Stock Compensation Plans (Weighted-average remaining contractual lives of stock options outstanding) (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2016 $ / shares shares
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding - number outstanding | shares	3,623
Options outstanding - weighted average per share exercise price	$ 12
Options exercisable - number exercisable | shares	3,623
Options exercisable - weighted average per share exercise price	$ 12
Weighted average remaining contractual term	2 years 7 months
$0.01 to $10.00 [Member]
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding - number outstanding | shares	320
Options outstanding - weighted average per share exercise price	$ 8
Options exercisable - number exercisable | shares	320
Options exercisable - weighted average per share exercise price	$ 8
Exercise price range, lower range limit	0.01
Exercise price range, upper range limit	$ 10.00
Weighted average remaining contractual term	3 years 10 months
$10.01 to $20.00 [Member]
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding - number outstanding | shares	3,205
Options outstanding - weighted average per share exercise price	$ 12
Options exercisable - number exercisable | shares	3,205
Options exercisable - weighted average per share exercise price	$ 12
Exercise price range, lower range limit	10.01
Exercise price range, upper range limit	$ 20.00
Weighted average remaining contractual term	2 years 6 months
$20.01 to $30.00 [Member]
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding - number outstanding | shares	82
Options outstanding - weighted average per share exercise price	$ 27
Options exercisable - number exercisable | shares	82
Options exercisable - weighted average per share exercise price	$ 27
Exercise price range, lower range limit	20.01
Exercise price range, upper range limit	$ 30.00
Weighted average remaining contractual term	5 months
$30.01 to $40.00 [Member]
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding - number outstanding | shares	16
Options outstanding - weighted average per share exercise price	$ 35
Options exercisable - number exercisable | shares	16
Options exercisable - weighted average per share exercise price	$ 35
Exercise price range, lower range limit	30.01
Exercise price range, upper range limit	$ 40.00
Weighted average remaining contractual term	1 month
$40.01 to $45.00 [Member]
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	$ 40.01
Exercise price range, upper range limit	$ 45.00