XML 141 R125.htm IDEA: XBRL DOCUMENT v3.10.0.1
Investments Accounted for by the Equity Method and Variable Interest Entities - Other Equity Investments (Details)
$ in Millions
Dec. 31, 2018
USD ($)
MW
Dec. 31, 2017
USD ($)
Schedule of Equity Method Investments [Line Items]    
Generation capacity (in MW) | MW 23,000  
Equity investments in affiliates $ 412 $ 182
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract]    
Current assets 3 6
Net property, plant and equipment 76 80
Other long-term assets 28 36
Total assets 107 122
Current liabilities 2 3
Long-term debt 29 30
Other long-term liabilities 7 7
Total liabilities 38 40
Redeemable noncontrolling interests 19 19
Net assets less noncontrolling interests $ 50 $ 63
Gladstone    
Schedule of Equity Method Investments [Line Items]    
Ownership percentage 37.50%  
Generation capacity (in MW) | MW 1,613  
Equity investments in affiliates $ 140