Revenue - Schedule of Disaggregation of Revenue by Reporting Unit and Timing of Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Total net sales	$ 290.6	$ 545.8
U.S.
Total net sales	242.5	455.6
International
Total net sales	48.1	90.2
Capital Markets | U.S.
Total net sales	144.6	262.1
Investment Markets | U.S.
Total net sales	87.3	171.9
Language Solutions And Other | U.S.
Total net sales	10.6	21.6
Point in time
Total net sales	248.3	461.8
Point in time | U.S.
Total net sales	205.0	380.6
Point in time | International
Total net sales	43.3	81.2
Point in time | Capital Markets | U.S.
Total net sales	120.5	214.0
Point in time | Investment Markets | U.S.
Total net sales	73.9	145.0
Point in time | Language Solutions And Other | U.S.
Total net sales	10.6	21.6
Over time
Total net sales	42.3	84.0
Over time | U.S.
Total net sales	37.5	75.0
Over time | International
Total net sales	4.8	9.0
Over time | Capital Markets | U.S.
Total net sales	24.1	48.1
Over time | Investment Markets | U.S.
Total net sales	$ 13.4	$ 26.9