Leases - EGTS - Schedule of Operating and Finance Lease (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Right-of-use assets:
Operating leases	$ 545	$ 524
Total right-of-use assets	$ 963	$ 972
Operating lease right-of-use asset, statement of financial position	Other assets	Other assets
Lease liabilities:
Operating leases	$ 605	$ 577
Total lease liabilities	$ 1,037	$ 1,040
Operating lease liability, statement of financial position	Other current liabilities, Other long-term liabilities	Other current liabilities, Other long-term liabilities
EGTS
Right-of-use assets:
Operating leases	$ 19	$ 20
Total right-of-use assets	$ 19	$ 20
Operating lease right-of-use asset, statement of financial position	Other assets	Other assets
Lease liabilities:
Operating leases	$ 18	$ 18
Total lease liabilities	$ 18	$ 18
Operating lease liability, statement of financial position	Other current liabilities, Other long-term liabilities	Other current liabilities, Other long-term liabilities