Equity Investments - Shcedule of Investees (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Equity investments	$ 153.1	$ 135.1
GDS, Class A share equivalent
Schedule of Equity Method Investments [Line Items]
Fair value	133.4	118.7
ODATA Brasil S.A.
Schedule of Equity Method Investments [Line Items]
Cost method	17.4	15.4
ODATA Colombia S.A.S
Schedule of Equity Method Investments [Line Items]
Cost method	$ 2.3	$ 1.0