SCHEDULE I - CONDENSED UNCONSOLIDATED BALANCE SHEETS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current Assets
Cash and cash equivalents		$ 341	$ 836	$ 1,399	$ 863
Accounts Receivable [Abstract]
Other		46	59
Accounts receivable		666	673
Prepayments		63	66
Price risk management assets		63	139
Other current assets		52	63
Total Current Assets		2,067	2,646
Other Noncurrent Assets [Abstract]
Price risk management assets		336	156
Other noncurrent assets		160	155
Total Other Noncurrent Assets		6,174	6,273
Total Assets		38,315	39,301
Current Liabilities [Abstract]
Short-term debt		923	916
Long-term debt due within one year		518	485
Dividends		259	255
Taxes		101	85
Other current liabilities		569	549
Total Current Liabilities		3,837	3,876
Long-term Debt [Abstract]
Total Long-term Debt		17,808	18,563
Total Deferred Credits and Other Noncurrent Liabilities		6,771	6,943
Equity [Abstract]
Common stock	[1]	7	7
Additional paid-in capital		9,841	9,687
Earnings reinvested		3,829	2,953
Accumulated other comprehensive income (loss)		(3,778)	(2,728)	(2,274)	(1,565)
Total Equity		9,899	9,919	13,628	12,466
Total Liabilities and Equity		$ 38,315	$ 39,301
PPL Corporation Shareowners' Common Equity Additional Information [Abstract]
Common stock par value		$ 0.01	$ 0.01
Common stock shares authorized		1,560,000	780,000
Common stock shares issued		679,731	673,857
Common stock shares outstanding		679,731	673,857
PPL Corp [Member]
Current Assets
Cash and cash equivalents		$ 4	$ 0	0	0
Accounts Receivable [Abstract]
Other		7	10
Accounts receivable from affiliates		10	20
Price risk management assets		63	139
Total Current Assets		84	169
Investments [Abstract]
Affiliated companies at equity		10,160	10,479
Other Noncurrent Assets [Abstract]
Deferred income taxes		70	100
Price risk management assets		284	133
Other noncurrent assets		1	1
Total Other Noncurrent Assets		355	234
Total Assets		10,599	10,882
Current Liabilities [Abstract]
Short-term debt with affiliates		44	385
Accounts payable with affiliates		30	16
Dividends		259	255
Price risk management liabilities		237	268
Other current liabilities		20	0
Total Current Liabilities		590	924
Long-term Debt [Abstract]
Total Deferred Credits and Other Noncurrent Liabilities		110	39
Equity [Abstract]
Common stock	[1]	7	7
Additional paid-in capital		9,841	9,687
Earnings reinvested		3,829	2,953
Accumulated other comprehensive income (loss)		(3,778)	(2,728)
Total Equity		9,899	9,919
Total Liabilities and Equity		$ 10,599	$ 10,882
PPL Corporation Shareowners' Common Equity Additional Information [Abstract]
Common stock par value		$ 0.01	$ 0.01
Common stock shares authorized		1,560,000	780,000
Common stock shares issued		679,731	673,857
Common stock shares outstanding		679,731	673,857
L G And E And K U Energy L L C Unconsolidated [Member]
Current Assets
Cash and cash equivalents		$ 1	$ 0	$ 0	$ 6
Accounts Receivable [Abstract]
Accounts receivable		0	1
Accounts receivable from affiliates		23	3
Income Taxes Receivable, Current		31	0
Notes receivable from affiliates		1,007	1,054
Total Current Assets		1,062	1,058
Investments [Abstract]
Affiliated companies at equity		5,219	5,076
Other Noncurrent Assets [Abstract]
Deferred income taxes		227	228
Total Assets		6,508	6,362
Current Liabilities [Abstract]
Short-term debt		0	75
Notes payable to affiliates		179	69
Accounts payable with affiliates		450	469
Taxes		0	3
Other current liabilities		6	5
Total Current Liabilities		635	621
Long-term Debt [Abstract]
Long-term debt		721	720
Notes payable to affiliates		480	500
Total Long-term Debt		1,201	1,220
Total Deferred Credits and Other Noncurrent Liabilities		5	4
Equity [Abstract]
Members Equity		4,667	4,517
Total Liabilities and Equity		$ 6,508	$ 6,362

[1] 1,560,000 shares authorized; 679,731 shares issued and outstanding at December 31, 2016; 780,000 shares authorized; 673,857 shares issued and outstanding at December 31, 2015.