Pension and Other Postretirement Benefits - Narrative (Details) - Pension Plans - Qualified Plan - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contributions	$ 2.9	$ 2.4
Expected contributions expected during the remainder of fiscal year	$ 16.4