Leases - EGTS - Schedule of Operating and Finance Lease, Supplemental Cash Flow (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Operating cash flows from operating leases	$ 141	$ 163	$ 152
Operating cash flows from finance leases	36	38	40
Right-of-use assets obtained in exchange for lease liabilities:
Finance leases	3	2	19
EGTS
Lessee, Lease, Description [Line Items]
Operating cash flows from operating leases	2	3	9
Operating cash flows from finance leases	0	1	0
Right-of-use assets obtained in exchange for lease liabilities:
Finance leases	$ 0	$ 0	$ 1