Share-Based Employee Compensation Plans and Other Compensation and Benefit Plans (Stock Option Activity) (Details) (Stock Option [Member], USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock Option [Member]
Compensation expense for benefit plans	$ 18,500,000	$ 17,600,000	$ 14,900,000
Income tax benefit from compensation expense for benefit plans	7,100,000	6,800,000	5,700,000
Total intrinsic value of options exercised	113,600,000	71,500,000	60,000,000
Cash received from the exercise of stock options	$ 54,900,000	$ 50,300,000	$ 56,900,000
Weighted-average grant date fair value of options awarded	$ 23.57	$ 16.93	$ 14.24
Weighted-average remaining contractual life of options currently exercisable, years	5 years 1 month 16 days	5 years 1 month 13 days	5 years 2 months 16 days