Restructuring Accrual - Changes in Restructuring Accrual (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Balance at beginning of period		$ 107.6
Accruals		51.5
Cash payments		(62.3)
Reversal of excess accrual		(5.6)
Balance at end of period	$ 21.4	91.2
Employee Terminations
Restructuring Reserve [Roll Forward]
Balance at beginning of period	43.7	101.3
Accruals	13.7	33.8
Cash payments	(36.0)	(51.3)
Reversal of excess accrual	0.0	(4.1)
Balance at end of period	21.4	79.7
Other Exit Costs
Restructuring Reserve [Roll Forward]
Balance at beginning of period	$ 22.8	6.3
Accruals		17.7
Cash payments		(11.0)
Reversal of excess accrual		(1.5)
Balance at end of period		$ 11.5