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Compensation and Benefit Plans (Weighted Average Assumptions) (Details)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Postretirement Benefits Other Than Pensions      
Assumed health care cost trend rates:      
Ultimate rate 5.00% 5.00%  
Year ultimate rate reached 2022 2021  
Pension Plans      
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rate 3.85% 4.50% 4.13%
Rate of compensation increase 4.00% 4.00% 4.50%
Expected long-term return on plan assets 7.00% 7.00% 7.00%
Continuing Operations | Postretirement Benefits Other Than Pensions      
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rate 4.16% 5.00% 4.25%
Expected long-term return on plan assets 5.50% 5.50% 6.70%
Assumed health care cost trend rates:      
Current year 7.75% 7.75% 8.50%
Ultimate rate 5.00% 5.00% 5.00%
Year ultimate rate reached 2021 2020 2020