XML 102 R82.htm IDEA: XBRL DOCUMENT v3.23.2
Short-term Borrowings and Long-term Debt - Debt Repayments and Redemptions (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2023
Jan. 17, 2023
Long-term Debt    
Debt Instrument [Line Items]    
Aggregate Principal Amount $ 2,536  
CERC    
Debt Instrument [Line Items]    
Aggregate Principal Amount $ 2,000  
CERC | Senior Notes    
Debt Instrument [Line Items]    
Interest rate of debt (as a percent) 0.70%  
CERC | Long-term Debt    
Debt Instrument [Line Items]    
Aggregate Principal Amount $ 2,275  
CERC Term Loan 0.70%Due 2023 | CERC    
Debt Instrument [Line Items]    
Aggregate Principal Amount $ 500  
CERC Term Loan 0.70%Due 2023 | CERC | SOFR    
Debt Instrument [Line Items]    
Interest rate of debt (as a percent) 0.70%  
CERC Senior Notes 0.70% Due 2023 | CERC | Long-term Debt | Senior Notes    
Debt Instrument [Line Items]    
Aggregate Principal Amount $ 700  
Interest rate of debt (as a percent) 0.70%  
CERC Floating Rate Senior 0.5% Due 2023 | CERC | Long-term Debt | Senior Notes    
Debt Instrument [Line Items]    
Aggregate Principal Amount $ 575  
CERC Floating Rate Senior 0.5% Due 2023 | CERC | LIBOR Plus | Long-term Debt | Senior Notes    
Debt Instrument [Line Items]    
Interest rate of debt (as a percent) 0.50%  
CNP First Mortgage Bonds 4.00% Due 2044 | SIGECO | Long-term Debt | First Mortgage Bonds    
Debt Instrument [Line Items]    
Aggregate Principal Amount $ 11 $ 11
Interest rate of debt (as a percent) 4.00%  
CNP Term Loan 1.50% Due 2023    
Debt Instrument [Line Items]    
Aggregate Principal Amount $ 250  
CNP Term Loan 1.50% Due 2023 | Term Loan    
Debt Instrument [Line Items]    
Aggregate Principal Amount $ 250  
CNP Term Loan 1.50% Due 2023 | SOFR | Term Loan    
Debt Instrument [Line Items]    
Interest rate of debt (as a percent) 1.50%  
CNP First Mortgage Bonds Due 2044 | SIGECO | Long-term Debt | First Mortgage Bonds    
Debt Instrument [Line Items]    
Debt instrument, redemption price (as a percent) 100.00%  
CERC Senior Notes .70% due 2023 | CERC | SOFR | Term Loan    
Debt Instrument [Line Items]    
Adjustment to basis spread (as a percent) 0.10%  
CERC Term Loan 5.25% Due 2024 | CERC | Term Loan    
Debt Instrument [Line Items]    
Aggregate Principal Amount $ 500