XML 62 R2.htm IDEA: XBRL DOCUMENT
v3.25.1

Pay vs Performance Disclosure - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pay vs Performance Disclosure |  |  |  |  |
Pay vs Performance Disclosure, Table |
​ | ​ | ​ | ​ | Summary compensation table total for PEO 1 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Average summary compensation table total for non-PEO NEOs 2,4 | ​ | ​ | Average compensation actually paid to non-PEO NEOs 2,3,4 | ​ | ​ | Value of initial fixed $100 investment based on: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Non-GAAP operating earnings (in millions)6 | ​
​ | Year | ​ | ​ | Compensation actually paid to PEO 1,3 | ​ | ​ | Total shareholder return | ​ | ​ | Peer group total shareholder return 5 | ​ | ​ | Net income (in millions)6 | ​
​ | 2024 | ​ | ​ | ​ | ​ | $16,438,184 | ​ | ​ | ​ | ​ | ​ | $14,201,915 | ​ | ​ | ​ | ​ | ​ | $4,519,834 | ​ | ​ | ​ | ​ | ​ | $4,208,952 | ​ | ​ | ​ | ​ | ​ | $170.59 | ​ | ​ | ​ | ​ | ​ | $173.90 | ​ | ​ | ​ | ​ | ​ | $1,597.9 | ​ | ​ | ​ | ​ | ​ | $1,640.5 | ​ | ​
​ | 2023 | ​ | ​ | ​ | ​ | $15,118,828 | ​ | ​ | ​ | ​ | ​ | $12,277,460 | ​ | ​ | ​ | ​ | ​ | $5,445,220 | ​ | ​ | ​ | ​ | ​ | $4,620,616 | ​ | ​ | ​ | ​ | ​ | $167.46 | ​ | ​ | ​ | ​ | ​ | $141.43 | ​ | ​ | ​ | ​ | ​ | $670.1 | ​ | ​ | ​ | ​ | ​ | $1,602.8 | ​ | ​
​ | 2022 | ​ | ​ | ​ | ​ | $13,804,149 | ​ | ​ | ​ | ​ | ​ | $22,337,042 | ​ | ​ | ​ | ​ | ​ | $4,697,081 | ​ | ​ | ​ | ​ | ​ | $6,610,684 | ​ | ​ | ​ | ​ | ​ | $172.34 | ​ | ​ | ​ | ​ | ​ | $128.51 | ​ | ​ | ​ | ​ | ​ | $4,852.2 | ​ | ​ | ​ | ​ | ​ | $1,700.9 | ​ | ​
​ | 2021 | ​ | ​ | ​ | ​ | $17,566,163 | ​ | ​ | ​ | ​ | ​ | $30,384,681 | ​ | ​ | ​ | ​ | ​ | $5,217,527 | ​ | ​ | ​ | ​ | ​ | $7,526,148 | ​ | ​ | ​ | ​ | ​ | $143.50 | ​ | ​ | ​ | ​ | ​ | $136.28 | ​ | ​ | ​ | ​ | ​ | $1,757.4 | ​ | ​ | ​ | ​ | ​ | $1,847.6 | ​ | ​
​ | 2020 | ​ | ​ | ​ | ​ | $15,614,418 | ​ | ​ | ​ | ​ | ​ | $9,311,899 | ​ | ​ | ​ | ​ | ​ | $4,508,046 | ​ | ​ | ​ | ​ | ​ | $3,109,284 | ​ | ​ | ​ | ​ | ​ | $94.81 | ​ | ​ | ​ | ​ | ​ | $100.64 | ​ | ​ | ​ | ​ | ​ | $1,428.5 | ​ | ​ | ​ | ​ | ​ | $1,366.4 | ​ | ​
​ 1 Daniel J. Houston was our Chief Executive Officer in all years reported. ​ 2 During 2024, our non-PEO-NEOs consisted of Deanna D. Strable-Soethout, Kamal Bhatia, Amy C. Friedrich, Christopher J. Littlefield, and Joel M. Pitz. During 2023, our non-PEO NEOs consisted of Deanna D. Strable-Soethout, Patrick G. Halter, Amy C. Friedrich, and Vivek Agrawal. During 2022, our non-PEO NEOs consisted of Deanna D. Strable-Soethout, Patrick G. Halter, Amy C. Friedrich, and Natalie Lamarque. During 2021, our non-PEO NEOs consisted of Deanna D. Strable-Soethout, Patrick G. Halter, Amy C. Friedrich and Renee Schaff. During 2020, our non-PEO NEOs consisted of Deanna D. Strable-Soethout, Patrick G. Halter, Timothy M. Dunbar and Luis Valdes. ​ 3 Adjustments were as follows: ​
​ | ​ | ​ | ​ | 2024 | ​
​ | Adjustments to determine “compensation actually paid” for PEO and non-PEO NEOs | ​ | ​ | PEO | ​ | ​ | NEOs | ​
​ | Deduction for Change in the Actuarial Present Values reported under the “Change in Pension Value and Nonqualified Deferred Compensation Earnings” Column of the SCT | ​ | ​ | ​ | ​ | $790,074 | ​ | ​ | ​ | ​ | ​ | $25,833 | ​ | ​
​ | Increase for “Service Cost” for Pension Plans | ​ | ​ | ​ | ​ | $369,096 | ​ | ​ | ​ | ​ | ​ | $114,327 | ​ | ​
​ | Increase for “Prior Service Cost” for Pension Plans | ​ | ​ | ​ | ​ | $0 | ​ | ​ | ​ | ​ | ​ | $0 | ​ | ​
​ | Deduction for Amounts Reported under the “Stock Awards” Column in the SCT | ​ | ​ | ​ | ​ | $10,389,399 | ​ | ​ | ​ | ​ | ​ | $2,467,947 | ​ | ​
​ | Deduction for Amounts Reported under the “Option Awards” Column in the SCT | ​ | ​ | ​ | ​ | $0 | ​ | ​ | ​ | ​ | ​ | $0 | ​ | ​
​ | Increase for Fair Value of Awards Granted during year that Remain Unvested as of Year-end | ​ | ​ | ​ | ​ | $9,318,582 | ​ | ​ | ​ | ​ | ​ | $2,222,065 | ​ | ​
​ | Increase for Fair Value of Awards Granted during year that Vest during year | ​ | ​ | ​ | ​ | $0 | ​ | ​ | ​ | ​ | ​ | $0 | ​ | ​
​ | Increase/deduction for Change in Fair Value from prior Year-end to current Year-end of Awards Granted Prior to year that were Outstanding and Unvested as of Year-end | ​ | ​ | ​ | ​ | $(1,009,559) | ​ | ​ | ​ | ​ | ​ | $(221,054) | ​ | ​
