Income Taxes - Unrecognized Tax Benefits (Details) $ in Millions	9 Months Ended
	Oct. 01, 2016 USD ($)
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Balance at beginning of year	$ 350
Additions due to acquisitions	51
Balance at end of year	458
Tax planning related to prior years that resulted in amended returns [Member]
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Additions for tax positions of prior years	43
Utilization of Deferred Tax Assets [Member]
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Additions for tax positions of prior years	$ 14