Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001130310-22-000023-index-headers.html | 2022-02-22 06:21:12 | |
| 0001130310-22-000023-index.html | 2022-02-22 06:21:12 | |
| 0001130310-22-000023.txt | 2022-02-22 06:21:12 | |
 0001130310-22-000023-xbrl.zip | 1241786 | 2022-02-22 06:21:12 |
| cehe_exhibit2312x12312021.htm | 2586 | 2022-02-22 06:21:12 |
| cehe_exhibit3112x12312021.htm | 11517 | 2022-02-22 06:21:12 |
| cehe_exhibit3122x12312021.htm | 11487 | 2022-02-22 06:21:12 |
| cehe_exhibit3212x12312021.htm | 5750 | 2022-02-22 06:21:12 |
| cehe_exhibit3222x12312021.htm | 5875 | 2022-02-22 06:21:12 |
| cehe_exhibit4yx12312021.htm | 154111 | 2022-02-22 06:21:12 |
| cerc_exhibit2313x12312021.htm | 3372 | 2022-02-22 06:21:12 |
| cerc_exhibit3113x12312021.htm | 10914 | 2022-02-22 06:21:12 |
| cerc_exhibit3123x12312021.htm | 11084 | 2022-02-22 06:21:12 |
| cerc_exhibit3213x12312021.htm | 5725 | 2022-02-22 06:21:12 |
| cerc_exhibit3223x12312021.htm | 5151 | 2022-02-22 06:21:12 |
| cerc_exhibit4zx12312021.htm | 144625 | 2022-02-22 06:21:12 |
| cnp-20211231.htm | 9484253 | 2022-02-22 06:21:12 |
| cnp-20211231.xsd | 159592 | 2022-02-22 06:21:12 |
| cnp-20211231_cal.xml | 196141 | 2022-02-22 06:21:12 |
| cnp-20211231_def.xml | 1312829 | 2022-02-22 06:21:12 |
| cnp-20211231_htm.xml | 9262039 | 2022-02-22 06:21:12 |
| cnp-20211231_lab.xml | 1807349 | 2022-02-22 06:21:12 |
| cnp-20211231_pre.xml | 1560244 | 2022-02-22 06:21:12 |
| cnp_exhibit21x12312021.htm | 6390 | 2022-02-22 06:21:12 |
| cnp_exhibit2311x12312021.htm | 3468 | 2022-02-22 06:21:12 |
| cnp_exhibit232x12312021.htm | 2873 | 2022-02-22 06:21:12 |
| cnp_exhibit3111x12312021.htm | 11548 | 2022-02-22 06:21:12 |
| cnp_exhibit3121x12312021.htm | 11560 | 2022-02-22 06:21:12 |
| cnp_exhibit3211x12312021.htm | 5577 | 2022-02-22 06:21:12 |
| cnp_exhibit3221x12312021.htm | 5455 | 2022-02-22 06:21:12 |
| cnp_exhibit4xx12312021.htm | 73222 | 2022-02-22 06:21:12 |
| exhibit10l12312021.htm | 58175 | 2022-02-22 06:21:12 |
| exhibit10q3.htm | 6381 | 2022-02-22 06:21:12 |
| FilingSummary.xml | 89169 | 2022-02-22 06:21:12 |
| Financial_Report.xlsx | 303673 | 2022-02-22 06:21:12 |
 image_0a.jpg | 100 | 2022-02-22 06:21:12 |
| MetaLinks.json | 1725571 | 2022-02-22 06:21:12 |
| R1.htm | 95037 | 2022-02-22 06:21:12 |
| R10.htm | 122841 | 2022-02-22 06:21:12 |
| R100.htm | 64300 | 2022-02-22 06:21:12 |
| R101.htm | 67884 | 2022-02-22 06:21:12 |
| R102.htm | 9955 | 2022-02-22 06:21:12 |
| R103.htm | 15936 | 2022-02-22 06:21:12 |
| R104.htm | 19067 | 2022-02-22 06:21:12 |
| R105.htm | 9007 | 2022-02-22 06:21:12 |
| R106.htm | 29311 | 2022-02-22 06:21:12 |
