Description of the Plan and Significant Accounting Policies (Policies) - EBP 001	12 Months Ended
Dec. 31, 2025
EBP, Description of Plan [Line Items]
Basis of Presentation	Basis of Presentation The accompanying financial statements have been prepared on the accrual basis of accounting in accordance with accounting principles generally accepted in the United States of America.
Contributions	Contributions Participants may make before-tax or Roth contributions up to 100% of their annual eligible compensation, as limited by the Internal Revenue Service (“IRS”), which is adjusted annually by the Secretary of the Treasury for inflation. Eligible employees who have reached age 50 during the Plan year may elect to make catch-up contributions, as limited by the IRS. The Plan also permits rollover contributions from other qualified retirement plans. Employee contributions to the Plan are made through regular payroll deductions. The Company makes discretionary matching contributions of 100% of elective deferrals up to 6% of annual eligible compensation. Matching contributions are funded each pay period. The Company has the right to designate all or a portion of the matching contributions as qualified. To the extent matching contributions are so designated, they are non-forfeitable and may not be withdrawn from the Plan prior to separation from service or attainment of age 59½. Discretionary matching contributions made by the Company totaled $36 million for the year ended December 31, 2025. Once eligibility requirements are met, employees are automatically enrolled in the Plan, and 6% of each employee’s annual eligible compensation is automatically withheld and contributed to the Plan unless the employee makes another election. The Company may make discretionary or profit-sharing contributions.
Participant Notes Receivable	Participant Notes Receivable Participants may borrow from their accounts a minimum of $1,000 up to a maximum equal to the lesser of $50,000 or 50% of their vested account balances. Participants may have a maximum of one loan outstanding at any given time. The notes receivable are secured by the balances in the participants’ accounts and bear interest at The Wall Street Journal prime rate plus 1.00%, which is commensurate with local prevailing rates as determined quarterly by the Plan administrator at loan origination. Notes receivable have a maximum term of five years . In prior Plan years, the maximum term of the loans was longer for the purchase of a principal residence. Principal and interest are paid ratably through payroll deductions. Participant notes receivable are recorded in the financial statements at amortized cost (which represents unpaid principal plus accrued interest). Upon termination of a participant from employment, the participant’s loan shall continue to be payable in accordance with the provisions of the participant’s loan or be due in full.
Payment of Benefits	Payment of Benefits Upon death, disability, retirement, hardship, or termination of service, a participant may receive a lump sum payment in the amount equal to the participant’s vested account balance within a reasonable period of time. Accounts with balances less than $5,000 may be immediately distributed upon a distribution event. If the participant’s total vested balance is greater than $5,000, the participant may elect not to receive a distribution until required by law to receive required minimum distributions. The Plan allows hardship withdrawals in the event of undue financial hardship. Such withdrawal is limited to the participants’ pre-tax or Roth elective deferral contributions and earnings thereon. Benefits are recorded as distributions to participants when paid.
Administrative Expenses	Administrative Expenses Administrative expenses of the Plan are paid by the Plan or the Plan sponsor, as provided in the Plan document. Participants pay administrative costs for loans, distributions and qualified domestic relation orders. All investment management and transaction fees directly related to the Plan investments are paid by the Plan. Management fees and operating expenses charged to the Plan for investments are deducted from income earned on a daily basis and are not separately reflected. Consequently, investment management fees and operating expenses are reflected as a reduction of investment return for such investments. The Company provides, at no cost to the Plan, certain administrative, accounting, and legal services to the Plan and also pays the cost of certain outside services for the Plan. The Plan has a revenue-sharing agreement whereby a certain investment manager returns a portion of the investment management fees to the recordkeeper to offset the administrative expenses of participants invested with that investment manager.
Excess Participant Contributions Payable	Excess Participant Contributions Payable The Plan is required to return participant contributions received during the Plan year in excess of the IRC limits.
Valuation of Investments and Income Recognition	Valuation of Investments and Income Recognition Investments are recorded at fair value as reported to the Plan by the trustee. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. See Note 2 for discussion of fair value measurements. The net realized and unrealized investment gain or loss (net appreciation or depreciation in fair value of investments) is reflected on the accompanying statement of changes in net assets available for benefits and is determined as the difference between fair value at the beginning of the year (or date purchased if during the year) and selling price (if sold during the year) or year-end fair value. Purchases and sales of investments are recorded on a trade-date basis. Interest income is recognized on the accrual basis. Dividends are recognized on the ex-dividend date.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and changes in net assets available for benefits and disclosures. Accordingly, actual results could differ from those estimates.
Risks, Uncertainties, and Concentrations	Risks, Uncertainties, and Concentrations The Plan provides for various investments that, in general, are exposed to various risks, such as interest rate, credit, and overall market volatility risks. Due to the level of risk associated with certain investments, it is reasonably possible that changes in the value of investments will occur in the near term and that such changes could materially affect participants’ account balances and the amounts reported on the statements of net assets available for benefits. Additionally, some investments held by Principal are invested in the securities of foreign companies, which involve special risks and considerations not typically associated with investing in companies in the United States of America. These risks include devaluation of currencies, less reliable information about issuers, different securities transaction clearance and settlement practices, and possible adverse political and economic developments. Moreover, securities of many foreign companies and their markets may be less liquid and their prices more volatile than those of securities of comparable U.S. companies.

