Long-term Debt - EGTS - Maturity Schedule (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
2023	$ 3,201
2024	3,018
2025	2,658
2026	1,430
2027	915
2028 and thereafter	40,480
Total	51,702
Total long-term debt	51,635	$ 49,762
EGTS
Debt Instrument [Line Items]
2023	0
2024	111
2025	0
2026	0
2027	0
2028 and thereafter	1,489
Total	1,600
Unamortized discount and debt issuance costs	(18)
Total long-term debt	$ 1,582	$ 1,581

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