Commitments and Contingencies (Environmental Matter and Other) (Details) wood_poles in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) wood_poles employees
Other - Labor Union Agreements (Numeric) [Abstract]
Collective Bargaining Agreement Term	3 years
Environmental Matters - European Union Creosote Ban Numeric [Abstract]
Number of poles to be replaced | wood_poles	1.4
Workforce Subject to Collective Bargaining Agreement
Other - Labor Union Agreements (Numeric) [Abstract]
Number Of Union Employees	2,173
Percentage of Total Workforce	17.00%
PPL Electric [Member] | PPL Electric Additional Sites [Member]
Environmental Matters - Superfund And Other Remediation (Numeric) [Abstract]
Environmental site accrual | $	$ 10
PPL Electric Utilities Corp [Member]
Other - Labor Union Agreements (Numeric) [Abstract]
Collective Bargaining Agreement Term	3 years
PPL Electric Utilities Corp [Member] | Workforce Subject to Collective Bargaining Agreement
Other - Labor Union Agreements (Numeric) [Abstract]
Number Of Union Employees	1,150
Percentage of Total Workforce	63.00%
PPL Electric Utilities Corp [Member] | PPL Electric Additional Sites [Member]
Environmental Matters - Superfund And Other Remediation (Numeric) [Abstract]
Environmental site accrual | $	$ 10
LG And E And KU Energy LLC [Member] | Workforce Subject to Collective Bargaining Agreement
Other - Labor Union Agreements (Numeric) [Abstract]
Number Of Union Employees	819
Percentage of Total Workforce	23.00%
LOUISVILLE GAS And ELECTRIC CO [Member]
Other - Labor Union Agreements (Numeric) [Abstract]
Collective Bargaining Agreement Term	3 years
LOUISVILLE GAS And ELECTRIC CO [Member] | Workforce Subject to Collective Bargaining Agreement
Other - Labor Union Agreements (Numeric) [Abstract]
Number Of Union Employees	696
Percentage of Total Workforce	68.00%
Kentucky Utilities Co [Member]
Other - Labor Union Agreements (Numeric) [Abstract]
Collective Bargaining Agreement Term	3 years
Kentucky Utilities Co [Member] | Workforce Subject to Collective Bargaining Agreement
Other - Labor Union Agreements (Numeric) [Abstract]
Number Of Union Employees	123
Percentage of Total Workforce	13.00%