Earnings Per Share (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Income (Numerator)
Income from continuing operations after income taxes attributable to PPL shareowners	$ 647		$ 324
Less amounts allocated to participating securities	3		2
Income from continuing operations after income taxes available to PPL shareowners - Basic	644		322
Plus interest charges (net of tax) related to Equity Units	0		9	[1]
Income from continuing operations after income taxes available to PPL shareowners - Diluted	644		331
Income (loss) from discontinued operations (net of income taxes) available to PPL common shareowners - Basic and Diluted	0		(8)
Net income attributable to PPL shareowners	647		316
Less amounts allocated to participating securities	3		2
Net income available to PPL common shareowners - Basic	644		314
Plus interest charges (net of tax) related to Equity Units	0		9	[1]
Net income available to PPL common shareowners - Diluted	$ 644		$ 323
Shares of Common Stock (Denominator)
Weighted-average shares - Basic EPS (in shares)	666,974		630,749
Add incremental non-participating securities:
Share-based payment awards (in shares)	1,758		1,511
Equity Units (in shares)	0		31,679	[1]
Weighted-average shares - Diluted EPS (in shares)	668,732		663,939
Basic EPS - Available to PPL common shareowners:
Income from continuing operations after income taxes (in dollars per share)	$ 0.97		$ 0.51
Income (loss) from discontinued operations (net of income taxes) (in dollars per share)	$ 0		$ (0.01)
Net Income (in dollars per share)	$ 0.97		$ 0.5
Diluted EPS - Available to PPL common shareowners:
Income from continuing operations after income taxes (in dollars per share)	$ 0.96		$ 0.5
Income (loss) from discontinued operations (net of income taxes) (in dollars per share)	$ 0		$ (0.01)
Net Income (in dollars per share)	$ 0.96		$ 0.49
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	1,445	[2]	1,096	[2]
Common stock issued under DRIP (in shares)	419		0
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	1,473		2,540
Performance Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	146		0
Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	0		123

[1] In 2014, the If-Converted Method was applied to the Equity Units prior to the March 2014 settlement.

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