Employee Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Gains (Losses), after Tax	$ 189.4
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost (Credit), after Tax	4.2
Stock options - term for stock options granted, in years	10 years
Shares repurchased	9.0		10.4
Cash payments for Restricted Stock Units	1.2		17.8		15.4
Aggregate intrinsic value of stock options outstanding and exercisable	216.9		185.1
Weighted average remaining life of stock options outstanding and exercisable	5 years 4 months 17 days		3 years 4 months 18 days
Aggregate intrinsic value for options exercised	156.3		135.1		83.8
Award requisite service period	3 years
Additional estimated future contribution in fiscal 2015	9.5
Fair Value of Plan Assets	2,024.1		1,676.1		1,469.5
Defined Benefit Plan, Accumulated Benefit Obligation	1,581.9		1,412.8
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	0.3
Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year	16.3
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit)	0.9
Defined Benefit Plan, Contributions by Employer	84.7		135.3
Defined Benefit Plan, Measurement Date	June 30
Expected future plan benefit payment - 2015	61.3
Expected future plan benefit payment - 2016	66.9
Expected future plan benefit payment - 2017	76.5
Expected future plan benefit payment - 2018	85.6
Expected future plan benefit payment - 2019	93.8
Expected future plan benefit payment - 2020 to 2024	609.4
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		77.6		72.0		65.9
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	16.8
Weighted-average remaining requisite vesting period	2 years 0 months 20 days
Nonvested Restricted Stock Unit [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	26.7
Weighted-average remaining requisite vesting period	1 year 3 months 16 days
Non-Vested Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	89.9
Weighted-average remaining requisite vesting period	1 year 3 months 14 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	$ 11.7		$ 42.7