​ | Increase/deduction for Change in Fair Value from prior Year-end to Vesting Date of Awards Granted Prior to year that Vested during year | ​ | ​ | ​ | ​ | ($744,908) | ​ | ​ | ​ | ​ | ​ | $(152,646) | ​ | ​
​ | Deduction of Fair Value of Awards Granted Prior to year that were Forfeited during year | ​ | ​ | ​ | ​ | $0 | ​ | ​ | ​ | ​ | ​ | $0 | ​ | ​
​ | Increase based upon Incremental Fair Value of Awards Modified during year | ​ | ​ | ​ | ​ | $0 | ​ | ​ | ​ | ​ | ​ | $0 | ​ | ​
​ | Increase based on Dividends or Other Earnings Paid during year prior to Vesting Date of Award | ​ | ​ | ​ | ​ | $1,009,993 | ​ | ​ | ​ | ​ | ​ | $220,206 | ​ | ​
​ | Total Adjustments | ​ | ​ | ​ | ​ | $(2,236,269) | ​ | ​ | ​ | ​ | ​ | $(310,882) | ​ | ​
​ 4 Excluding Mr. Pitz, Interim Chief Financial Officer, Non-PEO NEO Average Summary Compensation Table Total would have been $5,190,832, Non-PEO NEO Average Compensation Actually Paid would have been $4,808,484. ​ 5 Peer Group used is the S&P 500 Financials Index. ​ 6 In 2023, Principal adopted new accounting guidance that required us to recast 2021 and 2022 financial results. Amounts shown were used to determine executive compensation based on accounting policies during the period. Additional details of our implementation of the new accounting guidance can be found in Note 1 of the Notes to the Consolidated Financial Statements in Item 8 of our 2023 Form 10-K. |  |  |  |
Company Selected Measure Name | Non-GAAP operating earnings |  |  |  |
Named Executive Officers, Footnote | 1 Daniel J. Houston was our Chief Executive Officer in all years reported. ​ 2 During 2024, our non-PEO-NEOs consisted of Deanna D. Strable-Soethout, Kamal Bhatia, Amy C. Friedrich, Christopher J. Littlefield, and Joel M. Pitz. During 2023, our non-PEO NEOs consisted of Deanna D. Strable-Soethout, Patrick G. Halter, Amy C. Friedrich, and Vivek Agrawal. During 2022, our non-PEO NEOs consisted of Deanna D. Strable-Soethout, Patrick G. Halter, Amy C. Friedrich, and Natalie Lamarque. During 2021, our non-PEO NEOs consisted of Deanna D. Strable-Soethout, Patrick G. Halter, Amy C. Friedrich and Renee Schaff. During 2020, our non-PEO NEOs consisted of Deanna D. Strable-Soethout, Patrick G. Halter, Timothy M. Dunbar and Luis Valdes |  |  |  |
Peer Group Issuers, Footnote | 5 Peer Group used is the S&P 500 Financials Index. |  |  |  |
PEO Total Compensation Amount | $ 16,438,184 | $ 15,118,828 | $ 13,804,149 | $ 17,566,163 | $ 15,614,418
PEO Actually Paid Compensation Amount | $ 14,201,915 | 12,277,460 | 22,337,042 | 30,384,681 | 9,311,899
Adjustment To PEO Compensation, Footnote | 3 Adjustments were as follows: ​
​ | ​ | ​ | ​ | 2024 | ​
​ | Adjustments to determine “compensation actually paid” for PEO and non-PEO NEOs | ​ | ​ | PEO | ​ | ​ | NEOs | ​
​ | Deduction for Change in the Actuarial Present Values reported under the “Change in Pension Value and Nonqualified Deferred Compensation Earnings” Column of the SCT | ​ | ​ | ​ | ​ | $790,074 | ​ | ​ | ​ | ​ | ​ | $25,833 | ​ | ​
​ | Increase for “Service Cost” for Pension Plans | ​ | ​ | ​ | ​ | $369,096 | ​ | ​ | ​ | ​ | ​ | $114,327 | ​ | ​
​ | Increase for “Prior Service Cost” for Pension Plans | ​ | ​ | ​ | ​ | $0 | ​ | ​ | ​ | ​ | ​ | $0 | ​ | ​
​ | Deduction for Amounts Reported under the “Stock Awards” Column in the SCT | ​ | ​ | ​ | ​ | $10,389,399 | ​ | ​ | ​ | ​ | ​ | $2,467,947 | ​ | ​
​ | Deduction for Amounts Reported under the “Option Awards” Column in the SCT | ​ | ​ | ​ | ​ | $0 | ​ | ​ | ​ | ​ | ​ | $0 | ​ | ​
​ | Increase for Fair Value of Awards Granted during year that Remain Unvested as of Year-end | ​ | ​ | ​ | ​ | $9,318,582 | ​ | ​ | ​ | ​ | ​ | $2,222,065 | ​ | ​
​ | Increase for Fair Value of Awards Granted during year that Vest during year | ​ | ​ | ​ | ​ | $0 | ​ | ​ | ​ | ​ | ​ | $0 | ​ | ​
​ | Increase/deduction for Change in Fair Value from prior Year-end to current Year-end of Awards Granted Prior to year that were Outstanding and Unvested as of Year-end | ​ | ​ | ​ | ​ | $(1,009,559) | ​ | ​ | ​ | ​ | ​ | $(221,054) | ​ | ​
​ | Increase/deduction for Change in Fair Value from prior Year-end to Vesting Date of Awards Granted Prior to year that Vested during year | ​ | ​ | ​ | ​ | ($744,908) | ​ | ​ | ​ | ​ | ​ | $(152,646) | ​ | ​
