XML 50 R24.htm IDEA: XBRL DOCUMENT

Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Scott Armstrong serves on the Board of Directors of the Company and, until its acquisition by Kaiser Permanente on February 1, 2017, was the President and Chief Executive Officer of Group Health Cooperative (Group Health), a health insurance and medical care provider. Certain employees of PSE elected Group Health as their medical provider prior to its acquisition by Kaiser Permanente and as a result, PSE paid Group Health a total of $3.9 million and $23.3 million for medical coverage for the year ended December 31, 2017 and 2016. Kaiser Permanente is not considered a related party to PSE.