Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Income (Numerator)
Income from continuing operations after income taxes		$ 481	$ 552
Less amounts allocated to participating securities		2	3
Income from continuing operations after income taxes available to PPL common shareowners - Basic		479	549
Income from continuing operations after income taxes available to PPL common shareowners - Diluted		479	549
Income (loss) from discontinued operations (net of income taxes) available to PPL common shareowners - Basic and Diluted		0	95
Net income		481	647
Less amounts allocated to participating securities		2	3
Net income available to PPL common shareowners - Basic		479	644
Net income available to PPL common shareowners - Diluted		$ 479	$ 644
Shares of Common Stock (Denominator)
Weighted-average shares - Basic EPS (in shares)		675,441	666,974
Add incremental non-participating securities:
Share-based payment awards (in shares)		3,376	1,758
Weighted-average shares - Diluted EPS (in shares)		678,817	668,732
Basic EPS - Available to PPL common shareowners:
Income from continuing operations after income taxes (in dollars per share)		$ 0.71	$ 0.83
Income (loss) from discontinued operations (net of income taxes) (in dollars per share)		0	0.14
Net Income Available to PPL common shareowners (in dollars per share)		0.71	0.97
Diluted EPS - Available to PPL common shareowners:
Income from continuing operations after income taxes (in dollars per share)		0.71	0.82
Income (loss) from discontinued operations (net of income taxes) (in dollars per share)		0	0.14
Net Income Available to PPL common shareowners (in dollars per share)		$ 0.71	$ 0.96
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	[1]	2,125	1,445
Common stock issued under DRIP (in shares)		402	419
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS		696	1,473
Performance Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS		0	146

[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.