SCHEDULE I - CONDENSED UNCONSOLIDATED BALANCE SHEETS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current Assets
Cash and cash equivalents		$ 836	$ 1,399	$ 863	$ 488
Accounts Receivable [Abstract]
Other		59	71
Accounts receivable		673	737
Prepayments		66	75
Price risk management assets		139	79
Other current assets		63	55
Total Current Assets		2,646	6,026
Other Noncurrent Assets [Abstract]
Other noncurrent assets		311	203
Total Other Noncurrent Assets		6,273	14,411
Total Assets		39,301	48,606
Current Liabilities [Abstract]
Short-term debt		916	836
Long-term debt due within one year		485	1,000
Dividends		255	249
Taxes		85	263
Other current liabilities		549	632
Total Current Liabilities		3,876	7,439
Long-term Debt [Abstract]
Total Long-term Debt		18,563	17,054
Total Deferred Credits and Other Noncurrent Liabilities		6,943	10,485
Equity [Abstract]
Common stock	[1]	7	7
Additional paid-in capital		9,687	9,433
Earnings reinvested		2,953	6,462
Accumulated other comprehensive income (loss)		(2,728)	(2,274)	(1,565)	(1,940)
Total Equity		9,919	13,628	12,466	10,498
Total Liabilities and Equity		$ 39,301	$ 48,606
PPL Corporation Shareowners' Common Equity Additional Information [Abstract]
Common stock par value		$ 0.01	$ 0.01
Common stock shares authorized		780,000	780,000
Common stock shares issued		673,857	665,849
Common stock shares outstanding		673,857	665,849
PPL Corp [Member]
Current Assets
Cash and cash equivalents		$ 0	$ 0	0	0
Accounts Receivable [Abstract]
Other		10	53
Accounts receivable from affiliates		20	149
Price risk management assets		139	148
Total Current Assets		169	350
Investments [Abstract]
Affiliated companies at equity		10,479	15,426
Other Noncurrent Assets [Abstract]
Deferred income taxes		100	34
Price risk management assets		133	75
Other noncurrent assets		1	13
Total Other Noncurrent Assets		234	122
Total Assets		10,882	15,898
Current Liabilities [Abstract]
Short-term debt with affiliates		385	170
Accounts payable to affiliates		16	1,513
Dividends		255	249
Price risk management liabilities		268	227
Other current liabilities		0	65
Total Current Liabilities		924	2,224
Long-term Debt [Abstract]
Total Deferred Credits and Other Noncurrent Liabilities		39	46
Equity [Abstract]
Common stock	[1]	7	7
Additional paid-in capital		9,687	9,433
Earnings reinvested		2,953	6,462
Accumulated other comprehensive income (loss)		(2,728)	(2,274)
Total Equity		9,919	13,628
Total Liabilities and Equity		$ 10,882	$ 15,898
PPL Corporation Shareowners' Common Equity Additional Information [Abstract]
Common stock par value		$ 0.01	$ 0.01
Common stock shares authorized		780,000	780,000
Common stock shares issued		673,857	665,849
Common stock shares outstanding		673,857	665,849
L G And E And K U Energy L L C Unconsolidated [Member]
Current Assets
Cash and cash equivalents		$ 0	$ 0	$ 6	$ 0
Accounts Receivable [Abstract]
Accounts receivable		1	8
Accounts receivable from affiliates		3	0
Notes receivable from affiliates		1,054	1,127
Total Current Assets		1,058	1,135
Investments [Abstract]
Affiliated companies at equity		5,076	4,818
Other Noncurrent Assets [Abstract]
Deferred income taxes		228	205
Other noncurrent assets		0	1
Total Other Noncurrent Assets		228	206
Total Assets		6,362	6,159
Current Liabilities [Abstract]
Short-term debt		75	75
Notes payable to affiliates		69	58
Long-term debt due within one year		0	400
Accounts payable to affiliates		469	451
Taxes		3	2
Other current liabilities		5	8
Total Current Liabilities		621	994
Long-term Debt [Abstract]
Long-term debt		720	718
Notes payable to affiliates		500	196
Total Long-term Debt		1,220	914
Total Deferred Credits and Other Noncurrent Liabilities		4	3
Equity [Abstract]
Members Equity		4,517	4,248
Total Liabilities and Equity		$ 6,362	$ 6,159

[1] 780,000 shares authorized; 673,857 and 665,849 shares issued and outstanding at December 31, 2015 and 2014 .