Employee Benefit Plans (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Discontinued Operations Net Pension Expense	$ 4.3		$ 5.4		$ 6.1
Defined Benefit Plan, Curtailments	3.2		0.0
Discontinued Operation, Share-based Compensation Expense	5.5		$ 21.2		14.4
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Gains (Losses), after Tax	259.1
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost (Credit), after Tax	$ 2.7
Stock options - term for stock options granted, in years	10 years
Shares repurchased	18.2		9.0
Cash payments for Restricted Stock Units	$ 25.2		$ 1.2		17.8
Aggregate intrinsic value of stock options outstanding and exercisable	$ 152.6		$ 120.3
Weighted average remaining life of stock options outstanding and exercisable	6 years		4 years
Aggregate intrinsic value for options exercised	$ 125.3		$ 156.3		135.1
Award requisite service period	3 years
Additional estimated future contribution in fiscal 2015	$ 10.7
Fair Value of Plan Assets	2,009.8		2,024.1		$ 1,676.1
Defined Benefit Plan, Accumulated Benefit Obligation	1,645.4		1,581.9
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	0.2
Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year	10.4
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit)	0.5
Defined Benefit Plan, Contributions by Employer	9.9		84.7
Expected future plan benefit payment - 2016	71.9
Expected future plan benefit payment - 2017	78.1
Expected future plan benefit payment - 2018	86.2
Expected future plan benefit payment - 2019	93.4
Expected future plan benefit payment - 2020	101.2
Expected future plan benefit payment - 2021 to 2025	$ 630.2
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		$ 69.7		$ 66.0		$ 61.2
Defined Benefit Plan, Future Amortization of Transition Obligation (Asset)	$ 0.2
Stock Options Granted After July 2008 [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting term options granted	4 years
Time Based Restricted Stock granted prior to Fiscal 2013 [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting term options granted	5 years
Time Based Restricted Stock granted during Fiscal 2013 [Domain] [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting term options granted	2 years
Performance Based Restricted Stock and Units [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
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%
Employee Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Purchase price of common stock as percentage of market value	95.00%
Stock Options Granted Prior To July Two Thousand Eight [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting term options granted	5 years
Non-Vested Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	$ 14.6
Weighted-average remaining requisite vesting period	1 year 10 months 24 days
Nonvested Restricted Stock Unit [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	$ 17.3
Weighted-average remaining requisite vesting period	1 year 1 month 6 days
Non-Vested Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	$ 86.5
Weighted-average remaining requisite vesting period	1 year 4 months 24 days
Minimum [Member] | Performance Based Restricted Stock and Units [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Performance Period	1 year
Maximum [Member] | Performance Based Restricted Stock and Units [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting term options granted	26 months
Share Based Compensation Arrangement By Share Based Payment Award Performance Period	3 years
Fair Value, Inputs, Level 2 [Member] | Cash and Cash Equivalents [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Fair Value of Plan Assets	$ 185.4		$ 11.7