Stock-Based Compensation (Textuals) (Details) (USD $)	12 Months Ended										12 Months Ended																				12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Stock Options [Member]	Dec. 31, 2012 Stock Options [Member]	Dec. 31, 2011 Stock Options [Member]	Dec. 31, 2013 Stock Appreciation Rights (SARs) [Member]	Dec. 31, 2012 Stock Appreciation Rights (SARs) [Member]	Dec. 31, 2011 Stock Appreciation Rights (SARs) [Member]	Dec. 31, 2010 Stock Appreciation Rights (SARs) [Member]	Dec. 31, 2013 Award Types Other than Stock Options and Stock Appreciation Rights [Member]	Dec. 31, 2013 Performance-Vesting Shares [Member]	Dec. 31, 2012 Performance-Vesting Shares [Member]	Dec. 31, 2011 Performance-Vesting Shares [Member]	Dec. 31, 2013 Employee Stock Purchase Plan (ESPP) [Member]	Dec. 31, 2012 Employee Stock Purchase Plan (ESPP) [Member]	Dec. 31, 2011 Employee Stock Purchase Plan (ESPP) [Member]	Dec. 31, 2013 Annual Incentive Plan [Member]	Dec. 31, 2012 Annual Incentive Plan [Member]	Dec. 31, 2011 Annual Incentive Plan [Member]	Dec. 31, 2013 Performance-Vesting Units [Member]	Dec. 31, 2012 Performance-Vesting Units [Member]	Dec. 31, 2011 Performance-Vesting Units [Member]	Dec. 31, 2011 President and Chief Operating Officer [Member] Stock Options [Member]	Dec. 31, 2011 President and Chief Operating Officer [Member] Performance-Vesting Shares [Member]	Dec. 31, 2013 Minimum [Member] Performance-Vesting Shares [Member]	Dec. 31, 2013 Minimum [Member] Performance-Vesting Units [Member]	Dec. 31, 2013 Maximum [Member] Performance-Vesting Shares [Member]	Dec. 31, 2013 Maximum [Member] Performance-Vesting Units [Member]	Dec. 31, 2013 Deferred Compensation Plans [Member] plan	Dec. 31, 2013 Deferred Compensation Plans [Member] Non-Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant/issuance	5,286,868														4,200,000
Number of shares reduced for each award granted				1			1				2.35
Stock compensation expense	$ 21,200,000	$ 15,500,000	$ 8,400,000									$ 6,500,000	$ 6,000,000	$ 3,000,000	$ 400,000	$ 400,000	$ 300,000				$ 2,400,000	$ 900,000	$ 200,000	$ 800,000	$ 700,000
Unrecognized compensation expense for all nonveste awards	18,700,000
Weighted average period the amount of unrecognized compensation expense is expected to be recognized	1 year 6 months 30 days
Vesting period				4 years			4 years											4 years
Awards, expiration period				10 years			10 years
Weighted average remaining contractual life of options outstanding	6 years 9 months 0 days
Weighted average remaining contratual life of options exercisable	5 years 3 months 0 days
Aggregate intrinsic value of total options outstanding	128,700,000
Aggregate intrinsic value of total options vested	67,600,000
Risk-free interest rate				0.90%	0.90%	2.20%
Stock volatility				22.50%	23.30%	24.30%
Dividend yield				1.30%	1.70%	1.70%
Expected life				6 years	6 years	6 years
Weighted average grant date fair value of options granted	$ 5.73	$ 4.01	$ 4.38
Intrinsic value of options exercised	27,300,000	16,900,000	10,700,000
Grant date fair value of options vested	4,000,000	3,800,000	4,000,000
Actual payout range																										0.00%	0.00%	200.00%	200.00%
Weighted average grant date fair value, granted in period	$ 29.56	$ 21.22	$ 20.56									$ 29.67	$ 21.33	$ 20.43				$ 29.56	$ 21.22	$ 20.43											$ 32.46
Number of shares to be issued upon conversion												731,007
Average remaining term of shares issued at conversion												1 year 0 months 0 days
Percentage of current market price for sales to eligible employees															85.00%
Limitation on payroll deductions of employee's base salary, percent															25.00%
Limitation on payroll deductions of employee's base salary, amount															$ 25,000
Maximum number of shares per employee															2,000
Maximum number of shares per employee, per year															8,000
Purchases of shares															84,675	103,010	110,776
Number of deferred compensation plans																														2
Number of deferred stock units																														581,058
Award granted for every bonus shares issued																		0.25
Grants												175,498	209,680	202,198				5,300	2,800	3,800	25,538	27,100	26,884								36,054
Forfeitures												15,088	10,042	20,398				200	800	2,800	0	0	3,436
Number of shares converted from cash to stock-settled	324,920
Cash-Settled SARs, Outstanding	104,790
Stock-Settled SARs, Outstanding	270,314
SARs outstanding							375,104	389,686	320,336	222,096
Number of deferred stock units payable in cash																														24,296