Long-Term Debt and Credit Facilities - Schedule of Maturities of Long Term Debt (Details) $ in Millions	Sep. 30, 2021 USD ($)
Long-term Debt, Fiscal Year Maturity
2021 (remaining three months)	$ 989
2022	1,551
2023	977
2024	1,158
2025	2,927
2026 and thereafter	22,364
Total long-term debt	29,966
Disposal Group, Held-for-sale, Not Discontinued Operations
Long-term Debt, Fiscal Year Maturity
Total long-term debt	$ 1,500