Short-Term and Long-Term Debt (Future Principal Payments) (Details) $ in Millions	Dec. 31, 2021 USD ($)
Future principal payments due on long-term debt [Abstract]
2022	$ 300
2023	500
2024	250
2025	300
2026	400
Thereafter	4,581
Total	$ 6,331

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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