XML 93 R75.htm IDEA: XBRL DOCUMENT v3.3.1.900
Retirement Benefits (Plan Target and Actual Asset Allocation) (Details)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Equity securities | All Pension Benefit Plans    
Defined Benefit Plan Disclosure [Line Items]    
Target Mix 37.00% 41.00%
Actual Mix 37.00% 43.00%
Equity securities | Postretirement Health Care Benefits Plan    
Defined Benefit Plan Disclosure [Line Items]    
Target Mix 36.00% 37.00%
Actual Mix 37.00% 20.00%
Fixed income securities | All Pension Benefit Plans    
Defined Benefit Plan Disclosure [Line Items]    
Target Mix 45.00% 44.00%
Actual Mix 44.00% 44.00%
Fixed income securities | Postretirement Health Care Benefits Plan    
Defined Benefit Plan Disclosure [Line Items]    
Target Mix 42.00% 42.00%
Actual Mix 41.00% 20.00%
Cash and other investments | All Pension Benefit Plans    
Defined Benefit Plan Disclosure [Line Items]    
Target Mix 18.00% 15.00%
Actual Mix 19.00% 13.00%
Cash and other investments | Postretirement Health Care Benefits Plan    
Defined Benefit Plan Disclosure [Line Items]    
Target Mix 22.00% 21.00%
Actual Mix 22.00% 60.00%