Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan contribution from Pfizer Inc.	$ 10	$ 13
Pension and other postretirement benefit expense	14	15	$ 14
Actuarial losses	21	22
Actuarial losses, net of tax	13	14
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	7	7	9
Interest cost	3	3	3
Expected return on plan assets	(3)	(3)	(3)
Amortization of net (gains) / losses	1	1	1
Settlement and curtailments (gains) / losses	(1)	1	(2)
Net periodic benefit cost	7	9	8
Company contributions	5	6
Contribution expense	$ 43	38	40
Matching percentage	100.00%
Maximum matching percentage	5.00%
Additional contribution percentage, minimum	0.00%
Additional contribution percentage, maximum	8.00%
Other Pension Plan, Postretirement or Supplemental Plans
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Contribution expense	$ 2	7
Netherlands
Defined Benefit Plan Disclosure [Line Items]
Period of amortization	12 years 3 months
Domestic Plan
Defined Benefit Plan Disclosure [Line Items]
Total cost of service credit continuation	$ 38
Installment period	10 years
Pension and other postretirement benefit expense	$ 6	6
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
2019	4
Postretirement benefit expense	4	$ 4	$ 4
Domestic Plan | Pfizer
Defined Benefit Plan Disclosure [Line Items]
Remaining total cost	25
Foreign Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Expected contribution in 2019	5
2019	3
2020	4
2021	3
2022	5
2023	5
Thereafter	$ 31