​ | Deduction of Fair Value of Awards Granted Prior to year that were Forfeited during year | ​ | ​ | ​ | ​ | $0 | ​ | ​ | ​ | ​ | ​ | $0 | ​ | ​
​ | Increase based upon Incremental Fair Value of Awards Modified during year | ​ | ​ | ​ | ​ | $0 | ​ | ​ | ​ | ​ | ​ | $0 | ​ | ​
​ | Increase based on Dividends or Other Earnings Paid during year prior to Vesting Date of Award | ​ | ​ | ​ | ​ | $1,009,993 | ​ | ​ | ​ | ​ | ​ | $220,206 | ​ | ​
​ | Total Adjustments | ​ | ​ | ​ | ​ | $(2,236,269) | ​ | ​ | ​ | ​ | ​ | $(310,882) | ​ | ​
Non-PEO NEO Average Total Compensation Amount | $ 4,519,834 | 5,445,220 | 4,697,081 | 5,217,527 | 4,508,046
Non-PEO NEO Average Compensation Actually Paid Amount | $ 4,208,952 | 4,620,616 | 6,610,684 | 7,526,148 | 3,109,284
Adjustment to Non-PEO NEO Compensation Footnote | 3 Adjustments were as follows: ​
​ | ​ | ​ | ​ | 2024 | ​
​ | Adjustments to determine “compensation actually paid” for PEO and non-PEO NEOs | ​ | ​ | PEO | ​ | ​ | NEOs | ​
​ | Deduction for Change in the Actuarial Present Values reported under the “Change in Pension Value and Nonqualified Deferred Compensation Earnings” Column of the SCT | ​ | ​ | ​ | ​ | $790,074 | ​ | ​ | ​ | ​ | ​ | $25,833 | ​ | ​
​ | Increase for “Service Cost” for Pension Plans | ​ | ​ | ​ | ​ | $369,096 | ​ | ​ | ​ | ​ | ​ | $114,327 | ​ | ​
​ | Increase for “Prior Service Cost” for Pension Plans | ​ | ​ | ​ | ​ | $0 | ​ | ​ | ​ | ​ | ​ | $0 | ​ | ​
​ | Deduction for Amounts Reported under the “Stock Awards” Column in the SCT | ​ | ​ | ​ | ​ | $10,389,399 | ​ | ​ | ​ | ​ | ​ | $2,467,947 | ​ | ​
​ | Deduction for Amounts Reported under the “Option Awards” Column in the SCT | ​ | ​ | ​ | ​ | $0 | ​ | ​ | ​ | ​ | ​ | $0 | ​ | ​
​ | Increase for Fair Value of Awards Granted during year that Remain Unvested as of Year-end | ​ | ​ | ​ | ​ | $9,318,582 | ​ | ​ | ​ | ​ | ​ | $2,222,065 | ​ | ​
​ | Increase for Fair Value of Awards Granted during year that Vest during year | ​ | ​ | ​ | ​ | $0 | ​ | ​ | ​ | ​ | ​ | $0 | ​ | ​
​ | Increase/deduction for Change in Fair Value from prior Year-end to current Year-end of Awards Granted Prior to year that were Outstanding and Unvested as of Year-end | ​ | ​ | ​ | ​ | $(1,009,559) | ​ | ​ | ​ | ​ | ​ | $(221,054) | ​ | ​
​ | Increase/deduction for Change in Fair Value from prior Year-end to Vesting Date of Awards Granted Prior to year that Vested during year | ​ | ​ | ​ | ​ | ($744,908) | ​ | ​ | ​ | ​ | ​ | $(152,646) | ​ | ​
​ | Deduction of Fair Value of Awards Granted Prior to year that were Forfeited during year | ​ | ​ | ​ | ​ | $0 | ​ | ​ | ​ | ​ | ​ | $0 | ​ | ​
​ | Increase based upon Incremental Fair Value of Awards Modified during year | ​ | ​ | ​ | ​ | $0 | ​ | ​ | ​ | ​ | ​ | $0 | ​ | ​
​ | Increase based on Dividends or Other Earnings Paid during year prior to Vesting Date of Award | ​ | ​ | ​ | ​ | $1,009,993 | ​ | ​ | ​ | ​ | ​ | $220,206 | ​ | ​
​ | Total Adjustments | ​ | ​ | ​ | ​ | $(2,236,269) | ​ | ​ | ​ | ​ | ​ | $(310,882) | ​ | ​
4 Excluding Mr. Pitz, Interim Chief Financial Officer, Non-PEO NEO Average Summary Compensation Table Total would have been $5,190,832, Non-PEO NEO Average Compensation Actually Paid would have been $4,808,484. |  |  |  |
Compensation Actually Paid vs. Total Shareholder Return | Compensation actually paid vs. total shareholder return |  |  |  |
Compensation Actually Paid vs. Net Income | Compensation actually paid vs. net income ($M) |  |  |  |
Compensation Actually Paid vs. Company Selected Measure | Compensation actually paid vs. non-GAAP operating earnings |  |  |  |
Total Shareholder Return Vs Peer Group | Compensation actually paid vs. total shareholder return |  |  |  |
Tabular List, Table | Pay versus performance—tabular list of most important financial performance measures
​ | Financial performance measures | ​
​ | Non-GAAP Operating Earnings | ​
​ | Non-GAAP Return on Equity | ​
​ | Operating Margin | ​
Total Shareholder Return Amount | $ 170.59 | 167.46 | 172.34 | 143.5 | 94.81
Peer Group Total Shareholder Return Amount | 173.9 | 141.43 | 128.51 | 136.28 | 100.64
Net Income (Loss) | $ 1,597,900,000 | $ 670,100,000 | $ 4,852,200,000 | $ 1,757,400,000 | $ 1,428,500,000
