Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001126956-18-000021-index-headers.html | 2018-02-01 10:27:28 | |
| 0001126956-18-000021-index.html | 2018-02-01 10:27:28 | |
| 0001126956-18-000021.txt | 2018-02-01 10:27:28 | |
 0001126956-18-000021-xbrl.zip | 271393 | 2018-02-01 10:27:28 |
| ex311spireq1.htm | 28561 | 2018-02-01 10:27:28 |
| ex312spiremissouriq1.htm | 28270 | 2018-02-01 10:27:28 |
| ex313spirealabamaq1.htm | 28048 | 2018-02-01 10:27:28 |
| ex321spireq1.htm | 15247 | 2018-02-01 10:27:28 |
| ex322spiremissouriq1.htm | 15140 | 2018-02-01 10:27:28 |
| ex323spirealabamaq1.htm | 15051 | 2018-02-01 10:27:28 |
| ex401firstsupplementalabam.htm | 150307 | 2018-02-01 10:27:28 |
| FilingSummary.xml | 29082 | 2018-02-01 10:27:28 |
| Financial_Report.xlsx | 84941 | 2018-02-01 10:27:28 |
| lg-20171231.xml | 3540744 | 2018-02-01 10:27:28 |
| lg-20171231.xsd | 46619 | 2018-02-01 10:27:28 |
| lg-20171231_cal.xml | 101563 | 2018-02-01 10:27:28 |
| lg-20171231_def.xml | 317016 | 2018-02-01 10:27:28 |
| lg-20171231_lab.xml | 618492 | 2018-02-01 10:27:28 |
| lg-20171231_pre.xml | 376328 | 2018-02-01 10:27:28 |
| R1.htm | 32761 | 2018-02-01 10:27:28 |
| R10.htm | 231800 | 2018-02-01 10:27:28 |
| R11.htm | 11110 | 2018-02-01 10:27:28 |
| R12.htm | 124272 | 2018-02-01 10:27:28 |
| R13.htm | 337570 | 2018-02-01 10:27:28 |
| R14.htm | 9540 | 2018-02-01 10:27:28 |
| R15.htm | 104586 | 2018-02-01 10:27:28 |
| R16.htm | 178615 | 2018-02-01 10:27:28 |
| R17.htm | 24294 | 2018-02-01 10:27:28 |
| R18.htm | 27679 | 2018-02-01 10:27:28 |
| R19.htm | 36010 | 2018-02-01 10:27:28 |
| R2.htm | 71032 | 2018-02-01 10:27:28 |
| R20.htm | 35785 | 2018-02-01 10:27:28 |
| R21.htm | 35048 | 2018-02-01 10:27:28 |
| R22.htm | 427323 | 2018-02-01 10:27:28 |
| R23.htm | 121829 | 2018-02-01 10:27:28 |
| R24.htm | 333482 | 2018-02-01 10:27:28 |
| R25.htm | 97591 | 2018-02-01 10:27:28 |
| R26.htm | 176568 | 2018-02-01 10:27:28 |
| R27.htm | 23279 | 2018-02-01 10:27:28 |
| R28.htm | 22605 | 2018-02-01 10:27:28 |
| R29.htm | 8539 | 2018-02-01 10:27:28 |
| R3.htm | 31535 | 2018-02-01 10:27:28 |
| R30.htm | 16253 | 2018-02-01 10:27:28 |
| R31.htm | 9933 | 2018-02-01 10:27:28 |
| R32.htm | 35985 | 2018-02-01 10:27:28 |
| R33.htm | 96229 | 2018-02-01 10:27:28 |
| R34.htm | 18130 | 2018-02-01 10:27:28 |
| R35.htm | 7124 | 2018-02-01 10:27:28 |
| R36.htm | 49696 | 2018-02-01 10:27:28 |
| R37.htm | 44780 | 2018-02-01 10:27:28 |
| R38.htm | 134936 | 2018-02-01 10:27:28 |
| R39.htm | 19948 | 2018-02-01 10:27:28 |
| R4.htm | 195878 | 2018-02-01 10:27:28 |
| R40.htm | 20581 | 2018-02-01 10:27:28 |
| R41.htm | 40916 | 2018-02-01 10:27:28 |
| R42.htm | 65392 | 2018-02-01 10:27:28 |
| R43.htm | 18537 | 2018-02-01 10:27:28 |
| R44.htm | 8112 | 2018-02-01 10:27:28 |
| R45.htm | 30233 | 2018-02-01 10:27:28 |
| R46.htm | 19752 | 2018-02-01 10:27:28 |
| R5.htm | 21500 | 2018-02-01 10:27:28 |
| R6.htm | 74794 | 2018-02-01 10:27:28 |
| R7.htm | 95607 | 2018-02-01 10:27:28 |
| R8.htm | 57196 | 2018-02-01 10:27:28 |
| R9.htm | 34854 | 2018-02-01 10:27:28 |
| report.css | 2767 | 2018-02-01 10:27:28 |
| Show.js | 1410 | 2018-02-01 10:27:28 |
| spireq1201810-qdoc.htm | 2493035 | 2018-02-01 10:27:28 |