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Stock Compensation Plans (Restricted Stock, RSUs and Performance Shares Activity Rollforward) (Details) - Restricted Stock, Performance Shares, and Restricted Stock Units (RSUs) [Member] - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Restricted Stock, RSUs and Performance Shares Activity [Roll Forward]      
Outstanding, beginning of year 2,890 3,211 3,822
Granted 932 974 806
Vested (1,090) (1,019) (1,391)
Forfeited (156) (276) (26)
Outstanding, end of year 2,576 2,890 3,211
Vested, end of year 89 75 60
Outstanding, beginning of year, weighted-average per share grant date fair value $ 15 $ 11 $ 9
Granted, weighted-average per share grant date fair value 22 19 21
Vested, weighted-average per share grant date fair value 10 10 11
Forfeited, weighted-average per share grant date fair value 19 15 15
Outstanding, end of year, weighted-average per share grant date fair value 18 15 11
Vested, end of year, weighted-average per share grant date fair value $ 14 $ 13 $ 12