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Goodwill | 3 Months Ended
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Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangible Assets | 15. Goodwill and Other Intangible Assets (PPL) The change in the carrying amount of goodwill for the three months ended March 31, 2018 was due to the effect of foreign currency exchange rates on the U.K. Regulated segment.

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- Definition The entire disclosure for goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2144439 + Details
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