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Employee Benefit Plans (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended 12 Months Ended
Sep. 30, 2013
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Dec. 31, 2010
Jun. 30, 2013
Stock Options Granted After July 2008 [Member]
Jun. 30, 2013
Time Based Restricted Stock granted prior to Fiscal 2013 [Domain]
Jun. 30, 2013
Time Based Restricted Stock granted during Fiscal 2013 [Domain] [Domain]
Jun. 30, 2013
Performance Based Restricted Stock and Units [Domain]
Jun. 30, 2013
Employee Stock [Member]
Jun. 30, 2013
Stock Options Granted Prior To July Two Thousand Eight [Member]
Jun. 30, 2013
Non-Vested Stock Options [Member]
Jun. 30, 2013
Nonvested Restricted Stock Unit [Domain]
Jun. 30, 2013
Non-Vested Restricted Stock [Member]
Jun. 30, 2014
Net Actuarial And Other Loss Net Of Tax [Member]
Jun. 30, 2013
Net Actuarial And Other Loss Net Of Tax [Member]
Jun. 30, 2014
Transition Obligation Net Of Tax [Member]
Jun. 30, 2013
Transition Obligation Net Of Tax [Member]
Jun. 30, 2014
Prior Service Cost Net Of Tax [Member]
Jun. 30, 2013
Prior Service Cost Net Of Tax [Member]
Jun. 30, 2013
Minimum [Member]
Performance Based Restricted Stock and Units [Domain]
Jun. 30, 2013
Maximum [Member]
Performance Based Restricted Stock and Units [Domain]
Jun. 30, 2013
Fair Value, Inputs, Level 2 [Member]
Cash and Cash Equivalents [Member]
Jun. 30, 2012
Fair Value, Inputs, Level 2 [Member]
Cash and Cash Equivalents [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]                                                    
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax   $ 210.9   $ 273.1   $ 185.8                     $ 18.8 $ 311.2 $ 0.9 $ 4.9 $ 0.2 $ 0.6        
Vesting term options granted               4 years 5 years 2 years     5 years                   6 months 26 months    
Share Based Compensation Arrangement By Share Based Payment Award Performance Period                     1 year                              
Stock options - term for stock options granted, in years   10 years                                                
Purchase price of common stock as percentage of market value                       95.00%                            
Minimum percentage that will ultimately vest under performance-based restricted stock awards based on performance target                     0.00%                              
Maximum percentage that will ultimately vest under performance-based restricted stock awards based on performance target                     150.00%                              
Shares repurchased   10.4   14.6                                            
Stock-based compensation expense   96.4   94.1   90.3                                        
Total stock-based compensation - related tax benefits   34.3   33.5   32.3                                        
Total remaining unrecognized compensation cost                           9.7 18.2 63.8                    
Weighted-average remaining requisite vesting period                           2 years 1 year 3 months 18 days 1 year 4 months 7 days                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value   276.8   242.7                                            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term   4 years 7 months 6 days   3 years 5 months 1 day                                            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value   135.1   83.8   95.7                                        
Award requisite service period   3 years                                                
Defined Benefit Plan, Fair Value of Plan Assets   1,676.1   1,469.5   1,313.3                                     42.7 57.2
Defined Benefit Plan, Accumulated Benefit Obligation   1,412.8   1,399.9                                            
Defined Benefit Plan, Contributions by Employer 75.0 135.3   91.6                                            
Defined Benefit Plan, Measurement Date   June 30                                                
Expected future plan benefit payment - 2014   54.1                                                
Expected future plan benefit payment - 2015   60.5                                                
Expected future plan benefit payment - 2016   67.1                                                
Expected future plan benefit payment - 2017   77.0                                                
Expected future plan benefit payment - 2018   86.0                                                
Expected future plan benefit payment - 2019 to 2023   568.6                                                
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent   50.00%                                                
Highly Compensated Employee Contribution Percentage To Retirement And Saving Plan   12.00%                                                
Defined Contribution Plan, Cost Recognized     72.0   65.9   57.5                                      
Cash payments for Restricted Stock Units   $ 17.8   $ 15.4   $ 10.3