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Schedule I Maturities of Short-Term Borrowings and Long-Term Debt (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Debt Instrument [Line Items]  
2022 $ 3,626
2023 2,277
2024 2,652
2025 2,452
2026 2,652
Thereafter 32,829
Parent Company [Member]  
Debt Instrument [Line Items]  
2022 3,015
2023 2,125
2024 2,500
2025 2,300
2026 2,500
Thereafter $ 32,677