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Borrowings and Credit Agreements - Short-term Borrowings (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021
Short-term Debt [Line Items] |  |
Federal home loan bank advances maximum amount available | $ 915,000,000 |
Commercial Paper |  |
Short-term Debt [Line Items] |  |
Short-term debt | 0 | $ 0
Line of Credit | Back-Up Credit Facilities |  |
Short-term Debt [Line Items] |  |
Short-term debt | $ 0 | 0
Commitment fee percentage | 0.03% |
Line of Credit | Revolving Credit Facility, Expiring May 16, 2025 |  |
Short-term Debt [Line Items] |  |
Maximum borrowing capacity | $ 2,000,000,000 |
Debt instrument term | 5 years |
Line of Credit | Revolving Credit Facility, Expiring May 11, 2026 |  |
Short-term Debt [Line Items] |  |
Maximum borrowing capacity | $ 2,000,000,000 |
Debt instrument term | 5 years |
Line of Credit | Revolving Credit Facility, Expiring May 16, 2027 |  |
Short-term Debt [Line Items] |  |
Maximum borrowing capacity | $ 2,000,000,000 |
Debt instrument term | 5 years |
Federal Home Loan Bank Advances |  |
Short-term Debt [Line Items] |  |
Short-term debt | $ 0 | $ 0

X
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- Definition Amount of maximum advances or credit lines available from the Federal Home Loan Bank (FHLB). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(3)(a)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22 (b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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