Long-Term Equity Compensation (Details) (USD $)	12 Months Ended													0 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Restricted Stock Units and Performance Stock Units [Member]	Dec. 31, 2012 Restricted Stock Units and Performance Stock Units [Member]	Dec. 31, 2011 Restricted Stock Units and Performance Stock Units [Member]	Dec. 31, 2013 Performance Share Awards [Member] Minimum [Member]	Dec. 31, 2013 Performance Share Awards [Member] Maximum [Member]	Dec. 31, 2013 Stock Options [Member]	Dec. 31, 2012 Stock Options [Member]	Dec. 31, 2011 Stock Options [Member]	Dec. 31, 2013 Stock Options [Member] Minimum [Member]	Dec. 31, 2013 Stock Options [Member] Maximum [Member]	May 21, 2009 Stock Options Before May 21, 2009 [Member]	May 21, 2009 2006 Long Term Incentive Plan [Member] Restricted Stock Units and Performance Stock Units [Member]	Dec. 31, 2013 2006 Long Term Incentive Plan [Member] Restricted Stock Units and Performance Stock Units [Member]	Dec. 31, 2013 2006 Long Term Incentive Plan [Member] Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 29,930,000	$ 28,893,000	$ 27,602,000	$ 26,200,000	$ 23,500,000	$ 21,400,000			$ 3,700,000	$ 5,400,000	$ 6,200,000
Tax benefit recognized for share-based compensation arrangements	$ 11,600,000	$ 11,200,000	$ 10,700,000
Reduction of shares available for grant															2	1.75	1
Stock option grants, term									7 years					10 years
Vesting period												1 year	4 years
Vesting percentage of shares granted							0.00%	100.00%
Shares reserved for issuance under Plans	7,200,000
Shares used to satisfy tax withholding and exercise price obligations	600,000