Debt - Schedule of Debt Repayment (Details) $ in Millions	Dec. 31, 2021 USD ($)
Debt Disclosure [Abstract]
2022	$ 1,521
2023	2,200
2024	0
2025	1,250
2026	0
Thereafter	9,100
Principal amounts repayable	14,071
Debt issuance costs	(86)
Unamortized balance discounts on bonds, net	(67)
Total debt outstanding	$ 13,918

Long-term Debt, Excluding Fair Value Adjustment and Unamortized Discount

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Long-term Debt, Fair Value Adjustment and Unamortized Discount

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Amount, before accumulated amortization, of debt issuance costs related to line of credit arrangements. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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