Financial instruments and concentration of credit risks (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value of Foreign Exchange Forward Contracts by Balance Sheet Location

The following table summarizes the fair value of the company’s foreign exchange forward contracts as of December 31, 2019 and 2018.

As of December 31,	2019		2018
Balance Sheet Location
Prepaid expenses and other current assets	$	2.1	$	3.4
Other accrued liabilities	0.1		0.3
Total fair value	$	2.0	$	3.1

Gains and Losses Recognized on Foreign Exchange Forward Contracts

The following table summarizes the location and amount of gains and losses recognized on foreign exchange forward contracts

for the three years ended December 31, 2019.

Year Ended December 31,	2019		2018			2017
Statement of Income Location
Other income (expense), net	$	1.7	$	(14.2	)	$	27.5