SCHEDULE I - CONDENSED UNCONSOLIDATED BALANCE SHEETS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current Assets
Cash and cash equivalents		$ 621	$ 485
Accounts Receivable [Abstract]
Other		107	100
Accounts receivable		663	681
Prepayments		70	66
Price risk management assets		109	49
Other current assets		63	50
Total Current Assets		2,432	2,294
Other Noncurrent Assets [Abstract]
Price risk management assets		228	215
Other noncurrent assets		192	135
Total Other Noncurrent Assets		6,506	6,093
Total Assets		43,396	41,479
Current Liabilities [Abstract]
Short-term debt		1,430	1,080
Long-term debt due within one year		530	348
Dividends		296	273
Taxes		110	105
Other current liabilities		551	624
Total Current Liabilities		4,563	4,023
Long-term Debt [Abstract]
Total Long-term Debt		20,069	19,847
Total Deferred Credits and Other Noncurrent Liabilities		7,107	6,848
Equity [Abstract]
Common stock	[1]	7	7
Additional paid-in capital		11,021	10,305
Earnings reinvested		4,593	3,871
Accumulated other comprehensive loss		(3,964)	(3,422)	$ (3,778)	$ (2,728)
Total Equity		11,657	10,761	9,899	9,919
Total Liabilities and Equity		$ 43,396	$ 41,479
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		720,323	693,398
Common stock shares outstanding		720,323	693,398
LG&E and KU Energy LLC Unconsolidated [Member]
Current Assets
Cash and cash equivalents		$ 0	$ 0	$ 1	$ 0
Accounts Receivable [Abstract]
Accounts receivable		0	1
Accounts receivable from affiliates		0	8
Income Taxes Receivable, Current		0	1
Notes receivable from affiliates		1,061	1,035
Total Current Assets		1,061	1,045
Investments [Abstract]
Affiliated companies at equity		5,422	5,209
Other Noncurrent Assets [Abstract]
Deferred income taxes		299	263
Total Assets		6,782	6,517
Current Liabilities [Abstract]
Notes payable to affiliates		177	241
Accounts payable with affiliates		487	469
Taxes		11	35
Other current liabilities		6	5
Total Current Liabilities		681	750
Long-term Debt [Abstract]
Long-term debt		723	722
Notes payable to affiliates		650	476
Total Long-term Debt		1,373	1,198
Total Deferred Credits and Other Noncurrent Liabilities		5	6
Equity [Abstract]
Members Equity		4,723	4,563
Total Liabilities and Equity		$ 6,782	$ 6,517

[1] 1,560,000 shares authorized; 720,323 and 693,398 shares issued and outstanding at December 31, 2018 and December 31, 2017.