase that, in the opinion of Principal Global Investors, LLC (“PGI”), the Fund’s investment advisor, display characteristics of a “blue chip” company. For this Fund, companies with large market capitalizations are those with market capitalizations similar to companies in the Russell 1000® Growth Index (as of November 30, 2022, this was between approximately $1.2 billion and $2.4 trillion). In PGI’s view, “blue chip” companies typically display some or all of the following characteristics: (1) large, well-established and financially sound companies; (2) issuers with market capitalizations in the billions; (3) are considered market leaders or among the top three companies in its sector; and (4) commonly considered household names. The Fund tends to focus on securities of companies that show potential for growth of capital as well as an expectation for above-average earnings. In selecting securities in which to invest, PGI uses a bottom-up, fundamental process, focusing on a fundamental analysis of individual companies. The Fund invests in securities of foreign companies. The Fund invested significantly in industries within the financial services and information technology sectors as of November 30, 2022.
Risk [Heading]	rr_RiskHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Principal Risks</span>
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	The value of your investment in the Fund changes with the value of the Fund’s investments. Many factors affect that value, and it is possible to lose money by investing in the Fund. An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The principal risks of investing in the Fund are listed below in alphabetical order and not in order of significance.Equity Securities Risk.  A variety of factors can negatively impact the value of equity securities held by a fund, including a decline in the issuer’s financial condition, unfavorable performance of the issuer’s sector or industry, or changes in response to overall market and economic conditions. A fund’s principal market segment(s) (such as market capitalization or style) may underperform other market segments or the equity markets as a whole.•Growth Style Risk.  Growth investing entails the risk that if growth companies do not increase their earnings at a rate expected by investors, the market price of their stock may decline significantly, even if earnings show an absolute increase. Growth company stocks also typically lack the dividend yield that can lessen price declines in market downturns.Financial Services Sector Risk.  A fund that invests significantly in financial services companies may be more susceptible to adverse economic or regulatory occurrences affecting financial services companies. Financial companies may be adversely affected in certain market cycles, including periods of rising interest rates, which may restrict the availability and increase the cost of capital, and declining economic conditions, which may cause credit losses due to financial difficulties of borrowers. Because many types of financial companies are especially vulnerable to these economic cycles, the Fund’s investments in these companies may lose significant value during such periods.Foreign Currency Risk.  Risks of investing in securities denominated in, or that trade in, foreign (non-U.S.) currencies include changes in foreign exchange rates and foreign exchange restrictions.Foreign Securities Risk.  The risks of foreign securities include loss of value as a result of: political or economic instability; nationalization, expropriation, or confiscatory taxation; settlement delays; and limited government regulation (including less stringent reporting, accounting, and disclosure standards than are required of U.S. companies).Information Technology Sector Risk.  Companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and are particularly vulnerable to changes in technology product cycles, product obsolescence, government regulation, and competition, both domestically and internationally. Such companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability.Redemption and Large Transaction Risk.  Ownership of the Fund’s shares may be concentrated in one or a few large investors (such as funds of funds, institutional investors, and asset allocation programs) that may redeem or purchase shares in large quantities. These transactions may cause the Fund to sell securities to meet redemptions or to invest additional cash at times it would not otherwise do so, which may result in increased transaction costs, increased expenses, changes to expense ratios, and adverse effects to Fund performance. Such transactions may also accelerate the realization of taxable income if sales of portfolio securities result in gains. Moreover, reallocations by large shareholders among share classes of a fund may result in changes to the expense ratios of affected classes, which may increase the expenses paid by shareholders of the class that experienced the redemption.
