Earnings Per Share (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Income (Numerator)
Net income attributable to PPL shareowners	$ 316		$ 413
Less amounts allocated to participating securities	2		2
Net income available to PPL common shareowners - Basic	314		411
Plus interest charges (net of tax) related to Equity Units	9		15	[1]
Net income available to PPL common shareowners - Diluted	$ 323		$ 426
Shares of Common Stock (Denominator)
Weighted-average shares - Basic EPS (in shares)	630,749		582,640
Add incremental non-participating securities:
Share-based payment awards (in shares)	1,511		810
Equity Units (in shares)	31,679		71,990	[1]
Forward sale agreements (in shares)			1,580
Weighted-average shares - Diluted EPS (in shares)	663,939		657,020
Basic EPS - Available to PPL common shareowners:
Net Income (in dollars per share)	$ 0.50		$ 0.70
Diluted EPS - Available to PPL common shareowners:
Net Income (in dollars per share)	$ 0.49		$ 0.65
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	1,096	[2]	446	[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	2,540		6,589
Performance Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS			206
Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	123		116

[1] The If-Converted Method has been 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.