Employee Benefits - Contributions to Employee Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Apr. 01, 2017	Apr. 02, 2016	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Restructuring charges	$ 142	$ 52
Employer contributions to employee benefit plans	24	17	$ 33
Total current year projected employer contributions	42
Pension
Defined Benefit Plan Disclosure [Line Items]
Employer contributions to employee benefit plans	21	13	18
Total current year projected employer contributions	26
Nonpension postretirement
Defined Benefit Plan Disclosure [Line Items]
Employer contributions to employee benefit plans	3	4	$ 15
Total current year projected employer contributions	16
Employee related costs
Defined Benefit Plan Disclosure [Line Items]
Restructuring charges	111	$ 14
Employee related costs | Multiemployer Plans
Defined Benefit Plan Disclosure [Line Items]
Restructuring charges	$ 26
Cash Obligation Period	20 years