Risk Lose Money [Text]	rr_RiskLoseMoney	<span style="color:#000000;font-family:Arial;font-size:10pt;">Many factors affect that value, and it is possible to lose money by investing in the Fund.</span>
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	<span style="color:#000000;font-family:Arial;font-size:10pt;"> An investment in the Fund is not a deposit of a bank and is not </span><span style="color:#000000;font-family:Arial;font-size:10pt;">insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</span>
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Performance</span>
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.PrincipalAM.com.Using the historical performance of the Fund's Institutional Class shares, adjusted as described below, the bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.Life of Fund returns are measured from the date the Fund’s shares were first sold (June 14, 2012).For periods prior to the inception date of Classes A and C shares (September 30, 2013), Classes R-3, R-4, and R-5 shares (March 29, 2016), Class R-6 shares (January 3, 2017), and Class J shares (September 11, 2017), the performance shown in the bar chart for Class A shares and the table for Classes A, C, J, R-3, R-4, R-5, and R-6 shares is that of the Fund’s Institutional Class shares, adjusted to reflect the respective fees and expenses of each class. However, where this adjustment for fees and expenses results in performance for a newer class that is higher than the historical performance of the Institutional Class shares, the historical performance of the Institutional Class shares is used. These adjustments for these newer classes result in performance for such periods that is no higher than the historical performance of the Institutional Class shares, which were first sold June 14, 2012.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	<span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0%;">Using the historical performance of the Fund's Institutional Class shares, adjusted as described below, the bar chart shows </span><span style="color:#000000;font-family:Arial;font-size:10pt;">the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). </span><span style="color:#000000;font-family:Arial;font-size:10pt;">These annual returns do not reflect sales charges on Class A shares; if they did, results would be </span><span style="color:#000000;font-family:Arial;font-size:10pt;">lower.</span><span style="color:#000000;font-family:Arial;font-size:10pt;"> The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the </span><span style="color:#000000;font-family:Arial;font-size:10pt;">Fund’s average annual total returns compare with those of one or more broad measures of market performance.</span>
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	<span style="font-family:Arial;font-size:10pt;">www.</span><span style="font-family:Arial;font-size:10pt;">PrincipalAM.com</span>
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	<span style="font-family:Arial;font-size:10pt;">Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.</span>
Bar Chart [Heading]	rr_BarChartHeading	<span style="font-family:Arial;font-size:10pt;font-weight:bold;">Total Returns as of December 31</span>
Bar Chart Does Not Reflect Sales Loads [Text]	rr_BarChartDoesNotReflectSalesLoads	<span style="color:#000000;font-family:Arial;font-size:10pt;">These annual returns do not reflect sales charges on Class A shares; if they did, results would be </span><span style="color:#000000;font-family:Arial;font-size:10pt;">lower.</span>
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Highest return for a quarter during the period of the bar chart above:Q2 202027.66%Lowest return for a quarter during the period of the bar chart above:Q1 2020(13.38)%Year-to-date return for Class A shares:Q3 2022(34.66)%
Performance Table Heading	rr_PerformanceTableHeading	<span style="font-family:Arial;font-size:10pt;font-weight:bold;">Average Annual Total Returns</span> <br/><span style="font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0%;">For the periods ended December 31, </span><span style="font-family:Arial;font-size:10pt;font-weight:bold;">2021</span>
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	<span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0%;">After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect </span><span style="color:#000000;font-family:Arial;font-size:10pt;">the impact of state and local taxes.</span>
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	<span style="color:#000000;font-family:Arial;font-size:10pt;"> Actual after-tax returns depend on an investor’s tax situation and may differ from those </span><span style="color:#000000;font-family:Arial;font-size:10pt;">shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.</span>
Performance Table One Class of after Tax Shown [Text]	rr_PerformanceTableOneClassOfAfterTaxShown	<span style="color:#000000;font-family:Arial;font-size:10pt;"> After-tax returns are shown for Class A shares only </span><span style="color:#000000;font-family:Arial;font-size:10pt;">and would be different for the other share classes.</span>
Performance Table Narrative	rr_PerformanceTableNarrativeTextBlock	After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes.
Blue Chip Fund | Class A
Risk Return Abstract	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	5.50%
Maximum Deferred Sales Charge (Load) (as a percentage of the offering price or NAV when Sales Load is paid, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	1.00%
