Leases Lessee arrangements - Supplemental balance sheet information related to leases (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Operating leases in supplement balance sheet
Other assets	$ 625	$ 603
Other current liabilities	158	163
Other liabilities	$ 484	$ 457
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other current liabilities	Other current liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Operating lease weighted average remaining lease term	7 years	7 years
Operating lease weighted average discount rate	2.00%	2.00%