Recent Accounting Pronouncements - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Jul. 01, 2018	Jun. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of goods sold	$ (449.5)	$ (402.1)	$ (930.2)	$ (796.2)
Reclassification from selling, general and administrative expense	(51.6)	(44.3)	(98.3)	(87.7)
Reclassification to other expense	$ 3.2	0.4	$ 1.7	0.2
Cumulative adjustment upon adoption of ASU 2017-12						$ 0.0
Reinvested Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment upon adoption of ASU 2017-12						$ 1.0
Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of goods sold				0.1
Reclassification from selling, general and administrative expense		0.6		1.1
Reclassification to other expense		$ 0.6		$ 1.1
Accounting Standards Update 2017-12 | Reinvested Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment upon adoption of ASU 2017-12					$ 1.0