CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Cash balance	$ 48.6	$ 80.2	$ 111.2	$ 72.0
Restricted cash balances	0.0	0.0	0.0	5.8
Discontinued Operations
Cash balance	$ 0.0	$ 70.5	$ 137.3	$ 245.4