Interim Financial Data by Segment - Segment Results (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenues	$ 953.4	$ 1,012.8	$ 1,926.2	$ 1,937.6
Earnings (Loss) before Income Taxes	64.3	103.5	153.6	177.8
Investor Communication Solutions
Segment Reporting Information [Line Items]
Revenues	738.1		1,503.9
Operating Segments | Investor Communication Solutions
Segment Reporting Information [Line Items]
Revenues	738.1	802.2	1,503.9	1,528.6
Earnings (Loss) before Income Taxes	37.0	72.4	96.0	118.0
Operating Segments | Global Technology and Operations
Segment Reporting Information [Line Items]
Revenues	236.6	228.0	464.3	442.9
Earnings (Loss) before Income Taxes	47.3	50.6	93.7	95.7
Other
Segment Reporting Information [Line Items]
Earnings (Loss) before Income Taxes	(27.9)	(26.5)	(51.0)	(48.0)
Foreign currency exchange
Segment Reporting Information [Line Items]
Revenues		17.4	42.0	33.9
Earnings (Loss) before Income Taxes	$ 7.9	$ 7.0	$ 15.0	$ 12.1