Stock Compensation Plans (Stock Option Activity Rollforward) (Details) - Stock options [Member] - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Stock Option Activity [Roll Forward]
Outstanding, beginning of year	6,040	9,370	12,887
Granted	0	0	0
Exercised	(498)	(904)	(1,422)
Forfeited	(1,919)	(2,426)	(2,095)
Outstanding, end of year	3,623	6,040	9,370
Options exercisable at year end	3,623	6,040	9,265
Weighted-average per share fair value of options granted during the year	$ 0	$ 0	$ 0
Outstanding, weighted-average per share exercise price, beginning of year	19	23	23
Granted, weighted-average per share exercise price	0	0	0
Exercised, weighted-average per share exercise price	12	12	11
Forfeited, weighted-average per share exercise price	34	37	29
Options outstanding, weighted-average per share exercise price, end of year	12	19	23
Options exercisable at year end, weighted-average per share exercise price	$ 12	$ 19	$ 23