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Severance and Facility Closure Costs (Detail)
$ in Millions
3 Months Ended
Apr. 01, 2017
USD ($)
Restructuring Cost and Reserve [Line Items]  
Beginning Balance $ 89
Charges Incurred 11
Cash Payments (31)
Lease Accretion and Other Adjustments 1
Ending Balance 70
Termination benefits | Merger related accruals  
Restructuring Cost and Reserve [Line Items]  
Beginning Balance 5
Cash Payments (1)
Ending Balance 4
Termination benefits | Comprehensive Business Review  
Restructuring Cost and Reserve [Line Items]  
Beginning Balance 8
Charges Incurred 9
Cash Payments (12)
Ending Balance 5
Lease and contract obligations, accruals for facilities closures and other costs | Merger related accruals  
Restructuring Cost and Reserve [Line Items]  
Beginning Balance 40
Charges Incurred 3
Cash Payments (11)
Ending Balance 32
Lease and contract obligations, accruals for facilities closures and other costs | Comprehensive Business Review  
Restructuring Cost and Reserve [Line Items]  
Beginning Balance 13
Charges Incurred (1)
Cash Payments (4)
Ending Balance 8
Lease and contract obligations, accruals for facilities closures and other costs | Other restructuring accruals  
Restructuring Cost and Reserve [Line Items]  
Beginning Balance 5
Cash Payments (1)
Ending Balance 4
Lease and contract obligations, accruals for facilities closures and other costs | Acquired entity accruals  
Restructuring Cost and Reserve [Line Items]  
Beginning Balance 18
Cash Payments (2)
Lease Accretion and Other Adjustments 1
Ending Balance $ 17