XML 77 R49.htm IDEA: XBRL DOCUMENT v3.7.0.1
Financing Activities - Long-term Debt and ATM Program (Details)
$ / shares in Units, shares in Thousands, £ in Millions, $ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2017
USD ($)
May 31, 2017
USD ($)
Apr. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Mar. 31, 2017
GBP (£)
Feb. 28, 2015
USD ($)
Integer
Jun. 30, 2017
USD ($)
$ / shares
shares
Jun. 30, 2016
USD ($)
$ / shares
shares
Jun. 30, 2017
USD ($)
$ / shares
shares
Jun. 30, 2016
USD ($)
$ / shares
shares
At-the-Market Stock Offering Program (Numeric) [Abstract]                    
Net proceeds from issuance of common stock                 $ 177 $ 76
WPD South Wales PLC [Member] | Index Linked Senior Unsecured Notes [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount | £         £ 50          
Stated interest rate         0.01%          
Proceeds from debt, net of issuance costs | £         £ 53          
Maturity date       Mar. 14, 2029 Mar. 14, 2029          
Proceeds from debt, including premium net of debt issuance costs       $ 64            
PPL Electric [Member] | First Mortgage [Member] | Mortgage Indenture 2001 [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount   $ 475                
Stated interest rate   3.95%                
Proceeds from debt, net of issuance costs   $ 466                
Maturity date   Jun. 01, 2047                
Louisville Gas And Electric Company [Member] | Senior Debt Obligations [Member] | Environmental Facilities Revenue Refunding Bonds 2017 Series A [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount $ 60           $ 60   $ 60  
Stated interest rate 3.75%           3.75%   3.75%  
Maturity date Jun. 01, 2033                  
Repurchase date of debt instruments Jun. 01, 2027                  
Louisville Gas And Electric Company [Member] | Senior Debt Obligations [Member] | Environmental Facilities Revenue Refunding Bonds 2007 Series A [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount $ 60           $ 60   $ 60  
Maturity date Jun. 01, 2033                  
Louisville Gas And Electric Company [Member] | Senior Debt Obligations [Member] | Environmental Facilities Revenue Refunding Bonds 2007 Series A [Member] | Remarketed [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount $ 31           $ 31   $ 31  
Stated interest rate 1.25%           1.25%   1.25%  
Maturity date Jun. 01, 2033                  
Repurchase date of debt instruments Jun. 03, 2019                  
Louisville Gas And Electric Company [Member] | Senior Debt Obligations [Member] | Environmental Facilities Revenue Refunding Bonds 2007 Series B [Member] | Remarketed [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount $ 35           $ 35   $ 35  
Stated interest rate 1.25%           1.25%   1.25%  
Maturity date Jun. 01, 2033                  
Repurchase date of debt instruments Jun. 03, 2019                  
Louisville Gas And Electric Company [Member] | Senior Debt Obligations [Member] | Pollution Control Revenue Bonds, 2003 Series A [Member] | Remarketed [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount     $ 128              
Stated interest rate     1.50%              
Maturity date     Oct. 01, 2033              
Repurchase date of debt instruments     Apr. 01, 2019              
PPL Electric Utilities Corp [Member] | First Mortgage [Member] | Mortgage Indenture 2001 [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount   $ 475                
Stated interest rate   3.95%                
Proceeds from debt, net of issuance costs   $ 466                
Maturity date   Jun. 01, 2047                
Louisville Gas And Electric Co [Member] | Senior Debt Obligations [Member] | Environmental Facilities Revenue Refunding Bonds 2017 Series A [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount $ 60           $ 60   $ 60  
Stated interest rate 3.75%           3.75%   3.75%  
Maturity date Jun. 01, 2033                  
Repurchase date of debt instruments Jun. 01, 2027                  
Louisville Gas And Electric Co [Member] | Senior Debt Obligations [Member] | Environmental Facilities Revenue Refunding Bonds 2007 Series A [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount $ 60           $ 60   $ 60  
Maturity date Jun. 01, 2033                  
Louisville Gas And Electric Co [Member] | Senior Debt Obligations [Member] | Environmental Facilities Revenue Refunding Bonds 2007 Series A [Member] | Remarketed [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount $ 31           $ 31   $ 31  
Stated interest rate 1.25%           1.25%   1.25%  
Maturity date Jun. 01, 2033                  
Repurchase date of debt instruments Jun. 03, 2019                  
Louisville Gas And Electric Co [Member] | Senior Debt Obligations [Member] | Environmental Facilities Revenue Refunding Bonds 2007 Series B [Member] | Remarketed [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount $ 35           $ 35   $ 35  
Stated interest rate 1.25%           1.25%   1.25%  
Maturity date Jun. 01, 2033                  
Repurchase date of debt instruments Jun. 03, 2019                  
Louisville Gas And Electric Co [Member] | Senior Debt Obligations [Member] | Pollution Control Revenue Bonds, 2003 Series A [Member] | Remarketed [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount     $ 128              
Stated interest rate     1.50%              
Maturity date     Oct. 01, 2033              
Repurchase date of debt instruments     Apr. 01, 2019              
LG And E And KU Energy LLC [Member] | Louisville Gas And Electric Company [Member] | Senior Debt Obligations [Member] | Environmental Facilities Revenue Refunding Bonds 2017 Series A [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount $ 60           $ 60   $ 60  
Stated interest rate 3.75%           3.75%   3.75%  
Maturity date Jun. 01, 2033                  
Repurchase date of debt instruments Jun. 01, 2027                  
LG And E And KU Energy LLC [Member] | Louisville Gas And Electric Company [Member] | Senior Debt Obligations [Member] | Environmental Facilities Revenue Refunding Bonds 2007 Series A [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount $ 60           $ 60   $ 60  
Maturity date Jun. 01, 2033                  
LG And E And KU Energy LLC [Member] | Louisville Gas And Electric Company [Member] | Senior Debt Obligations [Member] | Environmental Facilities Revenue Refunding Bonds 2007 Series A [Member] | Remarketed [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount $ 31           $ 31   $ 31  
Stated interest rate 1.25%           1.25%   1.25%  
Maturity date Jun. 01, 2033                  
Repurchase date of debt instruments Jun. 03, 2019                  
LG And E And KU Energy LLC [Member] | Louisville Gas And Electric Company [Member] | Senior Debt Obligations [Member] | Environmental Facilities Revenue Refunding Bonds 2007 Series B [Member] | Remarketed [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount $ 35           $ 35   $ 35  
Stated interest rate 1.25%           1.25%   1.25%  
Maturity date Jun. 01, 2033                  
Repurchase date of debt instruments Jun. 03, 2019                  
LG And E And KU Energy LLC [Member] | Louisville Gas And Electric Company [Member] | Senior Debt Obligations [Member] | Pollution Control Revenue Bonds, 2003 Series A [Member] | Remarketed [Member]                    
Long-term Debt (Numeric) [Abstract]                    
Principal amount     $ 128              
Stated interest rate     1.50%              
Maturity date     Oct. 01, 2033              
Repurchase date of debt instruments     Apr. 01, 2019              
At The Market Stock Offering Program [Member]                    
Equity Programs [Line Items]                    
Stock Issued During Period, Shares, New Issues | shares             2,113 0 3,477 0
At-the-Market Stock Offering Program (Numeric) [Abstract]                    
Number of distribution agreements | Integer           2        
Aggregate sales price of common stock based on two separate equity distribution agreements           $ 500        
Average share price | $ / shares             $ 39.15 $ 0.00 $ 38.17 $ 0.00
Net proceeds from issuance of common stock             $ 82 $ 0 $ 132 $ 0