Stock Compensation Plans (Stock Option Activity Rollforward) (Details) (Stock options [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock options [Member]
Stock Option Activity [Roll Forward]
Outstanding, beginning of year	12,887	17,148	21,641
Granted	0	0	0
Exercised	(1,422)	(1,432)	(2,877)
Forfeited	(2,095)	(2,829)	(1,616)
Outstanding, end of year	9,370	12,887	17,148
Options exercisable at year end	9,265	12,402	15,719
Weighted-average per share fair value of options granted during the year	$ 0.00	$ 0.00	$ 0.00
Outstanding, weighted-average per share exercise price, beginning of year	$ 23	$ 22	$ 21
Granted, weighted-average per share exercise price	$ 0	$ 0	$ 0
Exercised, weighted-average per share exercise price	$ 11	$ 14	$ 11
Forfeited, weighted-average per share exercise price	$ 29	$ 25	$ 27
Options outstanding, weighted-average per share exercise price, end of year	$ 23	$ 23	$ 22
Options exercisable at year end, weighted-average per share exercise price	$ 23	$ 23	$ 23