Description of the Plan and Significant Accounting Policies (Policies) - EBP 001

12 Months Ended

Dec. 31, 2025

EBP, Description of Plan [Line Items]

The accompanying financial statements have been prepared on the accrual basis of accounting in accordance with accounting principles generally accepted in the United States of America.

Contributions

Participants may make before-tax or Roth contributions up to 100% of their annual eligible compensation, as limited by the Internal Revenue Service (“IRS”), which is adjusted annually by the Secretary of the Treasury for inflation. Eligible employees who have reached age 50 during the Plan year may elect to make catch-up contributions, as limited by the IRS. The Plan also permits rollover contributions from other qualified retirement plans. Employee contributions to the Plan are made through regular payroll deductions.

The Company makes discretionary matching contributions of 100% of elective deferrals up to 6% of annual eligible compensation. Matching contributions are funded each pay period. The Company has the right to designate all or a portion of the matching contributions as qualified. To the extent matching contributions are so designated, they are non-forfeitable and may not be withdrawn from the Plan prior to separation from service or attainment of age 59½. Discretionary matching contributions made by the Company totaled $36 million for the year ended December 31, 2025.

Once eligibility requirements are met, employees are automatically enrolled in the Plan, and 6% of each employee’s annual eligible compensation is automatically withheld and contributed to the Plan unless the employee makes another election.

The Company may make discretionary or profit-sharing contributions.

Participant Notes Receivable

Participants may borrow from their accounts a minimum of $1,000 up to a maximum equal to the lesser of $50,000 or 50% of their vested account balances. Participants may have a maximum of one loan outstanding at any given time. The notes receivable are secured by the balances in the participants’ accounts and bear interest at The Wall Street Journal prime rate plus 1.00%, which is commensurate with local prevailing rates as determined quarterly by the Plan administrator at loan origination. Notes receivable have a maximum term of five years . In prior Plan years, the maximum term of the loans was longer for the purchase of a principal residence. Principal and interest are paid ratably through payroll deductions. Participant notes receivable are recorded in the financial statements at amortized cost (which represents unpaid principal plus accrued interest). Upon termination of a participant from employment, the participant’s loan shall continue to be payable in accordance with the provisions of the participant’s loan or be due in full.

Payment of Benefits

Upon death, disability, retirement, hardship, or termination of service, a participant may receive a lump sum payment in the amount equal to the participant’s vested account balance within a reasonable period of time. Accounts with balances less than $5,000 may be immediately distributed upon a distribution event. If the participant’s total vested balance is greater than $5,000, the participant may elect not to receive a distribution until required by law to receive required minimum distributions. The Plan allows hardship withdrawals in the event of undue financial hardship. Such withdrawal is limited to the participants’ pre-tax or Roth elective deferral contributions and earnings thereon. Benefits are recorded as distributions to participants when paid.

Administrative Expenses

Administrative expenses of the Plan are paid by the Plan or the Plan sponsor, as provided in the Plan document. Participants pay administrative costs for loans, distributions and qualified domestic relation orders. All investment management and transaction fees directly related to the Plan investments are paid by the Plan. Management fees and operating expenses charged to the Plan for investments are deducted from income earned on a daily basis and are not separately reflected. Consequently, investment management fees and operating expenses are reflected as a reduction of investment return for such investments. The Company provides, at no cost to the Plan, certain administrative, accounting, and legal services to the Plan and also pays the cost of certain outside services for the Plan. The Plan has a revenue-sharing agreement whereby a certain investment manager returns a portion of the investment management fees to the recordkeeper to offset the administrative expenses of participants invested with that investment manager.

Excess Participant Contributions Payable

The Plan is required to return participant contributions received during the Plan year in excess of the IRC limits.

Valuation of Investments and Income Recognition

Investments are recorded at fair value as reported to the Plan by the trustee. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. See Note 2 for discussion of fair value measurements.

The net realized and unrealized investment gain or loss (net appreciation or depreciation in fair value of investments) is reflected on the accompanying statement of changes in net assets available for benefits and is determined as the difference between fair value at the beginning of the year (or date purchased if during the year) and selling price (if sold during the year) or year-end fair value. Purchases and sales of investments are recorded on a trade-date basis. Interest income is recognized on the accrual basis. Dividends are recognized on the ex-dividend date.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and changes in net assets available for benefits and disclosures. Accordingly, actual results could differ from those estimates.

Risks, Uncertainties, and Concentrations

The Plan provides for various investments that, in general, are exposed to various risks, such as interest rate, credit, and overall market volatility risks. Due to the level of risk associated with certain investments, it is reasonably possible that changes in the value of investments will occur in the near term and that such changes could materially affect participants’ account balances and the amounts reported on the statements of net assets available for benefits.

Additionally, some investments held by Principal are invested in the securities of foreign companies, which involve special risks and considerations not typically associated with investing in companies in the United States of America. These risks include devaluation of currencies, less reliable information about issuers, different securities transaction clearance and settlement practices, and possible adverse political and economic developments. Moreover, securities of many foreign companies and their markets may be less liquid and their prices more volatile than those of securities of comparable U.S. companies.