Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan contribution from Pfizer Inc.	$ 3	$ 5
Pension and other postretirement benefit expense	14	14	$ 13
Actuarial losses	21	32
Actuarial losses, net of tax	16	22
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	8	8	6
Interest cost	2	2	3
Expected return on plan assets	(3)	(3)	(3)
Amortization of net losses	1	2	1
Net periodic benefit cost	8	9	7
Company contributions	5	5
Contribution expense	$ 54	48	46
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]
2020	$ 5
Contribution expense	12	11
Defined Benefit Plan, Expected Future Benefit Payment, Thereafter	46
United States
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]
2020	4
2021	4
2022	4
Postretirement benefit expense	4	$ 4	$ 4
United States | Pfizer
Defined Benefit Plan Disclosure [Line Items]
Remaining total cost	$ 25
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Period of amortization	10 years 6 months
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Expected contribution in 2020	$ 5
2020	5
2021	3
2022	6
2023	6
2024	11
Thereafter	$ 50