SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Federal and state
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Tax Act, reduction in deferred tax asset valuation allowance	$ 61.5
Federal and state | Deferred Tax Asset Valuation Allowance
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation allowance recorded on portion of deferred tax assets	$ 61.5	$ 387.7	$ 61.5
Tax Act, reduction in deferred tax asset valuation allowance		$ 336.3
Foreign | Deferred Tax Asset Valuation Allowance
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation allowances released			$ 43.3