Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Additional Paid-in Capital
Significant Accounting Policies [Line Items]
Reclassifications between additional paid in capital and non-controlling Interests	$ 169.2	$ 60.0	$ 32.8	$ 37.7	$ 76.8	$ (6.8)
Non-Controlling Interests
Significant Accounting Policies [Line Items]
Reclassifications between additional paid in capital and non-controlling Interests	$ (169.2)	$ (60.0)	$ (32.8)	$ (37.7)	$ (76.8)	$ 6.8