Earnings Per Share (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Income (Numerator)
Income from continuing operations after income taxes attributable to PPL shareowners																	$ 1,128		$ 1,532		$ 1,493
Less amounts allocated to participating securities																	6		8		6
Less issuance costs on subsidiary's preferred securities redeemed																			6
Income from continuing operations after income taxes available to PPL common shareowners - Basic																	1,122		1,518		1,487
Plus interest charges (net of tax) related to Equity Units																	44
Income from continuing operations after income taxes available to PPL common shareowners - Diluted																	1,166		1,518		1,487
Income (loss) from discontinued operations (net of income taxes) available to PPL common shareowners - Basic and Diluted			1	[1]	1	[1]							(6)	[1]			2		(6)		2
Net income attributable to PPL shareowners	(98)	[1],[2]	410	[1]	405	[1]	413	[1]	359	[1]	355	[1]	271	[1]	541	[1]	1,130		1,526		1,495
Less amounts allocated to participating securities																	6		8		6
Less issuance costs on subsidiary's preferred securities redeemed																			6
Net income available to PPL common shareowners - Basic																	1,124		1,512		1,489
Plus interest charges (net of tax) related to Equity Units																	44
Net income available to PPL common shareowners - Diluted																	$ 1,168		$ 1,512		$ 1,489
Shares of Common Stock (Denominator)
Weighted-average shares - Basic EPS (in shares)																	608,983		580,276		550,395
Add incremental non-participating securities:
Share-based payment awards (in shares)																	1,062	[3]	563	[3]	400	[3]
Equity Units (in shares)																	52,568	[4]
Forward sale agreements and Purchase Contracts (in shares)																	460	[3]	787	[3]	157	[3]
Weighted-average shares - Diluted EPS (in shares)																	663,073		581,626		550,952
Basic EPS - Available to PPL common shareowners:
Income from continuing operations after income taxes (in dollars per share)	$ (0.16)	[1],[2],[5]	$ 0.65	[1],[5]	$ 0.68	[1],[5]	$ 0.70	[1],[5]	$ 0.61	[1],[5]	$ 0.61	[1],[5]	$ 0.47	[1],[5]	$ 0.93	[1],[5]	$ 1.85		$ 2.62		$ 2.70
Income (loss) from discontinued operations (net of income taxes) (in dollars per share)																			$ (0.01)		$ 0.01
Net Income (in dollars per share)	$ (0.16)	[1],[2],[5]	$ 0.65	[1],[5]	$ 0.68	[1],[5]	$ 0.70	[1],[5]	$ 0.61	[1],[5]	$ 0.61	[1],[5]	$ 0.46	[1],[5]	$ 0.93	[1],[5]	$ 1.85		$ 2.61		$ 2.71
Diluted EPS - Available to PPL common shareowners:
Income from continuing operations after income taxes (in dollars per share)	$ (0.16)	[1],[2],[5],[6]	$ 0.62	[1],[5],[6]	$ 0.63	[1],[5],[6]	$ 0.65	[1],[5],[6]	$ 0.60	[1],[5]	$ 0.61	[1],[5]	$ 0.47	[1],[5]	$ 0.93	[1],[5]	$ 1.76		$ 2.61		$ 2.70
Income (loss) from discontinued operations (net of income taxes) (in dollars per share)																			$ (0.01)
Net Income (in dollars per share)	$ (0.16)	[1],[2],[5],[6]	$ 0.62	[1],[5],[6]	$ 0.63	[1],[5],[6]	$ 0.65	[1],[5],[6]	$ 0.60	[1],[5]	$ 0.61	[1],[5]	$ 0.46	[1],[5]	$ 0.93	[1],[5]	$ 1.76		$ 2.60		$ 2.70
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)																	1,552	[7]
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																	4,446		5,293		5,084
Performance Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS																	55		58		2
Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS																	29

[1] Quarterly results can vary depending on, among other things, weather and the forward pricing of power. Accordingly, comparisons among quarters of a year may not be indicative of overall trends and changes in operations.

[2] Fourth quarter of 2013 includes a charge for the termination of the lease of the Colstrip coal-fired electric generating facility in Montana. See Note 8 to the Financial Statements for additional information.

[3] The Treasury Stock Method was applied to non-participating share-based payment awards, forward sale agreements and the 2010 Purchase Contracts for 2012 and 2011

[4] In 2013, the If-Converted Method was applied to the Equity Units prior to settlement.

[5] The sum of the quarterly amounts may not equal annual earnings per share due to changes in the number of common shares outstanding during the year or rounding.

[6] As a result of a reported loss, diluted earnings per share for the three months ended December 31, 2013 exclude incremental shares as they were anti-dilutive.

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