Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income (Numerator) [Abstract]
Income from continuing operations after income taxes		$ 483	$ 250	$ 964	$ 802
Less amounts allocated to participating securities		1	1	3	2
Income from continuing operations after income taxes available to PPL common shareowners - Basic		482	249	961	800
Income from continuing operations after income taxes available to PPL common shareowners - Diluted		482	249	961	800
Income (loss) from discontinued operations (net of income taxes) available to PPL common shareowners - Basic and Diluted		0	(1,007)	0	(912)
Net income		483	(757)	964	(110)
Less amounts allocated to participating securities		1	1	3	2
Net income available to PPL common shareowners - Basic		482	(758)	961	(112)
Net income available to PPL common shareowners - Diluted		$ 482	$ (758)	$ 961	$ (112)
Shares of Common Stock (Denominator) [Abstract]
Weighted-average shares - Basic EPS (in shares)		677,145	668,415	676,293	667,698
Add incremental non-participating securities: [Abstract]
Share-based payment awards (in shares)		3,584	2,871	3,480	2,315
Weighted-average shares - Diluted EPS (in shares)		680,729	671,286	679,773	670,013
Basic EPS - Available to PPL common shareowners: [Abstract]
Income from continuing operations after income taxes (in dollars per share)		$ 0.71	$ 0.37	$ 1.42	$ 1.20
Income (loss) from discontinued operations (net of income taxes) (in dollars per share)		0.00	(1.50)	0.00	(1.37)
Net Income Available to PPL common shareowners (in dollars per share)		0.71	(1.13)	1.42	(0.17)
Diluted EPS - Available to PPL common shareowners: [Abstract]
Income from continuing operations after income taxes (in dollars per share)		0.71	0.37	1.41	1.19
Income (loss) from discontinued operations (net of income taxes) (in dollars per share)		0.00	(1.50)	0.00	(1.36)
Net Income Available to PPL common shareowners (in dollars per share)		$ 0.71	$ (1.13)	$ 1.41	$ (0.17)
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	[1]	795	992	2,920	2,437
Common stock issued under dividend reinvestment plan (in shares)		370	424	772	843
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS		696	348	696	1,085
Performance Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS		78	0	39	73

[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.