Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income (Numerator)
Net income	$ (1,480)	$ 1,469	$ 1,746
Less amounts allocated to participating securities	0	1	1
Net Income (Loss) Available to Common Stockholders, Basic	(1,480)	1,468	1,745
Net Income (Loss) from Continuing Operations Available to Common Shareholders, Diluted	18	639	735
Net income available to PPL common shareowners - Basic	18	639	735
Net income available to PPL common shareowners - Diluted	$ (1,480)	$ 1,468	$ 1,745
Shares of Common Stock (Denominator)
Weighted-average shares - Basic EPS (in shares)	762,902	768,590	728,512
Add incremental non-participating securities:
Share-based payment awards (in shares)	1,917	794	1,101
Forward sales agreements	0	0	7,141
Weighted-average shares - Diluted EPS (in shares)	764,819	769,384	736,754
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.03	$ 0.83	$ 1.01
Income (Loss) from Discontinued Operations (Net of tax)	(1.96)	1.08	1.38
Basic EPS - Available to PPL common shareowners:
Net Income (Loss)	(1.93)	1.91	2.39
Income (Loss) from Continuing Operations, Per Diluted Share	0.03	0.83	1.00
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	(1.96)		1.37
Diluted EPS - Available to PPL common shareowners:
Net Income (in dollars per share)	$ (1.93)	$ 1.91	$ 2.37
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock issued under DRIP (in shares)	0	943
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	983	731
Income (Loss) from Continuing Operations After Income Taxes	$ 18	$ 640	$ 736
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	1,783	452	8