Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 60	$ 60	$ 58
Operating lease payments	53	52
ROU assets obtained in exchange for operating lease liabilities	$ 34	$ 55
Weighted average lease term of operating leases	7 years 10 months 6 days	7 years 6 months
Weighted average discount rate of operating leases (as a percent)	2.60%	2.80%
Minimum
Lessee, Lease, Description [Line Items]
Period to terminate lease (less than)	1 year
Maximum
Lessee, Lease, Description [Line Items]
Period to extend lease	23 years