Financing Activities (Distributions and Capital Contributions) (Details) - USD ($) $ / shares in Units, $ in Billions	1 Months Ended			3 Months Ended																12 Months Ended
	Feb. 28, 2017	Nov. 30, 2016	Nov. 30, 2015	Dec. 31, 2016		Sep. 30, 2016	[1],[2]	Jun. 30, 2016	[1],[2]	Mar. 31, 2016	[1],[2]	Dec. 31, 2015	[2],[3]	Sep. 30, 2015	[2],[3]	Jun. 30, 2015	[2],[3]	Mar. 31, 2015	[2],[3]	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Distributions [Line Items]
Dividend payable date of quarterly common stock dividend			Jan. 03, 2017
Current quarterly common stock dividend (in dollars per share)		$ 0.38		$ 0.38	[1],[2]	$ 0.38		$ 0.38		$ 0.38		$ 0.3775		$ 0.3775		$ 0.3725		$ 0.3725		$ 1.52	$ 1.50	$ 1.49
Annualized current quarterly common stock dividend (in dollars per share)			$ 1.52
Restricted net assets at end of period				$ 2.7																$ 2.7
Unrestricted assets at the end of period				3.1																$ 3.1
Minimum adjusted equity to total capitalization in order to pay dividends																				30.00%
Subsequent Event [Member]
Distributions [Line Items]
Current quarterly common stock dividend (in dollars per share)	$ 0.395
Annualized current quarterly common stock dividend (in dollars per share)	$ 1.58
LG And E And KU Energy LLC [Member]
Distributions [Line Items]
Restricted net assets at end of period				2.7																$ 2.7
Unrestricted assets at the end of period				3.1																$ 3.1
Minimum adjusted equity to total capitalization in order to pay dividends																				30.00%
Louisville Gas And Electric Co [Member]
Distributions [Line Items]
Restricted net assets at end of period				1.1																$ 1.1
Unrestricted assets at the end of period				1.4																$ 1.4
Minimum adjusted equity to total capitalization in order to pay dividends																				30.00%
Kentucky Utilities Co [Member]
Distributions [Line Items]
Restricted net assets at end of period				1.6																$ 1.6
Unrestricted assets at the end of period				$ 1.7																$ 1.7
Minimum adjusted equity to total capitalization in order to pay dividends																				30.00%

[1] PPL has paid quarterly cash dividends on its common stock in every year since 1946. Future dividends, declared at the discretion of the Board of Directors, will be dependent upon future earnings, cash flows, financial requirements and other factors.

[2] Quarterly results can vary depending on, among other things, weather. Accordingly, comparisons among quarters of a year may not be indicative of overall trends and changes in operations.

[3] The sum of the quarterly amounts may not equal annual earnings per share due to changes in the number of common shares outstanding during the year or rounding.