Management Fees	rr_ManagementFeesOverAssets	0.59%	[1]
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other Expenses	rr_OtherExpensesOverAssets	0.13%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.97%
Fee Waiver and Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.03%)	[2],[3]
Total Annual Fund Operating Expenses after Fee Waiver and Expense Reimbursement	rr_NetExpensesOverAssets	0.94%
1 year	rr_ExpenseExampleYear01	$ 641
3 years	rr_ExpenseExampleYear03	839
5 years	rr_ExpenseExampleYear05	1,054
10 years	rr_ExpenseExampleYear10	$ 1,672
2013	rr_AnnualReturn2013	28.67%
2014	rr_AnnualReturn2014	9.96%
2015	rr_AnnualReturn2015	4.79%
2016	rr_AnnualReturn2016	8.23%
2017	rr_AnnualReturn2017	28.31%
2018	rr_AnnualReturn2018	2.66%
2019	rr_AnnualReturn2019	38.29%
2020	rr_AnnualReturn2020	34.50%
2021	rr_AnnualReturn2021	24.82%
Year to Date Return, Label	rr_YearToDateReturnLabel	<span style="font-family:Arial;font-size:8pt;font-weight:bold;margin-left:0.0pt;">Year-to-date return for Class A shares:</span>
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2022
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	(34.66%)
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	<span style="font-family:Arial;font-size:8pt;font-weight:bold;margin-left:0.0pt;">Highest return for a quarter during the period of the bar chart above:</span>
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2020
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	27.66%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	<span style="font-family:Arial;font-size:8pt;font-weight:bold;margin-left:0.0pt;">Lowest return for a quarter during the period of the bar chart above:</span>
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Mar. 31, 2020
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(13.38%)
1 Year	rr_AverageAnnualReturnYear01	17.95%
5 Years	rr_AverageAnnualReturnYear05	23.64%
Life of Fund	rr_AverageAnnualReturnSinceInception	18.63%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jun. 14, 2012
Blue Chip Fund | Class C
Risk Return Abstract	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of the offering price or NAV when Sales Load is paid, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	1.00%
Management Fees	rr_ManagementFeesOverAssets	0.59%	[1]
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other Expenses	rr_OtherExpensesOverAssets	0.10%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.69%
Fee Waiver and Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.03%)	[2],[3]
Total Annual Fund Operating Expenses after Fee Waiver and Expense Reimbursement	rr_NetExpensesOverAssets	1.66%
1 year	rr_ExpenseExampleYear01	$ 269
3 years	rr_ExpenseExampleYear03	530
5 years	rr_ExpenseExampleYear05	915
10 years	rr_ExpenseExampleYear10	1,804
1 year	rr_ExpenseExampleNoRedemptionYear01	169
3 years	rr_ExpenseExampleNoRedemptionYear03	530
5 years	rr_ExpenseExampleNoRedemptionYear05	915
10 years	rr_ExpenseExampleNoRedemptionYear10	$ 1,804
1 Year	rr_AverageAnnualReturnYear01	22.90%
5 Years	rr_AverageAnnualReturnYear05	24.11%
Life of Fund	rr_AverageAnnualReturnSinceInception	18.46%
Blue Chip Fund | Class J
Risk Return Abstract	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of the offering price or NAV when Sales Load is paid, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	1.00%
Management Fees	rr_ManagementFeesOverAssets	0.59%	[1]
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.15%
Other Expenses	rr_OtherExpensesOverAssets	0.08%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.82%
Fee Waiver and Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.03%)	[2],[3]
Total Annual Fund Operating Expenses after Fee Waiver and Expense Reimbursement	rr_NetExpensesOverAssets	0.79%
1 year	rr_ExpenseExampleYear01	$ 181
3 years	rr_ExpenseExampleYear03	259
5 years	rr_ExpenseExampleYear05	452
10 years	rr_ExpenseExampleYear10	1,011
1 year	rr_ExpenseExampleNoRedemptionYear01	81
3 years	rr_ExpenseExampleNoRedemptionYear03	259
5 years	rr_ExpenseExampleNoRedemptionYear05	452
10 years	rr_ExpenseExampleNoRedemptionYear10	$ 1,011
1 Year	rr_AverageAnnualReturnYear01	23.99%
5 Years	rr_AverageAnnualReturnYear05	25.16%
Life of Fund	rr_AverageAnnualReturnSinceInception	19.54%
Blue Chip Fund | Institutional Class
Risk Return Abstract	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of the offering price or NAV when Sales Load is paid, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	none
Management Fees	rr_ManagementFeesOverAssets	0.59%	[1]
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets
Other Expenses	rr_OtherExpensesOverAssets	0.10%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.69%
Fee Waiver and Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.03%)	[2],[3]
Total Annual Fund Operating Expenses after Fee Waiver and Expense Reimbursement	rr_NetExpensesOverAssets	0.66%
1 year	rr_ExpenseExampleYear01	$ 67
3 years	rr_ExpenseExampleYear03	218
5 years	rr_ExpenseExampleYear05	381
10 years	rr_ExpenseExampleYear10	$ 856
1 Year	rr_AverageAnnualReturnYear01	25.14%
5 Years	rr_AverageAnnualReturnYear05	25.44%
Life of Fund	rr_AverageAnnualReturnSinceInception	19.88%
Blue Chip Fund | Class R-3
Risk Return Abstract	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of the offering price or NAV when Sales Load is paid, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	none
Management Fees	rr_ManagementFeesOverAssets	0.59%	[1]
