Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001130310-21-000041-index-headers.html | 2021-08-05 06:16:35 | |
| 0001130310-21-000041-index.html | 2021-08-05 06:16:35 | |
| 0001130310-21-000041.txt | 2021-08-05 06:16:35 | |
 0001130310-21-000041-xbrl.zip | 725468 | 2021-08-05 06:16:35 |
| cehe_exhibit3112x6302021.htm | 11501 | 2021-08-05 06:16:35 |
| cehe_exhibit3122x6302021.htm | 11458 | 2021-08-05 06:16:35 |
| cehe_exhibit3212x6302021.htm | 5672 | 2021-08-05 06:16:35 |
| cehe_exhibit3222x6302021.htm | 5687 | 2021-08-05 06:16:35 |
| cerc_exhibit3113x6302021.htm | 10454 | 2021-08-05 06:16:35 |
| cerc_exhibit3123x6302021.htm | 10548 | 2021-08-05 06:16:35 |
| cerc_exhibit3213x6302021.htm | 5537 | 2021-08-05 06:16:35 |
| cerc_exhibit3223x6302021.htm | 5195 | 2021-08-05 06:16:35 |
| cnp-20210630.htm | 5320175 | 2021-08-05 06:16:35 |
| cnp-20210630.xsd | 94312 | 2021-08-05 06:16:35 |
| cnp-20210630_cal.xml | 108217 | 2021-08-05 06:16:35 |
| cnp-20210630_def.xml | 753169 | 2021-08-05 06:16:35 |
| cnp-20210630_htm.xml | 4730636 | 2021-08-05 06:16:35 |
| cnp-20210630_lab.xml | 1101311 | 2021-08-05 06:16:35 |
| cnp-20210630_pre.xml | 830164 | 2021-08-05 06:16:35 |
| cnp_ex108retentionincentiv.htm | 19461 | 2021-08-05 06:16:35 |
| cnp_ex109execchairseparati.htm | 63436 | 2021-08-05 06:16:35 |
| cnp_exhibit3111x6302021.htm | 11621 | 2021-08-05 06:16:35 |
| cnp_exhibit3121x6302021.htm | 11640 | 2021-08-05 06:16:35 |
| cnp_exhibit3211x6302021.htm | 5687 | 2021-08-05 06:16:35 |
| cnp_exhibit3221x6302021.htm | 5567 | 2021-08-05 06:16:35 |
| exhibit424cnp-fixedratesup.htm | 150601 | 2021-08-05 06:16:35 |
| exhibit425cnp-fixedratesup.htm | 181000 | 2021-08-05 06:16:35 |
| FilingSummary.xml | 55532 | 2021-08-05 06:16:35 |
| Financial_Report.xlsx | 176813 | 2021-08-05 06:16:35 |
 image_01.jpg | 9520 | 2021-08-05 06:16:35 |
 image_0b.jpg | 15694 | 2021-08-05 06:16:35 |
| MetaLinks.json | 1105732 | 2021-08-05 06:16:35 |
| R1.htm | 81333 | 2021-08-05 06:16:35 |
| R10.htm | 14292 | 2021-08-05 06:16:35 |
| R11.htm | 17554 | 2021-08-05 06:16:35 |
| R12.htm | 14601 | 2021-08-05 06:16:35 |
| R13.htm | 126352 | 2021-08-05 06:16:35 |
| R14.htm | 123505 | 2021-08-05 06:16:35 |
| R15.htm | 94765 | 2021-08-05 06:16:35 |
| R16.htm | 44562 | 2021-08-05 06:16:35 |
| R17.htm | 57477 | 2021-08-05 06:16:35 |
| R18.htm | 120835 | 2021-08-05 06:16:35 |
| R19.htm | 120962 | 2021-08-05 06:16:35 |
| R2.htm | 146075 | 2021-08-05 06:16:35 |
| R20.htm | 60758 | 2021-08-05 06:16:35 |
| R21.htm | 16042 | 2021-08-05 06:16:35 |
| R22.htm | 108359 | 2021-08-05 06:16:35 |
| R23.htm | 32435 | 2021-08-05 06:16:35 |
| R24.htm | 67711 | 2021-08-05 06:16:35 |
| R25.htm | 68206 | 2021-08-05 06:16:35 |
| R26.htm | 94540 | 2021-08-05 06:16:35 |
