Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended																12 Months Ended
		Dec. 31, 2016	[1]	Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	[1]	Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income (Numerator)
Income from continuing operations after income taxes										$ 405		$ 396		$ 250		$ 552		$ 1,902	$ 1,603	$ 1,437
Less amounts allocated to participating securities																		6	6	7
Income from continuing operations after income taxes available to PPL common shareowners - Basic																		1,896	1,597	1,430
Plus interest charges (net of tax) related to Equity Units																		0	0	9	[2]
Income from continuing operations after income taxes available to PPL common shareowners - Diluted																		1,896	1,597	1,439
Income (loss) from discontinued operations (net of income taxes) available to PPL common shareowners - Basic and Diluted										(6)	[3],[4]	(3)	[3],[4]	(1,007)	[3],[4]	95	[3],[4]	0	(921)	300
Net income		$ 465		$ 473		$ 483		$ 481		$ 399		$ 393		$ (757)	[5]	$ 647		1,902	682	1,737
Less amounts allocated to participating securities																		6	2	9
Net income available to PPL common shareowners - Basic																		1,896	680	1,728
Plus interest charges (net of tax) related to Equity Units																		0	0	9	[2]
Net income available to PPL common shareowners - Diluted																		$ 1,896	$ 680	$ 1,737
Shares of Common Stock (Denominator)
Weighted-average shares - Basic EPS (in shares)																		677,592	669,814	653,504
Add incremental non-participating securities:
Share-based payment awards (in shares)	[6]																	2,854	2,772	1,910
Equity Units (in shares)																		0	0	10,559	[2]
Weighted-average shares - Diluted EPS (in shares)																		680,446	672,586	665,973
Basic EPS - Available to PPL common shareowners:
Income from continuing operations after income taxes (in dollars per share)										$ 0.60	[7]	$ 0.59	[7]	$ 0.37	[7]	$ 0.83	[7]	$ 2.80	$ 2.38	$ 2.19
Income (loss) from discontinued operations (net of income taxes) (in dollars per share)																		0.00	(1.37)	0.45
Net Income (in dollars per share)		$ 0.68	[7]	$ 0.70	[7]	$ 0.71	[7]	$ 0.71	[7]	0.59	[7]	0.58	[7]	(1.13)	[7]	0.97	[7]	2.80	1.01	2.64
Diluted EPS - Available to PPL common shareowners:
Income from continuing operations after income taxes (in dollars per share)										0.60	[7]	0.59	[7]	0.37	[7]	0.82	[7]	2.79	2.37	2.16
Income (loss) from discontinued operations (net of income taxes) (in dollars per share)																		0.00	(1.36)	0.45
Net Income (in dollars per share)		$ 0.68	[7]	$ 0.69	[7]	$ 0.71	[7]	$ 0.71	[7]	$ 0.59	[7]	$ 0.58	[7]	$ (1.13)	[7]	$ 0.96	[7]	$ 2.79	$ 1.01	$ 2.61
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	[8]																	3,224
Common stock issued under DRIP (in shares)																		1,562
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS																		696	1,087	1,816
Performance Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS																		176	36	5
Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS																		0	0	31

[1] 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.

[2] In 2014, the If-Converted Method was applied to the Equity 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 substantially 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] 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.

[5] 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.

[6] The Treasury Stock Method was applied to non-participating share-based payment awards.

[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.