Geographic Area and Services and Products Information - Summary of Net Sales for Services and Products (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Entity Wide Information Revenue From External Customer [Line Items]
Total net sales	$ 874.7	$ 963.0	$ 1,004.9
Services Net Sales
Entity Wide Information Revenue From External Customer [Line Items]
Total net sales	554.0	618.0	632.1
Services Net Sales | Capital Markets
Entity Wide Information Revenue From External Customer [Line Items]
Total net sales	395.8	408.3	396.7
Services Net Sales | Investment Markets
Entity Wide Information Revenue From External Customer [Line Items]
Total net sales	158.2	167.4	164.0
Services Net Sales | Language Solutions
Entity Wide Information Revenue From External Customer [Line Items]
Total net sales	0.0	42.3	71.4
Products Net Sales
Entity Wide Information Revenue From External Customer [Line Items]
Total net sales	320.7	345.0	372.8
Products Net Sales | Capital Markets
Entity Wide Information Revenue From External Customer [Line Items]
Total net sales	120.9	151.0	154.9
Products Net Sales | Investment Markets
Entity Wide Information Revenue From External Customer [Line Items]
Total net sales	$ 199.8	$ 194.0	$ 217.9