Earnings Per Share (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Income (Numerator)
Income from continuing operations after income taxes attributable to PPL shareowners	$ 490		$ 403		$ 1,032		$ 1,198
Less amounts allocated to participating securities	2		2		5		6
Income from continuing operations after income taxes available to PPL shareowners - Basic	488		401		1,027		1,192
Plus interest charges (net of tax) related to Equity Units	0		7	[1]	9	[1]	37	[1]
Income from continuing operations after income taxes available to PPL shareowners - Diluted	488		408		1,036		1,229
Income (loss) from discontinued operations (net of income taxes) available to PPL common shareowners - Basic and Diluted	7		7		10		30
Net income attributable to PPL shareowners	497		410		1,042		1,228
Less amounts allocated to participating securities	2		2		5		6
Net income available to PPL common shareowners - Basic	495		408		1,037		1,222
Plus interest charges (net of tax) related to Equity Units	0		7	[1]	9	[1]	37	[1]
Net income available to PPL common shareowners - Diluted	$ 495		$ 415		$ 1,046		$ 1,259
Shares of Common Stock (Denominator)
Weighted-average shares - Basic EPS (in shares)	664,432		631,046		649,561		601,275
Add incremental non-participating securities:
Share-based payment awards (in shares)	1,970		1,163		1,860		1,035
Equity Units (in shares)	0		32,134	[1]	14,080	[1]	59,171	[1]
Forward sale agreements (in shares)	0		0		0		613
Weighted-average shares - Diluted EPS (in shares)	666,402		664,343		665,501		662,094
Basic EPS - Available to PPL common shareowners:
Income from continuing operations after income taxes (in dollars per share)	$ 0.73		$ 0.64		$ 1.58		$ 1.98
Income (loss) from discontinued operations (net of income taxes) (in dollars per share)	$ 0.01		$ 0.01		$ 0.02		$ 0.05
Net Income (in dollars per share)	$ 0.74		$ 0.65		$ 1.6		$ 2.03
Diluted EPS - Available to PPL common shareowners:
Income from continuing operations after income taxes (in dollars per share)	$ 0.73		$ 0.61		$ 1.56		$ 1.86
Income (loss) from discontinued operations (net of income taxes) (in dollars per share)	$ 0.01		$ 0.01		$ 0.01		$ 0.04
Net Income (in dollars per share)	$ 0.74		$ 0.62		$ 1.57		$ 1.9
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	210	[2]	85	[2]	2,228	[2]	1,469	[2]
Common stock issued under ESOP (in shares)	0		0		0		275
Common stock issued under DRIP (in shares)	425		0		425		549
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	527		1,136		1,901		4,793
Performance Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	0		1		0		73
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		41		39

[1] The If-Converted Method was applied to the Equity Units prior to settlement. See Note 7 for additional information on the 2011 Equity Units, including the issuance of PPL common stock on May 1, 2014 to settle the 2011 Purchase Contracts.

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