v3.26.3
Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
May 01, 2026
Apr. 29, 2026
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Basic and diluted earnings per share attributable to Clearway Energy, Inc. common stockholders            
Net income attributable to Clearway Energy, Inc.     $ 51 $ 232 $ 10 $ 259
As Previously Reported            
Basic and diluted earnings per share attributable to Clearway Energy, Inc. common stockholders            
Net income attributable to Clearway Energy, Inc.       236   273
Adjustments            
Basic and diluted earnings per share attributable to Clearway Energy, Inc. common stockholders            
Net income attributable to Clearway Energy, Inc.       (4)   (14)
Common Class A            
Basic and diluted earnings per share attributable to Clearway Energy, Inc. common stockholders            
Net income attributable to Clearway Energy, Inc.       $ 68   $ 76
Weighted average number shares outstanding - basic (in shares)     0 35,000,000 15,000,000 35,000,000
Weighted average number of shares outstanding - diluted (in shares)     0 35,000,000 15,000,000 35,000,000
Earnings per weighted average common share — basic (in dollars per share)     $ 0.42 $ 1.97 $ 0.08 $ 2.20
Earnings per weighted average common share — diluted (in dollars per share)     $ 0.42 $ 1.97 $ 0.08 $ 2.20
Common Class A | Clearway Energy, Inc.            
Basic and diluted earnings per share attributable to Clearway Energy, Inc. common stockholders            
Net income attributable to Clearway Energy, Inc.     $ 0   $ 1  
Weighted average number shares outstanding - basic (in shares)     0   15,000,000  
Weighted average number of shares outstanding - diluted (in shares)     0   15,000,000  
Earnings per weighted average common share — basic (in dollars per share)     $ 0   $ 0.08  
Earnings per weighted average common share — diluted (in dollars per share)     $ 0   $ 0.08  
Common Class A | As Previously Reported            
Basic and diluted earnings per share attributable to Clearway Energy, Inc. common stockholders            
Net income attributable to Clearway Energy, Inc.       $ 69   $ 80
Weighted average number shares outstanding - basic (in shares)       35,000,000   35,000,000
Weighted average number of shares outstanding - diluted (in shares)       35,000,000   35,000,000
Earnings per weighted average common share — basic (in dollars per share)       $ 2.00   $ 2.32
Earnings per weighted average common share — diluted (in dollars per share)       $ 2.00   $ 2.32
Common Class A | Adjustments            
Basic and diluted earnings per share attributable to Clearway Energy, Inc. common stockholders            
Net income attributable to Clearway Energy, Inc.       $ (1)   $ (4)
Weighted average number shares outstanding - basic (in shares)       0   0
Weighted average number of shares outstanding - diluted (in shares)       0   0
Earnings per weighted average common share — basic (in dollars per share)       $ (0.03)   $ (0.12)
Earnings per weighted average common share — diluted (in dollars per share)       $ (0.03)   $ (0.12)
Common Class C            
Basic and diluted earnings per share attributable to Clearway Energy, Inc. common stockholders            
Net income attributable to Clearway Energy, Inc.       $ 164   $ 183
Weighted average number shares outstanding - basic (in shares)     121,000,000 83,000,000 106,000,000 83,000,000
Weighted average number of shares outstanding - diluted (in shares)     121,000,000 83,000,000 106,000,000 83,000,000
Earnings per weighted average common share — basic (in dollars per share)     $ 0.42 $ 1.97 $ 0.08 $ 2.20
Earnings per weighted average common share — diluted (in dollars per share)     $ 0.42 $ 1.97 $ 0.08 $ 2.20
Shares converted (in shares) 1 1        
Common Class C | Clearway Energy, Inc.            
Basic and diluted earnings per share attributable to Clearway Energy, Inc. common stockholders            
Net income attributable to Clearway Energy, Inc.     $ 51   $ 9  
Weighted average number shares outstanding - basic (in shares)     121,000,000   106,000,000  
Weighted average number of shares outstanding - diluted (in shares)     121,000,000   106,000,000  
Earnings per weighted average common share — basic (in dollars per share)     $ 0.42   $ 0.08  
Earnings per weighted average common share — diluted (in dollars per share)     $ 0.42   $ 0.08  
Common Class C | As Previously Reported            
Basic and diluted earnings per share attributable to Clearway Energy, Inc. common stockholders            
Net income attributable to Clearway Energy, Inc.       $ 167   $ 193
Weighted average number shares outstanding - basic (in shares)       83,000,000   83,000,000
Weighted average number of shares outstanding - diluted (in shares)       83,000,000   83,000,000
Earnings per weighted average common share — basic (in dollars per share)       $ 2.00   $ 2.32
Earnings per weighted average common share — diluted (in dollars per share)       $ 2.00   $ 2.32
Common Class C | Adjustments            
Basic and diluted earnings per share attributable to Clearway Energy, Inc. common stockholders            
Net income attributable to Clearway Energy, Inc.       $ (3)   $ (10)
Weighted average number shares outstanding - basic (in shares)       0   0
Weighted average number of shares outstanding - diluted (in shares)       0   0
Earnings per weighted average common share — basic (in dollars per share)       $ (0.03)   $ (0.12)
Earnings per weighted average common share — diluted (in dollars per share)       $ (0.03)   $ (0.12)