Stock Compensation Plans (Weighted-average remaining contractual lives of stock options outstanding) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding - number outstanding	9,370
Options outstanding - weighted average per share exercise price	$ 23
Options exercisable - number exercisable	9,265
Options exercisable - weighted average per share exercise price	$ 23
Weighted average remaining contractual term	3 years
$0.01 to $11.00 [Member]
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding - number outstanding	907
Options outstanding - weighted average per share exercise price	$ 10
Options exercisable - number exercisable	802
Options exercisable - weighted average per share exercise price	$ 10
Exercise price range, lower range limit	$ 0.01
Exercise price range, upper range limit	$ 11.00
Weighted average remaining contractual term	4 years
$11.01 to $18.00 [Member]
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding - number outstanding	4,003
Options outstanding - weighted average per share exercise price	$ 12
Options exercisable - number exercisable	4,003
Options exercisable - weighted average per share exercise price	$ 12
Exercise price range, lower range limit	$ 11.01
Exercise price range, upper range limit	$ 18.00
Weighted average remaining contractual term	4 years 7 months 6 days
$18.01 to $25.00 [Member]
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding - number outstanding	417
Options outstanding - weighted average per share exercise price	$ 23
Options exercisable - number exercisable	417
Options exercisable - weighted average per share exercise price	$ 23
Exercise price range, lower range limit	$ 18.01
Exercise price range, upper range limit	$ 25.00
Weighted average remaining contractual term	3 months 18 days
$25.01 to $35.00 [Member]
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding - number outstanding	1,997
Options outstanding - weighted average per share exercise price	$ 34
Options exercisable - number exercisable	1,997
Options exercisable - weighted average per share exercise price	$ 34
Exercise price range, lower range limit	$ 25.01
Exercise price range, upper range limit	$ 35.00
Weighted average remaining contractual term	1 year 10 months 24 days
$35.01 to $45.00 [Member]
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding - number outstanding	2,046
Options outstanding - weighted average per share exercise price	$ 40
Options exercisable - number exercisable	2,046
Options exercisable - weighted average per share exercise price	$ 40
Exercise price range, lower range limit	$ 35.01
Exercise price range, upper range limit	$ 45.00
Weighted average remaining contractual term	0 years 10 months 24 days