XML 96 R55.htm IDEA: XBRL DOCUMENT v3.21.2
Regulatory Matters (Other Regulatory Matters) (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Feb. 28, 2021
Dec. 31, 2020
Public Utilities, General Disclosures [Line Items]              
Equity in (earnings) losses of unconsolidated affiliates   $ (22) $ 80 $ (14) $ 2,004    
Other current liabilities   2,239   2,239     $ 2,936
Asset retirement obligations   673   673     718
ACP              
Public Utilities, General Disclosures [Line Items]              
Other current liabilities   36   36     $ 936
ACP | ACP              
Public Utilities, General Disclosures [Line Items]              
Equity in (earnings) losses of unconsolidated affiliates $ 2,100            
Other current liabilities   36   36      
Other noncurrent liabilities   63   63      
ACP | ACP | Current liabilities              
Public Utilities, General Disclosures [Line Items]              
Guarantor obligations settled           $ 855  
Asset retirement obligations   $ 99   $ 99      
ACP              
Public Utilities, General Disclosures [Line Items]              
Joint owner ownership percentage   47.00%   47.00%