Stock-Based Compensation Plans (Details 6) (USD $)	12 Months Ended
	Dec. 31, 2012
Summary of options outstanding by plan and range of exercise price
Shares	2,910,269
Weighted Average Exercise Price	$ 40.33
Remaining Contractual Life	3 years 10 months 2 days
$20.02-$28.42
Summary of options outstanding by plan and range of exercise price
Options outstanding, Exercise Prices, Lower limit	$ 20.02
Options outstanding, Exercise Prices, Upper limit	$ 28.42
Shares	136,202
Weighted Average Exercise Price	$ 21.49
Remaining Contractual Life	1 year 3 months 15 days
$28.43-$35.45
Summary of options outstanding by plan and range of exercise price
Options outstanding, Exercise Prices, Lower limit	$ 28.43
Options outstanding, Exercise Prices, Upper limit	$ 35.45
Shares	851,948
Weighted Average Exercise Price	$ 33.04
Remaining Contractual Life	3 years 6 months 22 days
$35.46-$79.11
Summary of options outstanding by plan and range of exercise price
Options outstanding, Exercise Prices, Lower limit	$ 35.46
Options outstanding, Exercise Prices, Upper limit	$ 79.11
Shares	1,657,150
Weighted Average Exercise Price	$ 39.23
Remaining Contractual Life	4 years 0 months 15 days
$79.12-$81.19
Summary of options outstanding by plan and range of exercise price
Options outstanding, Exercise Prices, Lower limit	$ 79.12
Options outstanding, Exercise Prices, Upper limit	$ 81.19
Shares	264,969
Weighted Average Exercise Price	$ 80.47
Remaining Contractual Life	4 years 9 months 18 days