Employee Retirement Benefit Plans-Level 3 (Details) - Level 3 [Member] $ in Millions	12 Months Ended
	Jun. 30, 2020 USD ($)
Employer contributions between measurement date and reporting date
Beginning balance	$ 21.0
Relating to assets still held at the reporting date	0.9
Relating to assets sold during the period	0.0
Purchases, sales, settlements, contributions and benefits paid	(1.7)
Transfers in and/or out of Level 3	0.9
Ending balance	21.1
Insurance Contracts [Member]
Employer contributions between measurement date and reporting date
Beginning balance	3.1
Relating to assets still held at the reporting date	0.3
Relating to assets sold during the period	0.0
Purchases, sales, settlements, contributions and benefits paid	(0.1)
Transfers in and/or out of Level 3	0.0
Ending balance	3.3
Other Unobservable Assets [Member]
Employer contributions between measurement date and reporting date
Beginning balance	17.9
Relating to assets still held at the reporting date	0.6
Relating to assets sold during the period	0.0
Purchases, sales, settlements, contributions and benefits paid	(1.6)
Transfers in and/or out of Level 3	0.9
Ending balance	$ 17.8