Quarterly report pursuant to Section 13 or 15(d)

Equity Method Investments - Summary of Consolidated Financial Position and Results of Operations of Significant Entities, Accounted for Using Equity Method (Details)

v3.19.1
Equity Method Investments - Summary of Consolidated Financial Position and Results of Operations of Significant Entities, Accounted for Using Equity Method (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Balance Sheet    
Current assets $ 252 $ 134
Total assets 4,008 3,180
Current liabilities 128 71
Total liabilities 1,072 330
Members’ equity 2,936 2,850
Income Statement    
Revenue 262 266
Income from continuing operations (28) (57)
Net income (28) (57)
Buckeye Wind Energy Class B Holdings, LLC [Member]    
Balance Sheet    
Current assets 4 3
Total assets 276 286
Current liabilities 1 1
Total liabilities 12 11
Members’ equity 264 275
Income Statement    
Revenue 14 12
Income from continuing operations (6) (8)
Net income (6) (8)
Other Investments [Member]    
Balance Sheet    
Current assets 248 131
Total assets 3,732 2,894
Current liabilities 127 70
Total liabilities 1,060 319
Members’ equity 2,672 2,575
Income Statement    
Revenue 248 254
Income from continuing operations (22) (49)
Net income $ (22) $ (49)