Litigation (Details) $ in Millions	9 Months Ended
	Sep. 29, 2019 USD ($) individual	Dec. 31, 2018 USD ($)
Loss Contingencies [Line Items]
Accrued potential and legal fees	$ 85	$ 123
Insurance reimbursements	50	$ 65
Insurance reimbursement of claims potential maximum exposure	$ 109
Number of birth defect individuals | individual	24
Minimum
Loss Contingencies [Line Items]
Range of possible loss	$ 0
Maximum
Loss Contingencies [Line Items]
Range of possible loss	$ 122