Summary of Significant Accounting Policies Short Term Investments (Policies)

12 Months Ended

Dec. 31, 2015

Statement of Financial Position [Abstract]

Short-term cash investments, net

Short-Term Investments: Short-term investments of $47 million as of December 31, 2015 include corporate bonds, asset backed securities and commercial paper with maturities between three and twelve months held as part of the Company's separately managed accounts. The cost of these Level 1 investments approximates fair value.