v3.4.0.3
Dispositions (Details) - Corporate and Other - ITF - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]    
Gain (loss) on disposition of business $ 0.0  
Assets and liabilities included in held for sale    
Property, plant, and equipment   $ 37.2
Accounts receivable and unbilled revenues   34.9
Materials, supplies, and inventories   18.4
Other current assets   2.6
Other long-term assets   3.7
Total assets   96.8
Accounts payable   12.9
Accrued payroll and benefits   2.4
Other current liabilities   4.5
Pension and OPEB obligations   1.2
Other long-term liabilities   0.6
Total liabilities   $ 21.6