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| 0001104659-22-052272-index.html | 2022-04-28 16:18:42 | |
| 0001104659-22-052272.txt | 2022-04-28 16:18:42 | |
 0001104659-22-052272-xbrl.zip | 26532 | 2022-04-28 16:18:42 |
| FilingSummary.xml | 1643 | 2022-04-28 16:18:42 |
| Financial_Report.xlsx | 5645 | 2022-04-28 16:18:42 |
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| pfg-20220428.xsd | 3033 | 2022-04-28 16:18:42 |
| pfg-20220428_lab.xml | 34476 | 2022-04-28 16:18:42 |
| pfg-20220428_pre.xml | 22596 | 2022-04-28 16:18:42 |
| R1.htm | 38667 | 2022-04-28 16:18:42 |
| report.css | 2767 | 2022-04-28 16:18:42 |
| Show.js | 1085 | 2022-04-28 16:18:42 |
| tm2213912d1_8k.htm | 26893 | 2022-04-28 16:18:42 |
| tm2213912d1_8k_htm.xml | 3463 | 2022-04-28 16:18:42 |
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| tm2213912d1_ex99.htm | 233235 | 2022-04-28 16:18:42 |