Commitments and Contingencies - Environmental Matters and Other (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($) employees	Dec. 31, 2016 USD ($)
Other - Labor Union Agreements (Numeric) [Abstract]
Number Of Union Employees | employees	1,400
Collective Bargaining Agreement Term	5 years
PPL Electric Additional Sites [Member]
Environmental Matters - Superfund and Other Remediation (Numeric) [Abstract]
Environmental site accrual | $	$ 10	$ 10
PPL Electric Utilities Corp [Member]
Other - Labor Union Agreements (Numeric) [Abstract]
Number Of Union Employees | employees	1,400
Collective Bargaining Agreement Term	5 years
PPL Electric Utilities Corp [Member] | PPL Electric Additional Sites [Member]
Environmental Matters - Superfund and Other Remediation (Numeric) [Abstract]
Environmental site accrual | $	$ 10	$ 10