XML 48 R68.htm IDEA: XBRL DOCUMENT v3.19.3
Regulatory and Rate Matters - Application For a New 345 KV Transmission Line and Western Spirit Line (Details)
$ in Millions
Oct. 02, 2019
MW
Jun. 03, 2019
MW
May 01, 2019
USD ($)
kv
Aug. 10, 2018
USD ($)
kv
MW
Mar. 21, 2018
MW
KV Transmission Line          
Public Utilities, General Disclosures [Line Items]          
Transmission line and associated facilities generation capacity (in kilovolts) | kv       345  
Solar generation capacity (in megawatts) | MW       166  
Estimated cost of project | $       $ 85.0  
Facebook Data Center          
Public Utilities, General Disclosures [Line Items]          
Estimated cost of project | $       $ 39.0  
Estimated cost of project, percentage       46.00%  
Facebook Data Center | Avangrid Renewables, LLC          
Public Utilities, General Disclosures [Line Items]          
Solar generation capacity (in megawatts) | MW         166
Western Spirit Line          
Public Utilities, General Disclosures [Line Items]          
Transmission line and associated facilities generation capacity (in kilovolts) | kv     345    
Estimated cost of project | $     $ 285.0    
Estimated self-fund amount under agreement | $     $ 75.0    
La Joya Wind | KV Transmission Line          
Public Utilities, General Disclosures [Line Items]          
Solar generation capacity (in megawatts) | MW   140   140  
Subsequent event | La Joya Wind | KV Transmission Line          
Public Utilities, General Disclosures [Line Items]          
Solar generation capacity (in megawatts) | MW 140