Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001104659-21-022074-index-headers.html | 2021-02-12 17:00:44 | |
| 0001104659-21-022074-index.html | 2021-02-12 17:00:44 | |
| 0001104659-21-022074.txt | 2021-02-12 17:00:44 | |
 0001104659-21-022074-xbrl.zip | 1424304 | 2021-02-12 17:00:44 |
| FilingSummary.xml | 103870 | 2021-02-12 17:00:44 |
| Financial_Report.xlsx | 388417 | 2021-02-12 17:00:44 |
| MetaLinks.json | 2168389 | 2021-02-12 17:00:44 |
| pfg-20201231.xsd | 230822 | 2021-02-12 17:00:44 |
| pfg-20201231x10k.htm | 17387329 | 2021-02-12 17:00:44 |
 pfg-20201231x10k008.jpg | 29334 | 2021-02-12 17:00:44 |
| pfg-20201231x10k_htm.xml | 24384975 | 2021-02-12 17:00:44 |
| pfg-20201231xex21.htm | 99221 | 2021-02-12 17:00:44 |
| pfg-20201231xex23.htm | 8607 | 2021-02-12 17:00:44 |
| pfg-20201231xex31d1.htm | 8878 | 2021-02-12 17:00:44 |
| pfg-20201231xex31d2.htm | 9671 | 2021-02-12 17:00:44 |
| pfg-20201231xex32d1.htm | 4054 | 2021-02-12 17:00:44 |
| pfg-20201231xex32d2.htm | 4091 | 2021-02-12 17:00:44 |
| pfg-20201231xex4d5.htm | 25104 | 2021-02-12 17:00:44 |
| pfg-20201231_cal.xml | 291680 | 2021-02-12 17:00:44 |
| pfg-20201231_def.xml | 997101 | 2021-02-12 17:00:44 |
| pfg-20201231_lab.xml | 2052214 | 2021-02-12 17:00:44 |
| pfg-20201231_pre.xml | 1626471 | 2021-02-12 17:00:44 |
| R1.htm | 61096 | 2021-02-12 17:00:44 |
| R10.htm | 129169 | 2021-02-12 17:00:44 |
| R100.htm | 23201 | 2021-02-12 17:00:44 |
| R101.htm | 29891 | 2021-02-12 17:00:44 |
| R102.htm | 51619 | 2021-02-12 17:00:44 |
| R103.htm | 144008 | 2021-02-12 17:00:44 |
| R104.htm | 14362 | 2021-02-12 17:00:44 |
| R105.htm | 20711 | 2021-02-12 17:00:44 |
| R106.htm | 32167 | 2021-02-12 17:00:44 |
| R107.htm | 38741 | 2021-02-12 17:00:44 |
| R108.htm | 27234 | 2021-02-12 17:00:44 |
| R109.htm | 22636 | 2021-02-12 17:00:44 |
| R11.htm | 1367767 | 2021-02-12 17:00:44 |
| R110.htm | 85545 | 2021-02-12 17:00:44 |
| R111.htm | 5913 | 2021-02-12 17:00:44 |
| R112.htm | 78661 | 2021-02-12 17:00:44 |
| R113.htm | 11828 | 2021-02-12 17:00:44 |
| R114.htm | 7833 | 2021-02-12 17:00:44 |
| R115.htm | 14482 | 2021-02-12 17:00:44 |
| R116.htm | 67916 | 2021-02-12 17:00:44 |
| R117.htm | 60426 | 2021-02-12 17:00:44 |
| R118.htm | 90400 | 2021-02-12 17:00:44 |
| R119.htm | 24115 | 2021-02-12 17:00:44 |
| R12.htm | 678109 | 2021-02-12 17:00:44 |
| R120.htm | 24578 | 2021-02-12 17:00:44 |
| R121.htm | 78851 | 2021-02-12 17:00:44 |
| R122.htm | 31618 | 2021-02-12 17:00:44 |
| R123.htm | 19968 | 2021-02-12 17:00:44 |
| R124.htm | 111384 | 2021-02-12 17:00:44 |
| R125.htm | 20304 | 2021-02-12 17:00:44 |
| R126.htm | 84466 | 2021-02-12 17:00:44 |
| R127.htm | 93765 | 2021-02-12 17:00:44 |
| R128.htm | 7681 | 2021-02-12 17:00:44 |
| R129.htm | 108486 | 2021-02-12 17:00:44 |
