Employee Retirement Benefit Plans-Fair Value (Details) - USD ($) $ in Millions	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 244.6	$ 227.6
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	222.8	206.3
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20.1	19.6
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	56.0	53.7
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	56.0	53.7
Equity Securities [Member] | Level 3 [Member]
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	96.5	96.1
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	96.5	96.1
Debt Securities [Member] | Level 3 [Member]
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	6.2	5.8
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	4.5	4.1
Real Estate [Member] | Level 3 [Member]
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	85.9	72.0
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	65.8	52.4
Other Assets [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20.1	19.6
Other [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	36.6
Accounting Standards Update 2015-07 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	1.7
Accounting Standards Update 2015-07 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Accounting Standards Update 2015-07 [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Accounting Standards Update 2015-07 [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1.7	1.7
Accounting Standards Update 2015-07 [Member] | Other Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0.0	$ 0.0