Subsequent Events (Tables)

12 Months Ended

Dec. 31, 2018

Subsequent Event [Line Items]

Schedule of Foreign Exchange Forward Contracts Entered into After Period End[Table Text Block]

During the first quarter of 2019, the company entered into a series of foreign exchange forward contracts ("forward contracts") to sell Euro and buy United States Dollars, with various maturity dates as noted in the table below.

Maturity Date	Notional Amount
March 2023	EUR 50,000
September 2024	EUR 50,000
April 2025	EUR 100,000
January 2028	EUR 100,000
Total	EUR 300,000

The forward contracts have been designated as a net investment hedge which is in place to hedge a portion of the company's net investment in subsidiaries with euro-denominated net assets. The change in the fair value of derivatives designated as, and effective as, net investment hedges will be recorded in "Accumulated other comprehensive loss" in the company's Consolidated Balance Sheets. Amounts excluded from the assessment of hedge effectiveness will be included in "Interest and other financing expense, net" in the company's Consolidated Statements of Operations.