| R13.htm | 134746 | 2021-02-12 17:00:44 |
| R130.htm | 139397 | 2021-02-12 17:00:44 |
| R131.htm | 34018 | 2021-02-12 17:00:44 |
| R132.htm | 161590 | 2021-02-12 17:00:44 |
| R133.htm | 12805 | 2021-02-12 17:00:44 |
| R134.htm | 41694 | 2021-02-12 17:00:44 |
| R135.htm | 15485 | 2021-02-12 17:00:44 |
| R136.htm | 17560 | 2021-02-12 17:00:44 |
| R137.htm | 75494 | 2021-02-12 17:00:44 |
| R138.htm | 25665 | 2021-02-12 17:00:44 |
| R139.htm | 27698 | 2021-02-12 17:00:44 |
| R14.htm | 31443 | 2021-02-12 17:00:44 |
| R140.htm | 16735 | 2021-02-12 17:00:44 |
| R141.htm | 46291 | 2021-02-12 17:00:44 |
| R142.htm | 102478 | 2021-02-12 17:00:44 |
| R143.htm | 11060 | 2021-02-12 17:00:44 |
| R144.htm | 29647 | 2021-02-12 17:00:44 |
| R145.htm | 51143 | 2021-02-12 17:00:44 |
| R146.htm | 35530 | 2021-02-12 17:00:44 |
| R147.htm | 26327 | 2021-02-12 17:00:44 |
| R148.htm | 59290 | 2021-02-12 17:00:44 |
| R149.htm | 19857 | 2021-02-12 17:00:44 |
| R15.htm | 708518 | 2021-02-12 17:00:44 |
| R150.htm | 56912 | 2021-02-12 17:00:44 |
| R151.htm | 41216 | 2021-02-12 17:00:44 |
| R152.htm | 179303 | 2021-02-12 17:00:44 |
| R153.htm | 145438 | 2021-02-12 17:00:44 |
| R154.htm | 109994 | 2021-02-12 17:00:44 |
| R155.htm | 69181 | 2021-02-12 17:00:44 |
| R156.htm | 78484 | 2021-02-12 17:00:44 |
| R157.htm | 17829 | 2021-02-12 17:00:44 |
| R158.htm | 50310 | 2021-02-12 17:00:44 |
| R159.htm | 96578 | 2021-02-12 17:00:44 |
| R16.htm | 176120 | 2021-02-12 17:00:44 |
| R160.htm | 13210 | 2021-02-12 17:00:44 |
| R161.htm | 47941 | 2021-02-12 17:00:44 |
| R162.htm | 33850 | 2021-02-12 17:00:44 |
| R17.htm | 211168 | 2021-02-12 17:00:44 |
| R18.htm | 802262 | 2021-02-12 17:00:44 |
| R19.htm | 120034 | 2021-02-12 17:00:44 |
| R2.htm | 118203 | 2021-02-12 17:00:44 |
| R20.htm | 427178 | 2021-02-12 17:00:44 |
| R21.htm | 1704282 | 2021-02-12 17:00:44 |
| R22.htm | 23677 | 2021-02-12 17:00:44 |
| R23.htm | 250304 | 2021-02-12 17:00:44 |
| R24.htm | 321101 | 2021-02-12 17:00:44 |
| R25.htm | 146784 | 2021-02-12 17:00:44 |
| R26.htm | 54343 | 2021-02-12 17:00:44 |
| R27.htm | 67650 | 2021-02-12 17:00:44 |
| R28.htm | 1425767 | 2021-02-12 17:00:44 |
| R29.htm | 104820 | 2021-02-12 17:00:44 |
| R3.htm | 45333 | 2021-02-12 17:00:44 |
| R30.htm | 215327 | 2021-02-12 17:00:44 |
| R31.htm | 184975 | 2021-02-12 17:00:44 |
| R32.htm | 127175 | 2021-02-12 17:00:44 |
| R33.htm | 217012 | 2021-02-12 17:00:44 |
| R34.htm | 40750 | 2021-02-12 17:00:44 |
| R35.htm | 92423 | 2021-02-12 17:00:44 |
| R36.htm | 116479 | 2021-02-12 17:00:44 |
| R37.htm | 1363505 | 2021-02-12 17:00:44 |
| R38.htm | 664091 | 2021-02-12 17:00:44 |
| R39.htm | 134096 | 2021-02-12 17:00:44 |
| R4.htm | 73544 | 2021-02-12 17:00:44 |
| R40.htm | 31115 | 2021-02-12 17:00:44 |
| R41.htm | 710325 | 2021-02-12 17:00:44 |
| R42.htm | 169584 | 2021-02-12 17:00:44 |
| R43.htm | 208181 | 2021-02-12 17:00:44 |
| R44.htm | 792695 | 2021-02-12 17:00:44 |
| R45.htm | 111621 | 2021-02-12 17:00:44 |
| R46.htm | 431352 | 2021-02-12 17:00:44 |
| R47.htm | 1677578 | 2021-02-12 17:00:44 |
| R48.htm | 18558 | 2021-02-12 17:00:44 |
| R49.htm | 230114 | 2021-02-12 17:00:44 |
| R5.htm | 39465 | 2021-02-12 17:00:44 |
| R50.htm | 313908 | 2021-02-12 17:00:44 |
| R51.htm | 139392 | 2021-02-12 17:00:44 |
| R52.htm | 53201 | 2021-02-12 17:00:44 |
| R53.htm | 67199 | 2021-02-12 17:00:44 |
| R54.htm | 1420735 | 2021-02-12 17:00:44 |
| R55.htm | 47368 | 2021-02-12 17:00:44 |
| R56.htm | 7760 | 2021-02-12 17:00:44 |
| R57.htm | 10378 | 2021-02-12 17:00:44 |
| R58.htm | 40789 | 2021-02-12 17:00:44 |
| R59.htm | 25209 | 2021-02-12 17:00:44 |
| R6.htm | 72607 | 2021-02-12 17:00:44 |
| R60.htm | 17471 | 2021-02-12 17:00:44 |
| R61.htm | 29625 | 2021-02-12 17:00:44 |
| R62.htm | 6972 | 2021-02-12 17:00:44 |
| R63.htm | 32368 | 2021-02-12 17:00:44 |
| R64.htm | 49143 | 2021-02-12 17:00:44 |
| R65.htm | 49937 | 2021-02-12 17:00:44 |
| R66.htm | 36336 | 2021-02-12 17:00:44 |
| R67.htm | 29939 | 2021-02-12 17:00:44 |
| R68.htm | 35290 | 2021-02-12 17:00:44 |
| R69.htm | 25920 | 2021-02-12 17:00:44 |
| R7.htm | 123658 | 2021-02-12 17:00:44 |
| R70.htm | 15066 | 2021-02-12 17:00:44 |
| R71.htm | 15143 | 2021-02-12 17:00:44 |
| R72.htm | 83160 | 2021-02-12 17:00:44 |
| R73.htm | 17905 | 2021-02-12 17:00:44 |
| R74.htm | 96097 | 2021-02-12 17:00:44 |
| R75.htm | 66857 | 2021-02-12 17:00:44 |
| R76.htm | 54193 | 2021-02-12 17:00:44 |
| R77.htm | 58077 | 2021-02-12 17:00:44 |
| R78.htm | 5978 | 2021-02-12 17:00:44 |
| R79.htm | 57207 | 2021-02-12 17:00:44 |
| R8.htm | 171775 | 2021-02-12 17:00:44 |
| R80.htm | 9573 | 2021-02-12 17:00:44 |
| R81.htm | 17598 | 2021-02-12 17:00:44 |
| R82.htm | 13057 | 2021-02-12 17:00:44 |
| R83.htm | 50614 | 2021-02-12 17:00:44 |
| R84.htm | 29323 | 2021-02-12 17:00:44 |
| R85.htm | 24645 | 2021-02-12 17:00:44 |
| R86.htm | 15052 | 2021-02-12 17:00:44 |
| R87.htm | 16049 | 2021-02-12 17:00:44 |
| R88.htm | 57316 | 2021-02-12 17:00:44 |
| R89.htm | 16927 | 2021-02-12 17:00:44 |
| R9.htm | 92304 | 2021-02-12 17:00:44 |
| R90.htm | 57774 | 2021-02-12 17:00:44 |
| R91.htm | 31284 | 2021-02-12 17:00:44 |
| R92.htm | 10749 | 2021-02-12 17:00:44 |
| R93.htm | 16715 | 2021-02-12 17:00:44 |
| R94.htm | 15653 | 2021-02-12 17:00:44 |
| R95.htm | 41184 | 2021-02-12 17:00:44 |
| R96.htm | 32373 | 2021-02-12 17:00:44 |
| R97.htm | 101549 | 2021-02-12 17:00:44 |
| R98.htm | 30002 | 2021-02-12 17:00:44 |
| R99.htm | 28948 | 2021-02-12 17:00:44 |
| report.css | 2768 | 2021-02-12 17:00:44 |
| Show.js | 1086 | 2021-02-12 17:00:44 |