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other Expenses	rr_OtherExpensesOverAssets	0.32%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.16%
Fee Waiver and Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.03%)	[2],[3]
Total Annual Fund Operating Expenses after Fee Waiver and Expense Reimbursement	rr_NetExpensesOverAssets	1.13%
1 year	rr_ExpenseExampleYear01	$ 115
3 years	rr_ExpenseExampleYear03	366
5 years	rr_ExpenseExampleYear05	635
10 years	rr_ExpenseExampleYear10	$ 1,406
1 Year	rr_AverageAnnualReturnYear01	24.54%
5 Years	rr_AverageAnnualReturnYear05	24.82%
Life of Fund	rr_AverageAnnualReturnSinceInception	19.25%
Blue Chip Fund | Class R-4
Risk Return Abstract	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of the offering price or NAV when Sales Load is paid, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	none
Management Fees	rr_ManagementFeesOverAssets	0.59%	[1]
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.10%
Other Expenses	rr_OtherExpensesOverAssets	0.28%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.97%
Fee Waiver and Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.03%)	[2],[3]
Total Annual Fund Operating Expenses after Fee Waiver and Expense Reimbursement	rr_NetExpensesOverAssets	0.94%
1 year	rr_ExpenseExampleYear01	$ 96
3 years	rr_ExpenseExampleYear03	306
5 years	rr_ExpenseExampleYear05	533
10 years	rr_ExpenseExampleYear10	$ 1,187
1 Year	rr_AverageAnnualReturnYear01	24.79%
5 Years	rr_AverageAnnualReturnYear05	25.06%
Life of Fund	rr_AverageAnnualReturnSinceInception	19.48%
Blue Chip Fund | Class R-5
Risk Return Abstract	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of the offering price or NAV when Sales Load is paid, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	none
Management Fees	rr_ManagementFeesOverAssets	0.59%	[1]
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets
Other Expenses	rr_OtherExpensesOverAssets	0.26%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.85%
Fee Waiver and Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.03%)	[2],[3]
Total Annual Fund Operating Expenses after Fee Waiver and Expense Reimbursement	rr_NetExpensesOverAssets	0.82%
1 year	rr_ExpenseExampleYear01	$ 84
3 years	rr_ExpenseExampleYear03	268
5 years	rr_ExpenseExampleYear05	468
10 years	rr_ExpenseExampleYear10	$ 1,046
1 Year	rr_AverageAnnualReturnYear01	24.95%
5 Years	rr_AverageAnnualReturnYear05	25.22%
Life of Fund	rr_AverageAnnualReturnSinceInception	19.62%
Blue Chip Fund | Class R-6
Risk Return Abstract	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of the offering price or NAV when Sales Load is paid, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	none
Management Fees	rr_ManagementFeesOverAssets	0.59%	[1]
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets
Other Expenses	rr_OtherExpensesOverAssets
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.59%
Fee Waiver and Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.03%)	[2],[3]
Total Annual Fund Operating Expenses after Fee Waiver and Expense Reimbursement	rr_NetExpensesOverAssets	0.56%
1 year	rr_ExpenseExampleYear01	$ 57
3 years	rr_ExpenseExampleYear03	186
5 years	rr_ExpenseExampleYear05	326
10 years	rr_ExpenseExampleYear10	$ 735
1 Year	rr_AverageAnnualReturnYear01	25.28%
5 Years	rr_AverageAnnualReturnYear05	25.54%
Life of Fund	rr_AverageAnnualReturnSinceInception	19.90%
Blue Chip Fund | Return After Taxes on Distributions | Class A
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	16.06%
5 Years	rr_AverageAnnualReturnYear05	22.18%
Life of Fund	rr_AverageAnnualReturnSinceInception	17.69%
Blue Chip Fund | Return After Taxes on Distributions and Sale of Fund Shares | Class A
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	11.81%
5 Years	rr_AverageAnnualReturnYear05	19.07%
Life of Fund	rr_AverageAnnualReturnSinceInception	15.63%
Blue Chip Fund | Russell 1000 Growth Index (reflects no deduction for fees, expenses, or taxes)
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	27.62%
5 Years	rr_AverageAnnualReturnYear05	25.32%
Life of Fund	rr_AverageAnnualReturnSinceInception	19.89%

[1] Fees have been restated to reflect current fees.

[2] Principal Global Investors, LLC (“PGI”), the investment advisor, has contractually agreed to limit the Fund’s expenses by paying, if necessary, expenses normally payable by the Fund (excluding interest expense, expenses related to fund investments, acquired fund fees and expenses, and tax reclaim recovery expenses and other extraordinary expenses) to maintain a total level of operating expenses (expressed as a percent of average net assets on an annualized basis) not to exceed 0.66% for Institutional Class shares. It is expected that the expense limit will continue through the period ending December 30, 2023; however, Principal Funds, Inc. and PGI, the parties to the agreement, may mutually agree to terminate the expense limit prior to the end of the period. Subject to applicable expense limits, the Fund may reimburse PGI for expenses incurred during the current fiscal year.

[3] Principal Global Investors, LLC (“PGI”), the investment advisor, has contractually agreed to waive a portion of the Fund’s management fees through the period ending December 30, 2023. The fee waiver will reduce the Fund's management fees by 0.03% (expressed as a percent of average net assets on an annualized basis). It is expected that the fee waiver will continue through the period disclosed; however, Principal Funds, Inc. and PGI, the parties to the agreement, may mutually agree to terminate the fee waiver prior to the end of the period.