Fair Value Measurements and Fair Value of Financial Instruments Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - Contingent Consideration [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 54	$ 37	$ 55	$ 37
Acquisitions (including assumed balances)		24		24
Payments	(1)		(2)
Change in fair value included in earnings		(3)		(3)
Ending Balance	$ 53	$ 58	$ 53	$ 58