Pension and Other Postretirement Benefits - Narrative (Details) - Pension Plans - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contributions	$ 4.7	$ 3.6
Expected contributions expected during the remainder of fiscal year	$ 15.0