| R27.htm | 46509 | 2021-08-05 06:16:35 |
| R28.htm | 48871 | 2021-08-05 06:16:35 |
| R29.htm | 141210 | 2021-08-05 06:16:35 |
| R3.htm | 9639 | 2021-08-05 06:16:35 |
| R30.htm | 23550 | 2021-08-05 06:16:35 |
| R31.htm | 36904 | 2021-08-05 06:16:35 |
| R32.htm | 122847 | 2021-08-05 06:16:35 |
| R33.htm | 115429 | 2021-08-05 06:16:35 |
| R34.htm | 92807 | 2021-08-05 06:16:35 |
| R35.htm | 32578 | 2021-08-05 06:16:35 |
| R36.htm | 58826 | 2021-08-05 06:16:35 |
| R37.htm | 117303 | 2021-08-05 06:16:35 |
| R38.htm | 115300 | 2021-08-05 06:16:35 |
| R39.htm | 65962 | 2021-08-05 06:16:35 |
| R4.htm | 39671 | 2021-08-05 06:16:35 |
| R40.htm | 13712 | 2021-08-05 06:16:35 |
| R41.htm | 100816 | 2021-08-05 06:16:35 |
| R42.htm | 27228 | 2021-08-05 06:16:35 |
| R43.htm | 29499 | 2021-08-05 06:16:35 |
| R44.htm | 61377 | 2021-08-05 06:16:35 |
| R45.htm | 93255 | 2021-08-05 06:16:35 |
| R46.htm | 45614 | 2021-08-05 06:16:35 |
| R47.htm | 46752 | 2021-08-05 06:16:35 |
| R48.htm | 146047 | 2021-08-05 06:16:35 |
| R49.htm | 20909 | 2021-08-05 06:16:35 |
| R5.htm | 10108 | 2021-08-05 06:16:35 |
| R50.htm | 24948 | 2021-08-05 06:16:35 |
| R51.htm | 12757 | 2021-08-05 06:16:35 |
| R52.htm | 59082 | 2021-08-05 06:16:35 |
| R53.htm | 12424 | 2021-08-05 06:16:35 |
| R54.htm | 106405 | 2021-08-05 06:16:35 |
| R55.htm | 36292 | 2021-08-05 06:16:35 |
| R56.htm | 36979 | 2021-08-05 06:16:35 |
| R57.htm | 15978 | 2021-08-05 06:16:35 |
| R58.htm | 60078 | 2021-08-05 06:16:35 |
| R59.htm | 39340 | 2021-08-05 06:16:35 |
| R6.htm | 207006 | 2021-08-05 06:16:35 |
| R60.htm | 48983 | 2021-08-05 06:16:35 |
| R61.htm | 73050 | 2021-08-05 06:16:35 |
| R62.htm | 23629 | 2021-08-05 06:16:35 |
| R63.htm | 44632 | 2021-08-05 06:16:35 |
| R64.htm | 55507 | 2021-08-05 06:16:35 |
| R65.htm | 101967 | 2021-08-05 06:16:35 |
| R66.htm | 72873 | 2021-08-05 06:16:35 |
| R67.htm | 25861 | 2021-08-05 06:16:35 |
| R68.htm | 39730 | 2021-08-05 06:16:35 |
| R69.htm | 54592 | 2021-08-05 06:16:35 |
| R7.htm | 44268 | 2021-08-05 06:16:35 |
| R70.htm | 41980 | 2021-08-05 06:16:35 |
| R71.htm | 41552 | 2021-08-05 06:16:35 |
| R72.htm | 31937 | 2021-08-05 06:16:35 |
| R73.htm | 37971 | 2021-08-05 06:16:35 |
| R74.htm | 77770 | 2021-08-05 06:16:35 |
| R75.htm | 29188 | 2021-08-05 06:16:35 |
| R76.htm | 18884 | 2021-08-05 06:16:35 |
| R77.htm | 103082 | 2021-08-05 06:16:35 |
| R78.htm | 103907 | 2021-08-05 06:16:35 |
| R79.htm | 52357 | 2021-08-05 06:16:35 |
| R8.htm | 162891 | 2021-08-05 06:16:35 |
| R80.htm | 34219 | 2021-08-05 06:16:35 |
| R81.htm | 104966 | 2021-08-05 06:16:35 |
| R82.htm | 43526 | 2021-08-05 06:16:35 |
| R9.htm | 157839 | 2021-08-05 06:16:35 |
| R9999.htm | 23339 | 2021-08-05 06:16:35 |
| report.css | 2768 | 2021-08-05 06:16:35 |
| Show.js | 1086 | 2021-08-05 06:16:35 |