Employee Retirement Benefit Plans-Fair Value (Details) - USD ($) $ in Millions	Jun. 30, 2022	Jun. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 240.0	$ 318.0
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	213.0	295.0
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27.0	23.0
Fair Value Measured at Net Asset Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10.0	14.0
Equity Securities [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Equity Securities [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10.0	14.0
Equity Securities [Member] \| Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Equity Securities [Member] \| Fair Value Measured at Net Asset Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	129.0	164.0
Debt Securities [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Debt Securities [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	129.0	164.0
Debt Securities [Member] \| Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Debt Securities [Member] \| Fair Value Measured at Net Asset Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12.0	11.0
Real Estate [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Real Estate [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10.0	11.0
Real Estate [Member] \| Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2.0	0.0
Real Estate [Member] \| Fair Value Measured at Net Asset Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Other Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	89.0	129.0
Other Assets [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Other Assets [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	64.0	106.0
Other Assets [Member] \| Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	25.0	23.0
Other Assets [Member] \| Fair Value Measured at Net Asset Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Hedge Funds [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 35.0	$ 62.0