Share-Based Compensation and Benefit Plans (Stock Option Activity) (Details) (Stock Option [Member], USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock Option [Member]
Compensation expense for benefit plans	$ 17.8	$ 18.5	$ 17.6
Income tax benefit from compensation expense for benefit plans	6.8	7.1	6.8
Total intrinsic value of options exercised	95.8	113.6	71.5
Cash received from the exercise of stock options	$ 59.7	$ 54.9	$ 50.3
Weighted-average grant date fair value of options awarded	$ 29.98	$ 23.57	$ 16.93
Weighted-average remaining contractual life of options currently exercisable, years	4 years 9 months 9 days	5 years 1 month 16 days	5 years 1 month 13 days