Earnings Per Share (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Income (Numerator)
Income from continuing operations after income taxes attributable to PPL shareowners	$ 229		$ 404		$ 545		$ 817
Less amounts allocated to participating securities	1		2		3		4
Income from continuing operations after income taxes available to PPL shareowners - Basic	228		402		542		813
Plus interest charges (net of tax) related to Equity Units			15	[1]	9	[1]	30	[1]
Income from continuing operations after income taxes available to PPL shareowners - Diluted	228		417		551		843
Income (loss) from discontinued operations (net of income taxes) available to PPL common shareowners - Basic and Diluted			1				1
Net income attributable to PPL shareowners	229		405		545		818
Less amounts allocated to participating securities	1		2		3		4
Net income available to PPL common shareowners - Basic	228		403		542		814
Plus interest charges (net of tax) related to Equity Units			15	[1]	9	[1]	30	[1]
Net income available to PPL common shareowners - Diluted	$ 228		$ 418		$ 551		$ 844
Shares of Common Stock (Denominator)
Weighted-average shares - Basic EPS (in shares)	653,132		589,834		642,002		586,683
Add incremental non-participating securities:
Share-based payment awards (in shares)	2,100		1,133		1,806		971
Equity Units (in shares)	10,560	[1]	73,388	[1]	21,119	[1]	72,689	[1]
Forward sale agreements (in shares)			260				920
Weighted-average shares - Diluted EPS (in shares)	665,792		664,615		664,927		661,263
Basic EPS - Available to PPL common shareowners:
Income from continuing operations after income taxes (in dollars per share)	$ 0.35		$ 0.68		$ 0.84		$ 1.39
Net Income (in dollars per share)	$ 0.35		$ 0.68		$ 0.84		$ 1.39
Diluted EPS - Available to PPL common shareowners:
Income from continuing operations after income taxes (in dollars per share)	$ 0.34		$ 0.63		$ 0.83		$ 1.28
Net Income (in dollars per share)	$ 0.34		$ 0.63		$ 0.83		$ 1.28
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	922	[2]	938	[2]	2,018	[2]	1,384	[2]
Common stock issued under ESOP (in shares)							275
Common stock issued under DRIP (in shares)							549
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	790		2,192		2,060		5,486
Performance Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	1		5		1		108
Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS					61		58

[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.