Supplementary Data to Statements of Operations	3 Months Ended
Mar. 31, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Supplementary Data to Statements of Operations	11. Supplementary Data to Statements of Operations Other expense, net for the three months ended March 31, 2019, consisted of foreign currency translation expense of $0.3 and net periodic benefit expense, excluding service cost of $1.3. Other income, net for the three months ended March 31, 2018, consisted of foreign currency translation income of $2.8 and net periodic benefit expense, excluding service cost of $0.6. For the three months ended March 31, 2018, the foreign currency translation is primarily related to remeasurement gains and losses resulting from intercompany receivables or payables of a U.S. subsidiary denominated in Canadian dollars. This intercompany payable was repaid in the second quarter of 2018.

Supplementary Data to Statements of Operations

3 Months Ended

Mar. 31, 2019

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Supplementary Data to Statements of Operations

11. Supplementary Data to Statements of Operations

Other expense, net for the three months ended March 31, 2019, consisted of foreign currency translation expense of $0.3 and net periodic benefit expense, excluding service cost of $1.3. Other income, net for the three months ended March 31, 2018, consisted of foreign currency translation income of $2.8 and net periodic benefit expense, excluding service cost of $0.6. For the three months ended March 31, 2018, the foreign currency translation is primarily related to remeasurement gains and losses resulting from intercompany receivables or payables of a U.S. subsidiary denominated in Canadian dollars. This intercompany payable was repaid in the second quarter of 2018.