XML 44 R31.htm IDEA: XBRL DOCUMENT v3.7.0.1
Investments - Held-to-Maturity and Other (Details) - USD ($)
$ in Millions
Jun. 30, 2017
Dec. 31, 2016
Marketable investments classified as held-to-maturity:    
Marketable Investments classified as held-to-maturity $ 29.0 $ 30.1
Time deposits    
Other investments    
Other investments $ 25.1