Quarterly report pursuant to Section 13 or 15(d)

Accounting Policies - Allocation of Expenses (Details)

v3.3.0.814
Accounting Policies - Allocation of Expenses (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Accounting Policies      
Allocated general corporate costs $ 6.3 $ 13.6 $ 17.0
Allocated operating expenses $ 6.5 5.6 $ 14.5
Understatement of Allocation of Corporate Expense      
Correction of error      
Correction or error in current period, amount   $ 1.9