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Equity Incentive Programs (Stock Options Narrative) (Details) - USD ($)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Estimated future compensation expense $ 27,000,000  
Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Award vesting period 4 years  
Options granted (in shares) 0 0
Compensation expense $ 0 $ 0
Estimated future compensation expense $ 0  
Annual Anniversary Grant Date of Award [Member] | Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Earliest expiration period of award after event 10 years  
Termination for Death [Member] | Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Earliest expiration period of award after event 24 months  
Termination for Retirement or Disability [Member] | Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Earliest expiration period of award after event 36 months  
Employment Terminated, Any Other Reason [Member] | Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Earliest expiration period of award after event 90 days  
Vested in the first year [Member] | Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Percentage of options vested 0.00%  
Vested in the second year [Member] | Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Percentage of options vested 33.33%  
Vested in third year [Member] | Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Percentage of options vested 33.33%  
Vested in fourth year [Member] | Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Percentage of options vested 33.33%