Stock-Based Compensation Plans (Details 6) (USD $)	12 Months Ended
	Dec. 31, 2014
Summary of options outstanding by plan and range of exercise price
Shares	1,439,145
Weighted Average Exercise Price (in dollars per share)	$ 44.83
Remaining Contractual Life	3 years 2 months 23 days
$28.42-$37.74
Summary of options outstanding by plan and range of exercise price
Options outstanding, Exercise Prices, Lower limit (in dollars per share)	$ 28.42
Options outstanding, Exercise Prices, Upper limit (in dollars per share)	$ 37.74
Shares	491,245
Weighted Average Exercise Price (in dollars per share)	$ 35.23
Remaining Contractual Life	3 years 11 months 23 days
$37.75-$53.08
Summary of options outstanding by plan and range of exercise price
Options outstanding, Exercise Prices, Lower limit (in dollars per share)	$ 37.75
Options outstanding, Exercise Prices, Upper limit (in dollars per share)	$ 53.08
Shares	667,458
Weighted Average Exercise Price (in dollars per share)	$ 37.87
Remaining Contractual Life	5 years 9 months 15 days
$53.09-$81.19
Summary of options outstanding by plan and range of exercise price
Options outstanding, Exercise Prices, Lower limit (in dollars per share)	$ 53.09
Options outstanding, Exercise Prices, Upper limit (in dollars per share)	$ 81.19
Shares	280,442
Weighted Average Exercise Price (in dollars per share)	$ 78.23
Remaining Contractual Life	2 years 10 months 24 days