Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income (Numerator) [Abstract]
Income from continuing operations after income taxes		$ 473	$ 396	$ 1,437	$ 1,198
Less amounts allocated to participating securities		1	2	4	5
Income from continuing operations after income taxes available to PPL common shareowners - Basic		472	394	1,433	1,193
Income from continuing operations after income taxes available to PPL common shareowners - Diluted		472	394	1,433	1,193
Income (loss) from discontinued operations (net of income taxes) available to PPL common shareowners - Basic and Diluted		0	(3)	0	(915)
Net income		473	393	1,437	283
Less amounts allocated to participating securities		1	2	4	1
Net income available to PPL common shareowners - Basic		472	391	1,433	282
Net income available to PPL common shareowners - Diluted		$ 472	$ 391	$ 1,433	$ 282
Shares of Common Stock (Denominator) [Abstract]
Weighted-average shares - Basic EPS (in shares)		678,114	670,763	676,905	668,731
Add incremental non-participating securities: [Abstract]
Share-based payment awards (in shares)		2,234	2,939	3,064	2,523
Weighted-average shares - Diluted EPS (in shares)		680,348	673,702	679,969	671,254
Basic EPS - Available to PPL common shareowners: [Abstract]
Income from continuing operations after income taxes (in dollars per share)		$ 0.70	$ 0.59	$ 2.12	$ 1.78
Income (loss) from discontinued operations (net of income taxes) (in dollars per share)		0.00	(0.01)	0.00	(1.36)
Net Income Available to PPL common shareowners (in dollars per share)		0.70	0.58	2.12	0.42
Diluted EPS - Available to PPL common shareowners: [Abstract]
Income from continuing operations after income taxes (in dollars per share)		0.69	0.59	2.11	1.78
Income (loss) from discontinued operations (net of income taxes) (in dollars per share)		0.00	(0.01)	0.00	(1.36)
Net Income Available to PPL common shareowners (in dollars per share)		$ 0.69	$ 0.58	$ 2.11	$ 0.42
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	[1]	248	1,368	3,168	3,805
Common stock issued under dividend reinvestment plan (in shares)		761	475	1,533	1,318
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS		696	1,484	696	1,218
Performance Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS		316	0	210	49

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