Leases - Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Other assets	$ 527	$ 521
Other accruals	137	137
Other liabilities	451	476
Total operating lease liabilities	$ 588	$ 613
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets	Other assets
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other accruals	Other accruals
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities