Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000352541-21-000022-index-headers.html | 2021-02-19 14:31:18 | |
| 0000352541-21-000022-index.html | 2021-02-19 14:31:18 | |
| 0000352541-21-000022.txt | 2021-02-19 14:31:18 | |
 0000352541-21-000022-xbrl.zip | 1270851 | 2021-02-19 14:31:18 |
| FilingSummary.xml | 82599 | 2021-02-19 14:31:18 |
| Financial_Report.xlsx | 247949 | 2021-02-19 14:31:18 |
| lnt-20201231.htm | 7198330 | 2021-02-19 14:31:18 |
| lnt-20201231.xsd | 118147 | 2021-02-19 14:31:18 |
| lnt-20201231_cal.xml | 145024 | 2021-02-19 14:31:18 |
| lnt-20201231_def.xml | 1160625 | 2021-02-19 14:31:18 |
 lnt-20201231_g1.jpg | 334542 | 2021-02-19 14:31:18 |
 lnt-20201231_g2.jpg | 13249 | 2021-02-19 14:31:18 |
 lnt-20201231_g3.jpg | 13247 | 2021-02-19 14:31:18 |
 lnt-20201231_g4.jpg | 11606 | 2021-02-19 14:31:18 |
 lnt-20201231_g5.jpg | 11627 | 2021-02-19 14:31:18 |
 lnt-20201231_g6.jpg | 13604 | 2021-02-19 14:31:18 |
 lnt-20201231_g7.jpg | 10675 | 2021-02-19 14:31:18 |
 lnt-20201231_g8.jpg | 10746 | 2021-02-19 14:31:18 |
| lnt-20201231_htm.xml | 15173147 | 2021-02-19 14:31:18 |
| lnt-20201231_lab.xml | 1247902 | 2021-02-19 14:31:18 |
| lnt-20201231_pre.xml | 1222030 | 2021-02-19 14:31:18 |
| lnt1231202010-kex1014.htm | 7488 | 2021-02-19 14:31:18 |
| lnt1231202010-kex211.htm | 3479 | 2021-02-19 14:31:18 |
| lnt1231202010-kex231.htm | 2420 | 2021-02-19 14:31:18 |
| lnt1231202010-kex232.htm | 2174 | 2021-02-19 14:31:18 |
| lnt1231202010-kex233.htm | 2172 | 2021-02-19 14:31:18 |
| lnt1231202010-kex311.htm | 9486 | 2021-02-19 14:31:18 |
| lnt1231202010-kex312.htm | 9497 | 2021-02-19 14:31:18 |
| lnt1231202010-kex313.htm | 9482 | 2021-02-19 14:31:18 |
| lnt1231202010-kex314.htm | 9503 | 2021-02-19 14:31:18 |
| lnt1231202010-kex315.htm | 9479 | 2021-02-19 14:31:18 |
| lnt1231202010-kex316.htm | 9501 | 2021-02-19 14:31:18 |
| lnt1231202010-kex321.htm | 4450 | 2021-02-19 14:31:18 |
| lnt1231202010-kex322.htm | 4436 | 2021-02-19 14:31:18 |
| lnt1231202010-kex323.htm | 4435 | 2021-02-19 14:31:18 |
| MetaLinks.json | 1259404 | 2021-02-19 14:31:18 |
| R1.htm | 83208 | 2021-02-19 14:31:18 |
| R10.htm | 238874 | 2021-02-19 14:31:18 |
| R100.htm | 6257 | 2021-02-19 14:31:18 |
| R101.htm | 9808 | 2021-02-19 14:31:18 |
| R102.htm | 29812 | 2021-02-19 14:31:18 |
| R103.htm | 15308 | 2021-02-19 14:31:18 |
| R104.htm | 34238 | 2021-02-19 14:31:18 |
| R105.htm | 25630 | 2021-02-19 14:31:18 |
| R106.htm | 24122 | 2021-02-19 14:31:18 |
| R107.htm | 6193 | 2021-02-19 14:31:18 |
| R108.htm | 21165 | 2021-02-19 14:31:18 |
| R109.htm | 26027 | 2021-02-19 14:31:18 |
| R11.htm | 60520 | 2021-02-19 14:31:18 |
| R110.htm | 18581 | 2021-02-19 14:31:18 |
| R111.htm | 73088 | 2021-02-19 14:31:18 |
| R112.htm | 34288 | 2021-02-19 14:31:18 |
| R113.htm | 18884 | 2021-02-19 14:31:18 |
| R114.htm | 35483 | 2021-02-19 14:31:18 |
| R115.htm | 51929 | 2021-02-19 14:31:18 |
| R116.htm | 12027 | 2021-02-19 14:31:18 |
| R117.htm | 9554 | 2021-02-19 14:31:18 |
| R118.htm | 93799 | 2021-02-19 14:31:18 |
| R119.htm | 9935 | 2021-02-19 14:31:18 |
| R12.htm | 114642 | 2021-02-19 14:31:18 |
| R120.htm | 18469 | 2021-02-19 14:31:18 |
| R121.htm | 10461 | 2021-02-19 14:31:18 |
| R122.htm | 11664 | 2021-02-19 14:31:18 |
| R123.htm | 40256 | 2021-02-19 14:31:18 |
| R124.htm | 69978 | 2021-02-19 14:31:18 |
| R125.htm | 47605 | 2021-02-19 14:31:18 |
| R126.htm | 20051 | 2021-02-19 14:31:18 |
| R13.htm | 36371 | 2021-02-19 14:31:18 |
| R14.htm | 21167 | 2021-02-19 14:31:18 |
| R15.htm | 16847 | 2021-02-19 14:31:18 |
| R16.htm | 474850 | 2021-02-19 14:31:18 |
| R17.htm | 211585 | 2021-02-19 14:31:18 |
| R18.htm | 277840 | 2021-02-19 14:31:18 |
| R19.htm | 464498 | 2021-02-19 14:31:18 |
| R2.htm | 115125 | 2021-02-19 14:31:18 |
| R20.htm | 2057811 | 2021-02-19 14:31:18 |
| R21.htm | 80306 | 2021-02-19 14:31:18 |
| R22.htm | 114559 | 2021-02-19 14:31:18 |
| R23.htm | 472954 | 2021-02-19 14:31:18 |
| R24.htm | 174666 | 2021-02-19 14:31:18 |
| R25.htm | 524121 | 2021-02-19 14:31:18 |
| R26.htm | 61798 | 2021-02-19 14:31:18 |
| R27.htm | 80111 | 2021-02-19 14:31:18 |
| R28.htm | 78090 | 2021-02-19 14:31:18 |
| R29.htm | 253229 | 2021-02-19 14:31:18 |
| R3.htm | 157457 | 2021-02-19 14:31:18 |
| R30.htm | 66481 | 2021-02-19 14:31:18 |
| R31.htm | 200621 | 2021-02-19 14:31:18 |
| R32.htm | 236749 | 2021-02-19 14:31:18 |
| R33.htm | 62377 | 2021-02-19 14:31:18 |
| R34.htm | 115996 | 2021-02-19 14:31:18 |
| R35.htm | 34895 | 2021-02-19 14:31:18 |
| R36.htm | 17074 | 2021-02-19 14:31:18 |
| R37.htm | 18563 | 2021-02-19 14:31:18 |
| R38.htm | 477085 | 2021-02-19 14:31:18 |
| R39.htm | 160698 | 2021-02-19 14:31:18 |
| R4.htm | 15020 | 2021-02-19 14:31:18 |
| R40.htm | 265286 | 2021-02-19 14:31:18 |
| R41.htm | 457974 | 2021-02-19 14:31:18 |
| R42.htm | 1877598 | 2021-02-19 14:31:18 |
| R43.htm | 76941 | 2021-02-19 14:31:18 |
| R44.htm | 91706 | 2021-02-19 14:31:18 |
| R45.htm | 416217 | 2021-02-19 14:31:18 |
| R46.htm | 139087 | 2021-02-19 14:31:18 |
| R47.htm | 174949 | 2021-02-19 14:31:18 |
| R48.htm | 55972 | 2021-02-19 14:31:18 |
| R49.htm | 80528 | 2021-02-19 14:31:18 |
| R5.htm | 119273 | 2021-02-19 14:31:18 |
| R50.htm | 41147 | 2021-02-19 14:31:18 |
| R51.htm | 23457 | 2021-02-19 14:31:18 |
| R52.htm | 15100 | 2021-02-19 14:31:18 |
| R53.htm | 66827 | 2021-02-19 14:31:18 |
| R54.htm | 38203 | 2021-02-19 14:31:18 |
| R55.htm | 22289 | 2021-02-19 14:31:18 |
| R56.htm | 31690 | 2021-02-19 14:31:18 |
| R57.htm | 14639 | 2021-02-19 14:31:18 |
| R58.htm | 57958 | 2021-02-19 14:31:18 |
| R59.htm | 19003 | 2021-02-19 14:31:18 |
| R6.htm | 78488 | 2021-02-19 14:31:18 |
| R60.htm | 35680 | 2021-02-19 14:31:18 |
| R61.htm | 10605 | 2021-02-19 14:31:18 |
| R62.htm | 22322 | 2021-02-19 14:31:18 |
| R63.htm | 9265 | 2021-02-19 14:31:18 |
| R64.htm | 22023 | 2021-02-19 14:31:18 |
| R65.htm | 7211 | 2021-02-19 14:31:18 |
| R66.htm | 8001 | 2021-02-19 14:31:18 |
| R67.htm | 26194 | 2021-02-19 14:31:18 |
| R68.htm | 43626 | 2021-02-19 14:31:18 |
| R69.htm | 19375 | 2021-02-19 14:31:18 |
| R7.htm | 4614 | 2021-02-19 14:31:18 |
| R70.htm | 18558 | 2021-02-19 14:31:18 |
| R71.htm | 17198 | 2021-02-19 14:31:18 |
| R72.htm | 16673 | 2021-02-19 14:31:18 |
| R73.htm | 16656 | 2021-02-19 14:31:18 |
| R74.htm | 14081 | 2021-02-19 14:31:18 |
| R75.htm | 13429 | 2021-02-19 14:31:18 |
| R76.htm | 140176 | 2021-02-19 14:31:18 |
| R77.htm | 23905 | 2021-02-19 14:31:18 |
| R78.htm | 6575 | 2021-02-19 14:31:18 |
| R79.htm | 26498 | 2021-02-19 14:31:18 |
| R8.htm | 210104 | 2021-02-19 14:31:18 |
| R80.htm | 24338 | 2021-02-19 14:31:18 |
| R81.htm | 51730 | 2021-02-19 14:31:18 |
| R82.htm | 72644 | 2021-02-19 14:31:18 |
| R83.htm | 23559 | 2021-02-19 14:31:18 |
| R84.htm | 37326 | 2021-02-19 14:31:18 |
| R85.htm | 38721 | 2021-02-19 14:31:18 |
| R86.htm | 39845 | 2021-02-19 14:31:18 |
| R87.htm | 12442 | 2021-02-19 14:31:18 |
| R88.htm | 6325 | 2021-02-19 14:31:18 |
| R89.htm | 59310 | 2021-02-19 14:31:18 |
| R9.htm | 258851 | 2021-02-19 14:31:18 |
| R90.htm | 34145 | 2021-02-19 14:31:18 |
| R91.htm | 44232 | 2021-02-19 14:31:18 |
| R92.htm | 80167 | 2021-02-19 14:31:18 |
| R93.htm | 47591 | 2021-02-19 14:31:18 |
| R94.htm | 36389 | 2021-02-19 14:31:18 |
| R95.htm | 7648 | 2021-02-19 14:31:18 |
| R96.htm | 15083 | 2021-02-19 14:31:18 |
| R97.htm | 39018 | 2021-02-19 14:31:18 |
| R98.htm | 46234 | 2021-02-19 14:31:18 |
| R99.htm | 177538 | 2021-02-19 14:31:18 |
| report.css | 2768 | 2021-02-19 14:31:18 |
| Show.js | 1086 | 2021-02-19 14:31:18 |