Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended																12 Months Ended
		Dec. 31, 2015	[1]	Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2014	[1]	Sep. 30, 2014	[1]	Jun. 30, 2014	[1]	Mar. 31, 2014	[1]	Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Income (Numerator)
Income from continuing operations after income taxes		$ 405		$ 396		$ 250		$ 552		$ 408		$ 410		$ 230		$ 389		$ 1,603	$ 1,437		$ 1,368
Less amounts allocated to participating securities																		6	7		7
Income from continuing operations after income taxes available to PPL common shareowners - Basic																		1,597	1,430		1,361
Plus interest charges (net of tax) related to Equity Units																		0	9	[2]	44	[2]
Income from continuing operations after income taxes available to PPL common shareowners - Diluted																		1,597	1,439		1,405
Income (loss) from discontinued operations (net of income taxes) available to PPL common shareowners - Basic and Diluted		(6)		(3)		(1,007)	[3],[4]	95	[3]	287	[3],[5]	87	[3]	(1)	[3]	(73)	[3]	(921)	300		(238)
Net income		$ 399		$ 393		$ (757)	[4]	$ 647		$ 695	[5]	$ 497		$ 229		$ 316		682	1,737		1,130
Less amounts allocated to participating securities																		2	9		6
Net income available to PPL common shareowners - Basic																		680	1,728		1,124
Plus interest charges (net of tax) related to Equity Units																		0	9	[2]	44	[2]
Net income available to PPL common shareowners - Diluted																		$ 680	$ 1,737		$ 1,168
Shares of Common Stock (Denominator)
Weighted-average shares - Basic EPS (in shares)																		669,814	653,504		608,983
Add incremental non-participating securities:
Share-based payment awards (in shares)	[6]																	2,772	1,910		1,062
Equity Units (in shares)																		0	10,559	[2]	52,568	[2]
Forward sale agreements and Purchase Contracts (in shares)																		0	0		460	[6]
Weighted-average shares - Diluted EPS (in shares)																		672,586	665,973		663,073
Basic EPS - Available to PPL common shareowners:
Income from continuing operations after income taxes (in dollars per share)		$ 0.6	[7]	$ 0.59	[7]	$ 0.37	[7]	$ 0.83	[7]	$ 0.62	[7]	$ 0.61	[7]	$ 0.35	[7]	$ 0.61	[7]	$ 2.38	$ 2.19		$ 2.24
Income (loss) from discontinued operations (net of income taxes) (in dollars per share)																		(1.37)	0.45		(0.39)
Net Income (in dollars per share)		0.59	[7]	0.58	[7]	(1.13)	[7]	0.97	[7]	1.04	[7]	0.74	[7]	0.35	[7]	0.5	[7]	1.01	2.64		1.85
Diluted EPS - Available to PPL common shareowners:
Income from continuing operations after income taxes (in dollars per share)		0.6	[7]	0.59	[7]	0.37	[7]	0.82	[7]	0.62	[7]	0.61	[7]	0.34	[7]	0.61	[7]	2.37	2.16		2.12
Income (loss) from discontinued operations (net of income taxes) (in dollars per share)																		(1.36)	0.45		(0.36)
Net Income (in dollars per share)		$ 0.59	[7]	$ 0.58	[7]	$ (1.13)	[7]	$ 0.96	[7]	$ 1.04	[7]	$ 0.74	[7]	$ 0.34	[7]	$ 0.49	[7]	$ 1.01	$ 2.61		$ 1.76
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	[8]																	4,853
Common stock issued under DRIP (in shares)																		1,728
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS																		1,087	1,816		4,446
Performance Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS																		36	5		55
Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS																		0	31		29

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

[2] In 2014 and 2013, t he If-Converted Method was applied to the Equ ity Units prior to settlement . See Note 7 for additional information on the Equity Units, including the issuance of PPL common stock to settle the Purchase contracts.

[3] In the second quarter of 2015, PPL completed the spinoff of PPL Energy Supply sub stantially representing PPL's Supply segment. Accordingly, the previously reported operating results for PPL’s Supply segment have been reclassified as discontinued operations. See Note 8 to the Financial Statements for additional information.

[4] The second quarter of 2015 includes a loss of $879 million from the spinoff of PPL Energy Supply. See Note 8 to the Financial Statements for additional information.

[5] (f) The fourth quarter of 2014 includes a gain of $137 million (after-tax) from the sale of Hydroelectric generating facilities of PPL Montana. See Note 8 for additional information.

[6] The Treasury Stock Method was applied to non-participating share-based payment awards and forward sale agreement s.

[7] 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.

[8] Includes stock options exercised, vesting of performance units, vesting of restricted stock and restricted stock units and conversion of stock units granted to directors.