Revenue - Schedule of Disaggregation of Revenue by Reporting Unit and Timing of Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Total net sales	$ 216.9	$ 762.7
U.S.
Total net sales	185.5	641.1
International
Total net sales	31.4	121.6
Capital Markets | U.S.
Total net sales	102.5	364.6
Investment Markets | U.S.
Total net sales	81.8	262.8
Language Solutions | U.S.
Total net sales	1.2	13.7
Point in time
Total net sales	176.1	637.9
Point in time | U.S.
Total net sales	149.4	530.0
Point in time | International
Total net sales	26.7	107.9
Point in time | Capital Markets | U.S.
Total net sales	78.1	292.1
Point in time | Investment Markets | U.S.
Total net sales	70.1	224.2
Point in time | Language Solutions | U.S.
Total net sales	1.2	13.7
Over time
Total net sales	40.8	124.8
Over time | U.S.
Total net sales	36.1	111.1
Over time | International
Total net sales	4.7	13.7
Over time | Capital Markets | U.S.
Total net sales	24.4	72.5
Over time | Investment Markets | U.S.
Total net sales	$ 11.7	$ 38.6