Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Allocation of Expenses (Details)

v3.3.1.900
Summary of Significant Accounting Policies - Allocation of Expenses (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Correction of error      
Allocated general corporate costs $ 13.6 $ 21.9 $ 22.1
Allocated operating expenses 5.6 $ 17.8 $ 16.0
Understatement of Allocation of Corporate Expense      
Correction of error      
Correction or error in current period, amount $ 1.9