Employee Benefit Plans (Investments Of The Plan Measured At Fair Value) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments	$ 1,469.5	$ 1,313.3	$ 981.7
Cash And Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments	57.2	22.0
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments	269.6	283.4
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Total Pension Assets Excluding Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments	269.6	283.4
Significant Other Observable Inputs (Level 2) [Member] | Comingled Trusts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments	583.5	529.7
Significant Other Observable Inputs (Level 2) [Member] | U.S. Government Agencies [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments	272.5	207.4
Significant Other Observable Inputs (Level 2) [Member] | Corporate And Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments	272.8	237.7
Significant Other Observable Inputs (Level 2) [Member] | Mortgage-Backed Security Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments	13.9	33.1
Significant Other Observable Inputs (Level 2) [Member] | Total Pension Assets Excluding Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments	1,142.7	1,007.9
Significant Unobservable Inputs (Level 3) [Member] | Comingled Trusts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments
Significant Unobservable Inputs (Level 3) [Member] | U.S. Government Agencies [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments
Significant Unobservable Inputs (Level 3) [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments
Significant Unobservable Inputs (Level 3) [Member] | Corporate And Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments
Significant Unobservable Inputs (Level 3) [Member] | Mortgage-Backed Security Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments
Significant Unobservable Inputs (Level 3) [Member] | Total Pension Assets Excluding Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments
Total [Member] | Comingled Trusts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments	583.5	529.7
Total [Member] | U.S. Government Agencies [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments	272.5	207.4
Total [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments	269.6	283.4
Total [Member] | Corporate And Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments	272.8	237.7
Total [Member] | Mortgage-Backed Security Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments	13.9	33.1
Total [Member] | Total Pension Assets Excluding Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of the plan investments	$ 1,412.3	$ 1,291.3