Income and Other Taxes (Income Tax Expense and Reconciliation of Income Tax Expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended																		2 Months Ended		12 Months Ended				10 Months Ended		2 Months Ended	10 Months Ended	12 Months Ended		2 Months Ended		12 Months Ended				10 Months Ended		2 Months Ended		12 Months Ended				10 Months Ended
	Dec. 31, 2012 Integer		Dec. 31, 2011		Dec. 31, 2010 Integer		Dec. 31, 2012 PPL Energy Supply LLC [Member]		Dec. 31, 2011 PPL Energy Supply LLC [Member]		Dec. 31, 2010 PPL Energy Supply LLC [Member]		Dec. 31, 2012 PPL Electric Utilities Corp [Member] Integer		Dec. 31, 2011 PPL Electric Utilities Corp [Member]		Dec. 31, 2010 PPL Electric Utilities Corp [Member] Integer		Dec. 31, 2010 LG And E And KU Energy LLC [Member] Successor [Member]		Dec. 31, 2012 LG And E And KU Energy LLC [Member] Successor [Member]		Dec. 31, 2011 LG And E And KU Energy LLC [Member] Successor [Member]		Oct. 31, 2010 LG And E And KU Energy LLC [Member] Predecessor [Member]		Dec. 31, 2010 Louisville Gas And Electric Co [Member]	Oct. 31, 2010 Louisville Gas And Electric Co [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member]	Dec. 31, 2011 Louisville Gas And Electric Co [Member]	Dec. 31, 2010 Louisville Gas And Electric Co [Member] Successor [Member]		Dec. 31, 2012 Louisville Gas And Electric Co [Member] Successor [Member]		Dec. 31, 2011 Louisville Gas And Electric Co [Member] Successor [Member]		Oct. 31, 2010 Louisville Gas And Electric Co [Member] Predecessor [Member]		Dec. 31, 2010 Kentucky Utilities Co [Member] Successor [Member]		Dec. 31, 2012 Kentucky Utilities Co [Member] Successor [Member]		Dec. 31, 2011 Kentucky Utilities Co [Member] Successor [Member]		Oct. 31, 2010 Kentucky Utilities Co [Member] Predecessor [Member]
Income Tax Expense (Benefit)
Current - Federal			$ 54		$ (51)		$ 89		$ 139		$ 208		$ (28)		$ (25)		$ (127)		$ (31)		$ (32)		$ (71)		$ 33						$ (4)		$ (2)		$ 12		$ 32		$ 13		$ (20)		$ (8)		$ 46
Current - State	(2)		(20)		43		22		(12)		78		(18)		(13)		(14)		4		2		6		11						1		3		8		5		3		(1)		4		9
Current - Foreign	121		73		20
Total Current Expense (Benefit)	119		107		12		111		127		286		(46)		(38)		(141)		(27)		(30)		(65)		44						(3)		1		20		37		16		(21)		(4)		55
Deferred - Federal	553		558		358		193		251		66		162		123		184		52		185		208		62						12		65		52		21		4		111		101		20
Deferred - State	103		127		(82)		10		70		(89)		42		25		27		1		15		16		5						1		6		2		2				11		10		3
Deferred - Foreign	35		(23)		(9)
Total Deferred Expense (Benefit), excluding operating loss carry forwards	691		662		267		203		321		(23)		204		148		211		53		200		224		67						13		71		54		23		4		122		111		23
Investment tax credit, net - Federal	(10)		(10)		(5)		(2)		(3)		(2)		(1)		(2)		(2)		(1)		(6)		(6)		(2)								(3)		(3)		(2)				(3)		(3)
Tax benefit of operating loss carryforwards [Abstract]
Deferred - Federal	(195)		(30)		6		(48)						(72)		(12)		6				(46)																				(20)
Deferred - State	(60)		(38)		(17)		(1)						(17)		(28)		(17)				(12)
Total Tax Benefit of Operating Loss Carryforwards	(255)		(68)		(11)		(49)						(89)		(40)		(11)				(58)																				(20)
Total income taxes from continuing operations	545	[1]	691	[1]	263	[1]	263	[2]	445	[2]	261	[2]	68		68		57		25	[3]	106	[3]	153	[3]	109	[3]					10	[4]	69	[4]	71	[4]	58	[4]	20	[5]	78	[5]	104	[5]	78	[5]
Income tax expense (benefit) from continuing operations [Abstract]
Total income tax expense - Federal	348		572		308		232		387		272		61		84		61		20		101		131		93						8		60		61		51		17		68		90		66
Total income tax expense (benefit) - State	41		69		(56)		31		58		(11)		7		(16)		(4)		5		5		22		16						2		9		10		7		3		10		14		12
Total income tax expense - Foreign	156		50		11
Total income taxes from continuing operations	545	[1]	691	[1]	263	[1]	263	[2]	445	[2]	261	[2]	68		68		57		25	[3]	106	[3]	153	[3]	109	[3]					10	[4]	69	[4]	71	[4]	58	[4]	20	[5]	78	[5]	104	[5]	78	[5]
Current and deferred federal, state and foreign tax expense (benefit) recorded to Discontinued Operations	(4)		2		(6)				3		(5)								1		(4)		(1)		(1)
Realized tax benefits related to stock-based compensation, recorded as an increase to capital in excess of par	(1)		3
Tax benefits related to the issuance of the Purchase Contracts recorded an increase to capital in excess of par			5		10
Federal, state, and foreign tax expense (benefit) recorded to OCI	(526)		(137)		83		(267)		(83)		132								3		(12)		(1)		(7)												7				1				(1)
Amount excluded from related to valuation allowances for state deferred taxes			3
Reconciliation of Income Tax Expense
Federal income tax on Income (Loss) from Continuing Operations Before Income Taxes at statutory tax rate - 35%	729		770		434		258		424		308		71		90		67		25		116		147		105						10		67		68		58		19		75		99		77