| R107.htm | 176990 | 2022-02-22 06:21:12 |
| R108.htm | 94077 | 2022-02-22 06:21:12 |
| R109.htm | 57363 | 2022-02-22 06:21:12 |
| R11.htm | 14823 | 2022-02-22 06:21:12 |
| R110.htm | 59926 | 2022-02-22 06:21:12 |
| R111.htm | 66807 | 2022-02-22 06:21:12 |
| R112.htm | 68027 | 2022-02-22 06:21:12 |
| R113.htm | 26775 | 2022-02-22 06:21:12 |
| R114.htm | 46660 | 2022-02-22 06:21:12 |
| R115.htm | 85172 | 2022-02-22 06:21:12 |
| R116.htm | 52235 | 2022-02-22 06:21:12 |
| R117.htm | 28353 | 2022-02-22 06:21:12 |
| R118.htm | 9561 | 2022-02-22 06:21:12 |
| R119.htm | 72582 | 2022-02-22 06:21:12 |
| R12.htm | 61636 | 2022-02-22 06:21:12 |
| R120.htm | 28549 | 2022-02-22 06:21:12 |
| R121.htm | 17436 | 2022-02-22 06:21:12 |
| R122.htm | 93612 | 2022-02-22 06:21:12 |
| R123.htm | 91672 | 2022-02-22 06:21:12 |
| R124.htm | 18120 | 2022-02-22 06:21:12 |
| R125.htm | 44270 | 2022-02-22 06:21:12 |
| R126.htm | 59073 | 2022-02-22 06:21:12 |
| R127.htm | 13255 | 2022-02-22 06:21:12 |
| R128.htm | 9140 | 2022-02-22 06:21:12 |
| R129.htm | 14271 | 2022-02-22 06:21:12 |
| R13.htm | 30464 | 2022-02-22 06:21:12 |
| R130.htm | 21576 | 2022-02-22 06:21:12 |
| R131.htm | 137771 | 2022-02-22 06:21:12 |
| R132.htm | 8189 | 2022-02-22 06:21:12 |
| R14.htm | 7656 | 2022-02-22 06:21:12 |
| R15.htm | 130501 | 2022-02-22 06:21:12 |
| R16.htm | 21264 | 2022-02-22 06:21:12 |
| R17.htm | 95272 | 2022-02-22 06:21:12 |
| R18.htm | 47467 | 2022-02-22 06:21:12 |
| R19.htm | 80359 | 2022-02-22 06:21:12 |
| R2.htm | 12225 | 2022-02-22 06:21:12 |
| R20.htm | 7510 | 2022-02-22 06:21:12 |
| R21.htm | 28074 | 2022-02-22 06:21:12 |
| R22.htm | 5555 | 2022-02-22 06:21:12 |
| R23.htm | 153620 | 2022-02-22 06:21:12 |
| R24.htm | 7117 | 2022-02-22 06:21:12 |
| R25.htm | 103922 | 2022-02-22 06:21:12 |
| R26.htm | 76272 | 2022-02-22 06:21:12 |
| R27.htm | 12173 | 2022-02-22 06:21:12 |
| R28.htm | 61079 | 2022-02-22 06:21:12 |
| R29.htm | 115906 | 2022-02-22 06:21:12 |
| R3.htm | 124891 | 2022-02-22 06:21:12 |
| R30.htm | 223333 | 2022-02-22 06:21:12 |
| R31.htm | 118636 | 2022-02-22 06:21:12 |
| R32.htm | 69095 | 2022-02-22 06:21:12 |
| R33.htm | 156616 | 2022-02-22 06:21:12 |
| R34.htm | 551530 | 2022-02-22 06:21:12 |
| R35.htm | 61837 | 2022-02-22 06:21:12 |
| R36.htm | 130860 | 2022-02-22 06:21:12 |
| R37.htm | 82215 | 2022-02-22 06:21:12 |
| R38.htm | 88702 | 2022-02-22 06:21:12 |
| R39.htm | 123500 | 2022-02-22 06:21:12 |
| R4.htm | 7280 | 2022-02-22 06:21:12 |
| R40.htm | 219534 | 2022-02-22 06:21:12 |
| R41.htm | 254981 | 2022-02-22 06:21:12 |
| R42.htm | 66510 | 2022-02-22 06:21:12 |
| R43.htm | 58478 | 2022-02-22 06:21:12 |
