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Asset Impairment, Exit and Implementation Costs (Facilities Consolidation) (Details) - Facilities Consolidation [Member] - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Oct. 27, 2016
Dec. 31, 2016
Dec. 31, 2017
Scenario, Forecast [Member]      
Restructuring Cost and Reserve [Line Items]      
Portion of expected restructuring charges to be recorded   $ 60 $ 75
Portion of expected restructuring charges to be recorded (usd per share)   $ 0.02  
Subsequent Event [Member]      
Restructuring Cost and Reserve [Line Items]      
Annualized costs savings $ 50    
Expected restructuring charges $ 150    
Expected restructuring charges, per share (usd per share) $ 0.05    
Charges expected to result in cash expenditures $ 90    
Subsequent Event [Member] | Accelerated Depreciation [Member]      
Restructuring Cost and Reserve [Line Items]      
Expected restructuring charges 55    
Subsequent Event [Member] | Employee Separation Costs [Member]      
Restructuring Cost and Reserve [Line Items]      
Expected restructuring charges 45    
Subsequent Event [Member] | Other Restructuring [Member]      
Restructuring Cost and Reserve [Line Items]      
Expected restructuring charges $ 50