Leases - EGTS - Schedule of Operating and Finance Lease (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Right-of-use assets:
Operating leases	$ 501	$ 545
Operating lease right-of-use asset, statement of financial position	Other assets	Other assets
Total right-of-use assets	$ 900	$ 963
Lease liabilities:
Operating leases	$ 555	$ 605
Operating lease liability, statement of financial position	Other current liabilities, Other long-term liabilities	Other current liabilities, Other long-term liabilities
Total lease liabilities	$ 968	$ 1,037
EGTS
Right-of-use assets:
Operating leases	$ 18	$ 19
Operating lease right-of-use asset, statement of financial position	Other assets	Other assets
Total right-of-use assets	$ 18	$ 19
Lease liabilities:
Operating leases	$ 17	$ 18
Operating lease liability, statement of financial position	Other current liabilities, Other long-term liabilities	Other current liabilities, Other long-term liabilities
Total lease liabilities	$ 17	$ 18