| R44.htm | 159271 | 2022-02-22 06:21:12 |
| R45.htm | 70173 | 2022-02-22 06:21:12 |
| R46.htm | 59480 | 2022-02-22 06:21:12 |
| R47.htm | 132324 | 2022-02-22 06:21:12 |
| R48.htm | 6185 | 2022-02-22 06:21:12 |
| R49.htm | 110224 | 2022-02-22 06:21:12 |
| R5.htm | 39226 | 2022-02-22 06:21:12 |
| R50.htm | 34282 | 2022-02-22 06:21:12 |
| R51.htm | 117258 | 2022-02-22 06:21:12 |
| R52.htm | 201920 | 2022-02-22 06:21:12 |
| R53.htm | 113734 | 2022-02-22 06:21:12 |
| R54.htm | 69820 | 2022-02-22 06:21:12 |
| R55.htm | 139934 | 2022-02-22 06:21:12 |
| R56.htm | 605561 | 2022-02-22 06:21:12 |
| R57.htm | 60223 | 2022-02-22 06:21:12 |
| R58.htm | 119078 | 2022-02-22 06:21:12 |
| R59.htm | 75841 | 2022-02-22 06:21:12 |
| R6.htm | 14008 | 2022-02-22 06:21:12 |
| R60.htm | 85521 | 2022-02-22 06:21:12 |
| R61.htm | 119593 | 2022-02-22 06:21:12 |
| R62.htm | 210641 | 2022-02-22 06:21:12 |
| R63.htm | 255656 | 2022-02-22 06:21:12 |
| R64.htm | 28469 | 2022-02-22 06:21:12 |
| R65.htm | 51754 | 2022-02-22 06:21:12 |
| R66.htm | 149084 | 2022-02-22 06:21:12 |
| R67.htm | 68799 | 2022-02-22 06:21:12 |
| R68.htm | 57547 | 2022-02-22 06:21:12 |
| R69.htm | 133019 | 2022-02-22 06:21:12 |
| R7.htm | 163440 | 2022-02-22 06:21:12 |
| R70.htm | 10087 | 2022-02-22 06:21:12 |
| R71.htm | 24739 | 2022-02-22 06:21:12 |
| R72.htm | 97037 | 2022-02-22 06:21:12 |
| R73.htm | 23690 | 2022-02-22 06:21:12 |
| R74.htm | 65078 | 2022-02-22 06:21:12 |
| R75.htm | 15833 | 2022-02-22 06:21:12 |
| R76.htm | 66501 | 2022-02-22 06:21:12 |
| R77.htm | 166914 | 2022-02-22 06:21:12 |
| R78.htm | 31798 | 2022-02-22 06:21:12 |
| R79.htm | 35326 | 2022-02-22 06:21:12 |
| R8.htm | 37679 | 2022-02-22 06:21:12 |
| R80.htm | 36635 | 2022-02-22 06:21:12 |
| R81.htm | 16634 | 2022-02-22 06:21:12 |
| R82.htm | 6626 | 2022-02-22 06:21:12 |
| R83.htm | 84456 | 2022-02-22 06:21:12 |
| R84.htm | 148505 | 2022-02-22 06:21:12 |
| R85.htm | 8914 | 2022-02-22 06:21:12 |
| R86.htm | 53266 | 2022-02-22 06:21:12 |
| R87.htm | 68930 | 2022-02-22 06:21:12 |
| R88.htm | 234435 | 2022-02-22 06:21:12 |
| R89.htm | 268452 | 2022-02-22 06:21:12 |
| R9.htm | 121668 | 2022-02-22 06:21:12 |
| R90.htm | 66627 | 2022-02-22 06:21:12 |
| R91.htm | 7689 | 2022-02-22 06:21:12 |
| R92.htm | 44650 | 2022-02-22 06:21:12 |
| R93.htm | 57077 | 2022-02-22 06:21:12 |
| R94.htm | 34478 | 2022-02-22 06:21:12 |
| R95.htm | 15024 | 2022-02-22 06:21:12 |
| R96.htm | 25739 | 2022-02-22 06:21:12 |
| R97.htm | 20882 | 2022-02-22 06:21:12 |
| R98.htm | 20175 | 2022-02-22 06:21:12 |
| R99.htm | 49838 | 2022-02-22 06:21:12 |
| report.css | 2768 | 2022-02-22 06:21:12 |
| Show.js | 1086 | 2022-02-22 06:21:12 |