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Investments (Payables For Collateral On Investments) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Carrying Value Of Payables For Collateral On Investments [Abstract] |  |
Collateral payable for derivative investments | $ 5,575 | $ 2,976
Securities pledged under securities lending agreements | 241 | 116
Investments pledged for Federal Home Loan Bank of Indianapolis ('FHLBI') | 3,130 | 3,130
Total payables for collateral on investments | 8,946 | 6,222
Fair Value Of Related Investments Or Collateral [Abstract] |  |
Collateral payable for derivative investments | 5,575 | 2,976
Securities pledged under securities lending agreements | 235 | 112
Investments pledged for Federal Home Loan Bank of Indianapolis('FHLBI') | 4,876 | 5,049
Total payables for collateral on investments | $ 10,686 | $ 8,137
Percentage of the fair value of domestic securities obtained as collateral under securities lending agreements. | 102.00% |
Percentage of the fair value of foreign securities obtained as collateral under securities lending agreements. | 105.00% |
Maximum [Member] |  |
Fair Value Of Related Investments Or Collateral [Abstract] |  |
Percentage of the fair value of FHLBI securities obtained as collateral under securities pledged for FHLBI for AFS Securities | 115.00% |
Percentage of the fair value of FHLBI securities obtained as collateral under securities pledged for FHLBI for mortgage loan | 175.00% |
Minimum [Member] |  |
Fair Value Of Related Investments Or Collateral [Abstract] |  |
Percentage of the fair value of FHLBI securities obtained as collateral under securities pledged for FHLBI for AFS Securities | 105.00% |
Percentage of the fair value of FHLBI securities obtained as collateral under securities pledged for FHLBI for mortgage loan | 155.00% |

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- Definition This item represents the percentage of the fair value of AFS securities obtained as collateral pledged. + References No definition available. + Details
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- Definition This item represents the percentage of the fair value of Mortgage loans obtained as collateral pledged. + References No definition available. + Details
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- Definition This item represents the percentage of the fair value of foreign securities obtained as collateral under securities lending agreements + References No definition available. + Details
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- Definition When entering into a derivative transaction, the amount of cash received as collateral from a counterparty. + References No definition available. + Details
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- Definition The fair value of cash received as collateral from a counterparty. + References No definition available. + Details
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- Definition The amount of cash received as security in return for loaning securities to Federal Home Loan Bank of Indianapolis. + References No definition available. + Details
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- Definition The fair value of investments loaned to Federal Home Loan Bank of Indianapolis as of the balance sheet date. + References No definition available. + Details
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- Definition The fair value of investments loaned to another party under securities lending agreements as of the balance sheet date. + References No definition available. + Details
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- Definition The total fair value of investments related to payables for collateral on investments as of the balance sheet date. + References No definition available. + Details
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- Definition The amount of cash received as security in return for loaning securities to another party. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(11)) -URI http://asc.fasb.org/extlink&oid=120401414&loc=d3e603758-122996 + Details
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- Definition Amount, before effects of master netting arrangements, of financial assets loaned to entities in exchange for collateral. Includes liabilities not subject to a master netting arrangement and financial assets transferred other than securities that qualify as secured borrowings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 7 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL34722452-111729 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 7 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL34722452-111729 + Details
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