Acquisitions, Investments, and Licenses (Tables)
|12 Months Ended|
Dec. 31, 2018
|Business Combinations [Abstract]|
|Accounting Method, Carrying Value and Underlying Equity in Net Assets of Unconsolidated Investments||The following table reflects the accounting method, carrying value and underlying equity in net assets of our unconsolidated investments as of December 31, 2018:
|Schedule of Net Gains and Losses on Equity Securities||
A table of investments, shown as a text block.
Reference 1: http://www.xbrl.org/2003/role/presentationRef