Company Selected Measure Amount | 1,640,500,000 | 1,602,800,000 | 1,700,900,000 | 1,847,600,000 | 1,366,400,000
PEO Name | Daniel J. Houston |  |  |  |
Measure:: 1 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Non-GAAP Operating Earnings |  |  |  |
Measure:: 2 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Non-GAAP Return on Equity |  |  |  |
Measure:: 3 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Operating Margin |  |  |  |
Non-PEO NEO Excluding Interim Chief Financial Officer [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Non-PEO NEO Average Total Compensation Amount | $ 5,190,832 |  |  |  |
Non-PEO NEO Average Compensation Actually Paid Amount | 4,808,484 |  |  |  |
PEO |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (2,236,269) |  |  |  |
PEO | Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (790,074) |  |  |  |
PEO | Pension Adjustments Service Cost |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 369,096 |  |  |  |
PEO | Pension Adjustments Prior Service Cost |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
PEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (10,389,399) |  |  |  |
PEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 9,318,582 |  |  |  |
PEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (1,009,559) |  |  |  |
PEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
PEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (744,908) |  |  |  |
PEO | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 1,009,993 |  |  |  |
PEO | Option Awards Adjustments [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
PEO | Change In Fair Value Of Awards Granted Prior To Year That Were Forfeited During Year [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
PEO | Increase Based Upon Incremental Fair ValueO f Awards Modified During Year [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
Non-PEO NEO |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (310,882) |  |  |  |
Non-PEO NEO | Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (25,833) |  |  |  |
Non-PEO NEO | Pension Adjustments Service Cost |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 114,327 |  |  |  |
Non-PEO NEO | Pension Adjustments Prior Service Cost |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
Non-PEO NEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (2,467,947) |  |  |  |
Non-PEO NEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 2,222,065 |  |  |  |
Non-PEO NEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (221,054) |  |  |  |
Non-PEO NEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
Non-PEO NEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (152,646) |  |  |  |
Non-PEO NEO | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 220,206 |  |  |  |
Non-PEO NEO | Option Awards Adjustments [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
Non-PEO NEO | Change In Fair Value Of Awards Granted Prior To Year That Were Forfeited During Year [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
Non-PEO NEO | Increase Based Upon Incremental Fair ValueO f Awards Modified During Year [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | $ 0 |  |  |  |

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToNonPeoNeoCompFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToPeoCompFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_CoSelectedMeasureAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_CoSelectedMeasureName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph iii + Details
Name: | ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph ii + Details
Name: | ecd_CompActuallyPaidVsNetIncomeTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph i + Details
Name: | ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_MeasureName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_NamedExecutiveOfficersFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iii + Details
Name: | ecd_NonPeoNeoAvgCompActuallyPaidAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph ii + Details
Name: | ecd_NonPeoNeoAvgTotalCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_PeerGroupIssuersFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_PeerGroupTotalShareholderRtnAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iii + Details
