XML 44 R27.htm IDEA: XBRL DOCUMENT

Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions We have a 19.50% equity investment in National Accounts Service Company, LLC, or NASCO, which processes National Accounts claims and provides other administrative services for us and certain other Blue Cross Blue Shield plans. Administrative expenses incurred related to NASCO services totaled $73.0, $79.7 and $83.6, for the years ended December 31, 2017, 2016 and 2015, respectively. Amounts due to NASCO were $5.7 and $6.2 at December 31, 2017 and 2016, respectively.