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Other Income (Expense)- net Other Income (Expense) - net (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Other Expense |  |
Economic foreign currency exchange contracts | $ 112 | $ 43
Charitable Contributions | 4 | 4
Miscellaneous | 1 | 11
Total Other Expense | 117 | 58
Other Income [Line Items] |  |
Defined benefit plans - non-service credits | 68 | 38
Allowance for Funds Used During Construction - equity component | 5 | 2
Miscellaneous | 1 | 9
Total Other Income | 74 | 49
Other Income (Expense) - net | (43) | (9)
PPL Electric Utilities Corp [Member] |  |
Other Expense |  |
Charitable Contributions | 1 | 1
Defined benefit plans - non-service costs | 0 | 1
Total Other Expense | 1 | 2
Other Income [Line Items] |  |
Defined benefit plans - non-service credits | 2 | 0
Allowance for Funds Used During Construction - equity component | 5 | 2
Total Other Income | 7 | 2
Other Income (Expense) - net | $ 6 | $ 0

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