SCHEDULE I - CONDENSED UNCONSOLIDATED BALANCE SHEETS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current Assets
Cash and cash equivalents		$ 815	$ 621
Accounts Receivable [Abstract]
Other		105	107
Accounts receivable		687	663
Prepayments		79	70
Price risk management assets		147	109
Other current assets		98	63
Total Current Assets		2,767	2,432
Other Noncurrent Assets [Abstract]
Price risk management assets		149	228
Other noncurrent assets		386	192
Total Other Noncurrent Assets		6,431	6,506
Total Assets		45,680	43,396
Current Liabilities [Abstract]
Short-term debt		1,151	1,430
Long-term debt due within one year		1,172	530
Dividends		317	296
Taxes		99	110
Other current liabilities		535	551
Total Current Liabilities		4,900	4,563
Long-term Debt [Abstract]
Long-term Debt		20,721	20,069
Total Deferred Credits and Other Noncurrent Liabilities		7,068	7,107
Equity [Abstract]
Common stock	[1]	8	7
Additional paid-in capital		12,214	11,021
Earnings reinvested		5,127	4,593
Accumulated other comprehensive loss		(4,358)	(3,964)	$ (3,422)	$ (3,778)
Total Equity		12,991	11,657	10,761	9,899
Total Liabilities and Equity		$ 45,680	$ 43,396
PPL Corporation Shareowners' Common Equity Additional Information [Abstract]
Common stock par value		$ 0.01	$ 0.01
Common stock shares authorized		1,560,000	1,560,000
Common stock shares issued		767,233	720,323
Common stock shares outstanding		767,233	720,323
LG&E and KU Energy LLC Unconsolidated [Member]
Current Assets
Cash and cash equivalents		$ 0	$ 0	$ 0	$ 1
Accounts Receivable [Abstract]
Accounts receivable from affiliates		3	0
Income Taxes Receivable, Current		3	0
Notes receivable from affiliates		1,105	1,061
Total Current Assets		1,111	1,061
Investments [Abstract]
Affiliated companies at equity		5,577	5,422
Other Noncurrent Assets [Abstract]
Deferred income taxes		314	299
Total Assets		7,002	6,782
Current Liabilities [Abstract]
Notes payable to affiliates		150	177
Long-term debt due within one year		475	0
Accounts payable with affiliates		489	487
Taxes		0	11
Other current liabilities		6	6
Total Current Liabilities		1,120	681
Long-term Debt [Abstract]
Long-term debt		249	723
Notes payable to affiliates		691	650
Long-term Debt		940	1,373
Total Deferred Credits and Other Noncurrent Liabilities		0	5
Equity [Abstract]
Members Equity		4,942	4,723
Total Liabilities and Equity		$ 7,002	$ 6,782

[1] 1,560,000 shares authorized; 767,233 and 720,323 shares issued and outstanding at December 31, 2019 and December 31, 2018.