Other Income (Expense), Net (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Other Income and Expenses [Abstract]        
Facilities closure costs and other [1] $ (1.6) $ 0.0 $ (5.0) $ 0.0
Acquisition-related costs [2] (2.0) 0.0 (2.3) 0.0
Multiemployer pension withdrawal [3] 0.0 0.0 (0.9) 0.0
Asset disposals and write-offs (0.6) (5.0) (3.5) (9.7)
Integration-related and other costs [4] 0.0 (2.4) 0.0 (9.0)
Sale of St. Helens paper mill site [5] 0.0 6.7 0.0 6.7
DeRidder restructuring [6] 0.0 3.8 0.0 3.6
Refundable state tax credit [7] 0.0 0.0 0.0 3.6
Other (2.0) 0.7 (3.5) 1.9
Other income (expense), net $ (6.2) $ 3.8 $ (15.2) $ (2.9)
[1] The three and nine months ended September 30, 2016 include facilities closure costs related to corrugated products facilities and a paper products facility.
[2] The three and nine months ended September 30, 2016 include acquisition-related costs for the TimBar Corporation acquisition.
[3] The nine months ended September 30, 2016 include costs related to our withdrawal from a multiemployer pension plan for one of our corrugated products facilities.
[4] The three and nine months ended September 30, 2015 include Boise acquisition integration-related and other costs. These costs primarily relate to professional fees, severance, retention, relocation, travel, and other integration-related costs.
[5] The three and nine months ended September 30, 2015 include a gain on the sale of the paper mill site in St. Helens, Oregon, where we ceased paper production in December 2012.
[6] The three and nine months ended September 30, 2015 include amounts from restructuring activities at our mill in DeRidder, Louisiana.
[7] The nine months ended September 30, 2015 include a tax credit from the State of Louisiana related to our capital investment and the jobs retained at the DeRidder, Louisiana mill.