No definition available.

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Balance Type:	na
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- Definition

Decrease in the amount of depreciation expense on property, plant and equipment (PPE) resulting from a change in the weighted average useful lives.

+ References

No definition available.

+ Details

Name:	ppl_PublicUtilitiesPropertyPlantAndEquipmentDistributionDepreciationDecreaseFromChangeInUsefulLife
Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Decrease in the after-tax amount of depreciation expense on property, plant and equipment (PPE) resulting from a change in the weighted average useful lives.

+ References

No definition available.

+ Details

Name:	ppl_PublicUtilitiesPropertyPlantAndEquipmentDistributionDepreciationDecreaseFromChangeInUsefulLifeAfterTax
Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Decrease in the per share amount of depreciation expense on property, plant and equipment (PPE) resulting from a change in the weighted average useful lives.

+ References

No definition available.

+ Details

Name:	ppl_PublicUtilitiesPropertyPlantAndEquipmentDistributionDepreciationDecreaseFromChangeInUsefulLifePerShare
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Balance Type:	na
Period Type:	duration

- Definition

Represents purchases, under a PUC-approved program, of certain accounts receivable from alternative provider of last resort suppliers at a nominal discount, which reflects a provision for uncollectible accounts.

+ References

No definition available.

+ Details

Name:	ppl_PurchasesOfAccountsReceivable
Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Useful life of utility distribution assets owned by public utility, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesPropertyPlantAndEquipmentDistributionUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

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Balance Type:
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CounterpartyNameAxis=ppl_PplEnergyplusMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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- Details

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Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Unaffiliated Third Party Entity [Member]
Accounts Receivable (Numeric) [Abstract]
Purchases of accounts receivable	$ 361	$ 260	$ 968	$ 874
PPL Electric Utilities Corp [Member] \| Unaffiliated Third Party Entity [Member]
Accounts Receivable (Numeric) [Abstract]
Purchases of accounts receivable	361	260	968	874
PPL Electric Utilities Corp [Member] \| PPL EnergyPlus [Member]
Accounts Receivable (Numeric) [Abstract]
Purchases of accounts receivable	$ 0	$ 77	$ 146	$ 261
WPD [Member]
Depreciation (Numeric) [Abstract]
Weighted average useful life	69 years		69 years
Decrease in depreciation expense from change in weighted average useful lives	$ 22		$ 64
Decrease in depreciation expense from change in weighted average useful lives, after-tax	$ 17		$ 50
Decrease in depreciation expense from change in weighted average useful lives, per share	$ 0.03		$ 0.08
WPD [Member] \| Previously Reported [Member]
Depreciation (Numeric) [Abstract]
Weighted average useful life					55 years