Debt (Schedule of Short-term Debt) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Short-term Debt [Line Items]
Federal Home Loan Bank	$ 2,950	$ 0
Other	1,000	0
Total short-term borrowings	3,950	0
Unsecured debt
Short-term Debt [Line Items]
Federal Home Loan Bank	0	0
Other	0	0
Total short-term borrowings	0	0
Secured debt
Short-term Debt [Line Items]
Federal Home Loan Bank	2,950	0
Other	1,000	0
Total short-term borrowings	$ 3,950	$ 0

Amount of advance from Federal Home Loan Bank (FHLBank) maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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