Federal statutory rate	35.00%		35.00%		35.00%		35.00%		35.00%		35.00%		35.00%		35.00%		35.00%		35.00%		35.00%		35.00%		35.00%						35.00%		35.00%		35.00%		35.00%		35.00%		35.00%		35.00%		35.00%
Increase (decrease) due to:
State income taxes, net of federal income tax benefit	27		63		36		33		60		41		9		12		9		2		6		15		9						1		5		7		4		2		6		9		8
State valuation allowance adjustments	13	[6]	36	[6]	(65)		2	[7]	22	[7]	(52)	[7]
Impact of lower U.K. income tax rates	(123)	[8]	(41)	[8]	(20)	[8]
U.S. income tax on foreign earnings - net of foreign tax credit	43	[9]	(14)	[9]	34	[9]
Federal and state tax reserve adjustments	(1)	[10]	39	[10]	(60)	[10]	(2)		2		(11)		(8)	[11]	(9)	[11]	(12)	[11]
Foreign tax reserve adjustments	(5)	[12]	(141)	[12]
Federal and state income tax return adjustments	16	[13],[6]	(17)	[13],[6]	(3)		4		(22)	[14]	(6)	[14]	7	[15]	(4)	[15],[16]	(1)	[16]
Foreign income tax return adjustments	(6)
Domestic manufacturing deduction					(11)	[13],[17]					(11)	[14],[18]
Health Care Reform					8	[19]					5	[20]
Foreign losses resulting from restructuring					(261)	[12]
Enactment of the U.K.'s Finance Acts	(75)	[8]	(69)	[8]	(18)	[8]
Federal income tax credits	(12)	[21]	(13)	[21]	(12)	[21]	(12)	[22]	(12)	[22]	(12)	[22]
Amortization of investment tax credit													(1)		(2)		(2)				(6)		(5)		(2)
Depreciation not normalized	(11)	[6]	(20)	[6]	(3)								(8)	[15]	(17)	[15]	(3)
Foreign valuation allowance adjustments			147	[12]	215	[12]
State deferred tax rate change	(19)	[23]	(26)	[23]			(19)	[24]	(26)	[24]
Net operating loss carryforward adjustments	(9)	[25]																			(9)	[26]
Intercompany interest on U.K. financing entities	(13)	[27]	(12)	[27]
Other	(9)		(11)		(11)		(1)		(3)		(1)		(2)		(2)		(1)		(2)		(1)		(4)		(3)						(1)		(3)		(4)		(4)		(1)		(3)		(4)		(7)
Total increase (decrease)	(184)		(79)		(171)		5		21		(47)		(3)		(22)		(10)				(10)		6		4								2		3				1		3		5		1
Total income tax from continuing operations	545		691		263		263		445		261		68		68		57		25		106		153		109						10		69		71		58		20		78		104		78
Effective income tax rate	26.20%		31.40%		21.20%		35.60%		36.70%		29.60%		33.30%		26.50%		29.70%		35.70%		32.00%		36.50%		36.30%						34.50%		35.90%		36.40%		34.70%		36.40%		36.30%		36.90%		35.80%
Bonus depreciation percentage	100.00%		100.00%				100.00%		100.00%				100.00%		100.00%
Deferred tax expense recorded due to state clarification on treatment of bonus depreciation			43
Minimum property value for extended deadline for bonus depreciation	1												1
Minimum production period extended deadline for bonus depreciation (in years)	1												1
Minimum tax life for extended deadline for bonus depreciation (in years)	10												10
Net operating loss limitation	20.00%		20.00%		20.00%		20.00%		20.00%		20.00%
United Kingdom statutory income tax rate in effect during period prior to a change	25.00%		27.00%		28.00%
United Kingdom statutory income tax rate reduction	24.00%		26.00%		27.00%
United Kingdom statutory income tax rate reduction for next year	23.00%		25.00%
Adjustment to federal income tax expense related to the recalculation of 2010 U.K. earnings and profits	23
Tax expense on foreign earnings of certain U.K. financing entities not indefinitely reinvested	19
Tax benefit recorded due to United Kingdom pension contributions			(28)
Benefit from favorable U.S. Tax Court decision on deductibility of United Kingdom windfall profit tax					42
Depreciable useful life for tax purposes of street lighting assets (in years)					7												7
Benefit from favorable U.S. Tax Court decision on depreciable useful lives of street lighting					7												7
Benefit recorded related to stranded cost securitization included in change in federal and state income tax reserves	6		6		7								6		6		7
Benefit related to reversal of foreign tax reserves for capital losses			(147)
Reversal of prior years' state income tax benefit related to regulated depreciation	(5)														(5)
Benefit as a result of filing 2010 federal and state income tax returns															5
Benefit related to 2010 federal and state tax return adjustments related to domestic manufacturing deduction			7						7
Benefit related to 2010 federal and state tax return adjustments related to the flow through impact of Pennsylvania regulated state tax depreciation			3												3
Taxes, other than income
State gross receipts	135		140		145		35		31		15		101		109		130
State utility realty	2		(9)		5								2		(10)	[28]	5
State capital stock	7		18		6		5		12		4		1		4		2
Foreign property	147	[29]	113	[29]	52
Domestic property and other	75		64	[30]	30	[30]	29		28		27		1		1		1		2		46		37		21		1	12	23	18									1		23		19		9
Total	$ 366		$ 326		$ 238		$ 69		$ 71		$ 46		$ 105		$ 104		$ 138		$ 2		$ 46		$ 37		$ 21						$ 1		$ 23		$ 18		$ 12		$ 1		$ 23		$ 19		$ 9

[1] Excludes current and deferred federal and state tax expense (benefit) recorded to Discontinued Operations of $(4) million in 2012, $2 million in 2011 and $(6) million in 2010. Excludes realized tax expense (benefits) related to stock-based compensation, recorded as a decrease (increase) to additional paid-in capital of $(1) million in 2012, $3 million in 2011 and an insignificant amount in 2010. Excludes tax benefits related to the issuance costs of the Purchase Contracts, recorded as an increase to additional paid-in capital of an insignificant amount in 2012, $5 million in 2011 and $10 million in 2010, offset by an insignificant amount of related valuation allowances for state deferred taxes in 2012 and 2011. Also excludes federal, state, and foreign tax expense (benefit) recorded to OCI of $(526) million in 2012, $(137) million in 2011 and $83 million in 2010, and related valuation allowances for state deferred taxes of an insignificant amount in 2012 and $3 million in 2011.

[2] Excludes current and deferred federal, state and foreign tax expense (benefit) recorded to Discontinued Operations of $3 million in 2011 and $(5) million in 2010. Also, excludes federal, state and foreign tax expense (benefit) recorded to OCI of $(267) million in 2012, $(83) million in 2011 and $132 million in 2010. The deferred tax benefit of operating loss carryforwards was insignificant for 2011 and 2010.

[3] Excludes current and deferred federal and state tax expense (benefit) recorded to Discontinued Operations of $(4) million in 2012, $(1) million in 2011, $1 million for the two month period ended December 31, 2010 and $(1) million for the ten month period ended October 31, 2010. Also, excludes deferred federal and state tax expense (benefit) recorded to OCI of $(12) million in 2012, $(1) million in 2011, $3 million for the two month period ended December 31, 2010 and $(7) million for the ten month period ended October 31, 2010.

[4] Excludes deferred federal and state tax expense recorded to OCI of $7 million for the ten month period ended October 31, 2010.

[5] Excludes deferred federal and state tax (benefit) recorded to OCI of $1 million in 2012 and $(1) million for the ten month period ended October 31, 2010.

[6] During 2011, the Pennsylvania Department of Revenue issued interpretive guidance on the treatment of bonus depreciation for Pennsylvania income tax purposes. The guidance allows 100% bonus depreciation for qualifying assets in the same year bonus depreciation is allowed for federal income tax purposes. Due to the decrease in projected taxable income related to bonus depreciation and a decrease in projected future taxable income, PPL recorded $43 million in state deferred income tax expense related to deferred tax valuation allowances during 2011. Additionally, the 100% Pennsylvania bonus depreciation deduction created a current state income tax benefit for the flow-through impact of Pennsylvania regulated state tax depreciation. The federal provision for 100% bonus depreciation generally applies to property placed into service before January 1, 2012. The placed in-service deadline is extended to January 1, 2013 for property that has a cost in excess of $1 million, has a production period longer than one year and has a tax life of at least ten years. PPL’s tax deduction for 100% bonus regulated tax depreciation was significantly lower in 2012 than in 2011. Pennsylvania H.B. 1531, enacted in October 2009, increased the net operating loss limitation to 20% of taxable income for tax years beginning in 2010. Based on the projected revenue increase related to the expiration of the generation rate caps in 2010, PPL recorded a $72 million state deferred income tax benefit related to the reversal of deferred tax valuation allowances related to the future projections of taxable income over the remaining carryforward period of the net operating losses.

[7] During 2011, the Pennsylvania Department of Revenue issued interpretive guidance on the treatment of bonus depreciation for Pennsylvania income tax purposes. The guidance allows 100% bonus depreciation for qualifying assets in the same year bonus depreciation is allowed for Federal income tax purposes. Due to the decrease in projected taxable income related to bonus depreciation and a decrease in projected future taxable income, PPL Energy Supply recorded $22 million in state deferred income tax expense related to deferred tax valuation allowances during 2011. Pennsylvania H.B. 1531, enacted in October 2009, increased the net operating loss limitation to 20% of taxable income for tax years beginning in 2010. Based on the projected revenue increase related to the expiration of the generation rate caps, PPL Energy Supply recorded a $52 million state deferred income tax benefit related to the reversal of deferred tax valuation allowances over the remaining carry forward period of the net operating losses during 2010.

[8] The U.K.’s Finance Act of 2012, enacted in July 2012, reduced the U.K. statutory income tax rate from 25% to 24% retroactive to April 1, 2012 and from 24% to 23% effective April 1, 2013. As a result, PPL reduced its net deferred tax liabilities and recognized a deferred tax benefit during 2012 related to both rate decreases. The U.K.’s Finance Act of 2011, enacted in July 2011, reduced the U.K. statutory income tax rate from 27% to 26% retroactive to April 1, 2011 and from 26% to 25% effective April 1, 2012. As a result, PPL reduced its net deferred tax liabilities and recognized a deferred tax benefit during 2011 related to both rate decreases. The U.K.’s Finance Act of 2010, enacted in July 2010, reduced the U.K. statutory income tax rate from 28% to 27% effective April 1, 2011. As a result, PPL reduced its net deferred tax liabilities and recognized a deferred tax benefit during 2010.

[9] During 2012, PPL recorded a $23 million adjustment to federal income tax expense related to the recalculation of 2010 U.K. earnings and profits and $19 million of U.S. income tax expense on foreign earnings of certain U.K. financing entities not indefinitely reinvested. During 2011, PPL recorded a $28 million federal income tax benefit related to U.K. pension contributions. During 2010, PPL recorded additional U.S. income tax expense primarily resulting from increased taxable dividends.

[10] In 1997, the U.K. imposed a Windfall Profits Tax (WPT) on privatized utilities, including WPD. PPL filed its federal income tax returns for years subsequent to its 1997 and 1998 claims for refund on the basis that the U.K. WPT was creditable. In September 2010, the U.S. Tax Court (Tax Court) ruled in PPL’s favor in a dispute with the IRS, concluding that the U.K. WPT is a creditable tax for U.S. tax purposes. As a result, and with the finalization of other issues, PPL recorded a $42 million tax benefit in 2010. In January 2011, the IRS appealed the Tax Court’s decision to the U.S. Court of Appeals for the Third Circuit (Third Circuit). In December 2011, the Third Circuit issued its opinion reversing the Tax Court’s decision, holding that the U.K. WPT is not a creditable tax. As a result of the Third Circuit’s adverse determination, PPL recorded a $39 million expense in 2011. In February 2012, PPL filed a petition for rehearing of the Third Circuit’s opinion. In March 2012, the Third Circuit denied PPL’s petition. In June 2012, the U.S. Court of Appeals for the Fifth Circuit issued a contrary opinion in an identical case involving another company. In July 2012, PPL filed a petition for a writ of certiorari seeking U.S. Supreme Court review of the Third Circuit’s opinion. The Supreme Court granted PPL’s petition on October 29, 2012, and oral argument was held on February 20, 2013. PPL expects the case to be decided before the end of the Supreme Court’s current term in June 2013 and cannot predict the outcome of this matter. In July 2010, the Tax Court ruled in PPL’s favor in a dispute with the IRS, concluding that street lighting assets are depreciable for tax purposes over seven years. As a result, PPL recorded a $7 million tax benefit to federal and state income tax reserves and related deferred income taxes. The IRS did not appeal this decision. PPL recorded a tax benefit of $6 million during 2012 and 2011 and $7 million during 2010 to federal and state income tax reserves related to stranded cost securitization.

[11] In July 2010, the U.S. Tax Court ruled in PPL Electric’s favor in a dispute with the IRS, concluding that street lighting assets are depreciable for tax purposes over seven years. As a result, PPL Electric recorded a $7 million tax benefit to federal and state income tax reserves and related deferred income taxes. The IRS did not appeal this decision. PPL Electric recorded a tax benefit of $6 million during 2012 and 2011 and $7 million during 2010 to federal and state income tax reserves related to stranded cost securitization.

[12] During 2012, PPL recorded a foreign tax benefit following resolution of a U.K. tax issue related to interest expense. During 2011, WPD reached an agreement with HMRC related to the amount of the capital losses that resulted from prior years’ restructuring in the U.K. and recorded a $147 million foreign tax benefit for the reversal of tax reserves related to the capital losses. Additionally, WPD recorded a $147 million valuation allowance for the amount of capital losses that, more likely than not, will not be utilized. During 2010, PPL recorded a $261 million foreign tax benefit in conjunction with losses resulting from restructuring in the U.K. A portion of these losses offset tax on a deferred gain from a prior year sale of WPD’s supply business. WPD recorded a $215 million valuation allowance for the amount of capital losses that, more likely than not, will not be utilized.

[13] During 2012, PPL recorded federal and state income tax expense related to the filing of the 2011 federal and state income tax returns. Of this amount, $5 million relates to the reversal of prior years’ state income tax benefits related to regulated depreciation. PPL changed its method of accounting for repair expenditures for tax purposes effective for its 2008 tax year. In August 2011, the IRS issued guidance regarding the use and evaluation of statistical samples and sampling estimates for network assets. The IRS guidance provided a safe harbor method of determining whether the repair expenditures for electric transmission and distribution property can be currently deducted for tax purposes. PPL adopted the safe harbor method with the filing of its 2011 federal income tax return. During 2011, PPL recorded federal and state tax benefits related to the filing of the 2010 federal and state income tax returns. Of this amount, $7 million in tax benefits related to an additional domestic manufacturing deduction resulting from revised bonus depreciation amounts and $3 million in tax benefits related to the flow-through impact of Pennsylvania regulated state tax depreciation.

[14] During 2011, PPL recorded federal and state tax benefits related to the filing of the 2010 federal and state income tax returns. Of this amount, $7 million in tax benefits related to an additional domestic manufacturing deduction resulting from revised bonus depreciation amounts.

[15] During 2011, the Pennsylvania Department of Revenue issued interpretive guidance on the treatment of bonus depreciation for Pennsylvania income tax purposes. The guidance allows 100% bonus depreciation for qualifying assets in the same year bonus depreciation is allowed for federal income tax purposes. The 100% Pennsylvania bonus depreciation deduction created a current state income tax benefit for the flow-through impact of Pennsylvania regulated state tax depreciation. The federal provision for 100% bonus depreciation generally applies to property placed into service before January 1, 2012. The placed in-service deadline is extended to January 1, 2013 for property that has a cost in excess of $1 million, has a production period longer than one year and has a tax life of at least ten years. PPL Electric’s tax deduction for 100% bonus depreciation was significantly lower in 2012 than in 2011.

[16] PPL Electric changed its method of accounting for repair expenditures for tax purposes effective for its 2008 tax year. In August 2011, the IRS issued guidance regarding the use and evaluation of statistical samples and sampling estimates for network assets. The IRS guidance provided a safe harbor method of determining whether the repair expenditures for electric transmission and distribution property can be currently deducted for tax purposes. PPL Electric adopted the safe harbor method with the filing of its 2011 federal income tax return and recorded a $5 million adjustment to federal and state income tax expense resulting from the reversal of prior years’ state income tax benefits related to regulated depreciation. During 2011, PPL Electric recorded a $5 million federal and state income tax benefit as a result of filing its 2010 federal and state income tax returns. Of this amount, $3 million in tax benefits related to the flow-through impact of Pennsylvania regulated 100% bonus tax depreciation.

[17] In December 2010, Congress enacted legislation allowing for 100% bonus depreciation on qualified property. The increased tax depreciation eliminated the tax benefits related to domestic manufacturing deductions in 2012 and 2011.

[18] In December 2010, Congress enacted legislation allowing for 100% bonus depreciation on qualified property. The increased tax depreciation deduction eliminated the tax benefits related to domestic manufacturing deductions in 2012 and 2011.

[19] Beginning in 2013, provisions within Health Care Reform eliminated the tax deductibility of retiree health care costs to the extent of federal subsidies received by plan sponsors that provide retiree prescription drug benefits equivalent to Medicare Part D Coverage. As a result, PPL recorded deferred income tax expense during 2010. See Note 13 for additional information.

[20] Beginning in 2013, provisions within Health Care Reform eliminated the tax deductibility of retiree health care costs to the extent of federal subsidies received by plan sponsors that provide retiree prescription drug benefits equivalent to Medicare Part D Coverage. As a result, PPL Energy Supply recorded deferred income tax expense during 2010. See Note 13 for additional information.

[21] During 2012, 2011 and 2010, PPL recorded a deferred tax benefit related to investment tax credits on progress expenditures related to hydroelectric plant expansions. See Note 8 for additional information.

[22] During 2012, 2011 and 2010, PPL Energy Supply recorded a deferred tax benefit related to investment tax credits on progress expenditures related to hydroelectric plant expansions. See Note 8 for additional information.

[23] In 2011, PPL completed the sale of certain non-core generation facilities. See Note 9 for additional information. Due to changes in state apportionment resulting in reductions in the future estimated state tax rate, PPL recorded deferred tax benefits related to its December 31, 2012 and 2011 state deferred tax liabilities.

[24] In 2011, PPL Energy Supply completed the sale of certain non-core generation facilities. See Note 9 for additional information. Due to changes in state apportionment resulting in reductions in the future estimated state tax rate, PPL Energy Supply recorded deferred tax benefits related to its December 31, 2012 and 2011 state deferred tax liabilities.

[25] During 2012, PPL recorded adjustments to deferred taxes related to net operating loss carryforwards of LKE based on income tax return adjustments.

[26] During 2012, LKE recorded adjustments to deferred taxes related to net operating loss carryforwards based on income tax return adjustments.

[27] During 2012 and 2011, PPL recorded foreign income tax benefits related to interest expense on intercompany loans for which there was no domestic income tax expense.

[28] 2011 includes PURTA tax that was refunded to PPL Electric customers in 2011.

[29] The increase between 2011 and 2010 is due primarily to the acquisition of WPD Midlands on April 1, 2011. See Note 10 for additional information.

[30] The increase between 2011 and 2010 is due primarily to the acquisition of LKE on November l, 2010. See Note 10 for additional information.