Name: | ecd_PeoActuallyPaidCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_PeoName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph ii + Details
Name: | ecd_PeoTotalCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 1 + Details
Name: | ecd_PvpTable
Namespace Prefix: | ecd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 1 + Details
Name: | ecd_PvpTableTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 6 + Details
Name: | ecd_TabularListTableTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_TotalShareholderRtnAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph iv + Details
Name: | ecd_TotalShareholderRtnVsPeerGroupTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-9 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 60 -Name Accounting Standards Codification -Section 65 -Paragraph 1 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476176/805-60-65-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 323 -Name Accounting Standards Codification -Section 65 -Paragraph 2 -Subparagraph (g)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478666/740-323-65-2 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(20)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482765/220-10-50-6 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-3 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-1 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 1 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480175/815-40-65-1 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-8 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-11 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-11 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-4 Reference 17: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479168/946-830-55-10 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section 45 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479105/946-220-45-7 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(18)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(9)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(1)(d)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3 Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 23: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(ii)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 29: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(B)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 30: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 31: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 32: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 60B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482689/260-10-45-60B Reference 33: http://www.xbrl.org/2003/role/disclosureRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483499/205-20-50-7 Reference 34: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 35: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-1A Reference 36: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-1B Reference 37: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(22)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
Name: | us-gaap_NetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ecd_MeasureAxis=1
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_MeasureAxis=2
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_MeasureAxis=3
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_IndividualAxis=pfg_NonPEONEOExcludingInterimChiefFinancialOfficerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_ExecutiveCategoryAxis=ecd_PeoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=ecd_PnsnAdjsSvcCstMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=ecd_PnsnAdjsPrrSvcCstMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=pfg_OptionAwardsAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=pfg_ChangeInFairValueOfAwardsGrantedPriorToYearThatWereForfeitedDuringYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=pfg_IncreaseBasedUponIncrementalFairValueOfAwardsModifiedDuringYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_ExecutiveCategoryAxis=ecd_NonPeoNeoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |