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Fair Value (Unobservable Input Reconciliation) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Residential mortgage loans - FVO |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance, beginning of period | $ 119 | $ 149 | $ 127 | $ 165
Total realized/unrealized gains (losses) included in net income (loss) | (5) | (1) | (9) | (3)
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0 | 0
Purchases | 0 | 0 | 0 | 0
Sales | 0 | (2) | 0 | (11)
Issuances | 0 | 0 | 0 | 0
Settlements | (5) | (6) | (9) | (11)
Transfers into Level 3 | 0 | 0 | 0 | 0
Transfers out of Level 3 | 0 | 0 | 0 | 0
Balance, end of period | 109 | 140 | 109 | 140
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (5) | (2) | (9) | (7)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0 | 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (5) | (2) | (9) | (7)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0 | 0
Net Derivatives |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (291) | (69) | (15) | (132)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | (199) | 200 | (390) | (274)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Balance, beginning of period | 31 | (162) | (152) | 594
Total realized/unrealized gains (losses) included in net income (loss) | (292) | (49) | 17 | (217)
Total realized/unrealized gains (losses) included in AOCI | (191) | 205 | (410) | (412)
Purchases | 152 | 4 | 240 | 4
Sales | 0 | 0 | 0 | 0
Issuances | 0 | (5) | (2) | (6)
Settlements | 13 | 0 | 20 | 94
Transfers into Level 3 | 0 | 0 | 0 | 1
Transfers out of Level 3 | 0 | 64 | 0 | (1)
Balance, end of period | (287) | 57 | (287) | 57
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (291) | (69) | (15) | (132)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | (199) | 200 | (390) | (274)
Net Embedded Derivatives |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 97 | (3) | 139 | 668
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 13 | 1 | 22 | 22
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Balance, beginning of period | (578) | (508) | (611) | (1,141)
Total realized/unrealized gains (losses) included in net income (loss) | 97 | (4) | 139 | 669
Total realized/unrealized gains (losses) included in AOCI | 14 | 1 | 23 | 22
Purchases | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Issuances | 0 | 0 | 0 | 0
Settlements | (29) | (63) | (47) | (124)
Transfers into Level 3 | 0 | 0 | 0 | 0
Transfers out of Level 3 | 0 | 0 | 0 | 0
Balance, end of period | (496) | (574) | (496) | (574)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 97 | (3) | 139 | 668
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 13 | 1 | 22 | 22
Corporate fixed maturity securities |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance, beginning of period | 24,362 | 23,419 | 25,435 | 24,101
Total realized/unrealized gains (losses) included in net income (loss) | (5) | (8) | (16) | (5)
Total realized/unrealized gains (losses) included in AOCI | (2,857) | 415 | (4,892) | (776)
Purchases | 1,643 | 868 | 2,698 | 1,722
Sales | (315) | (286) | (782) | (507)
Issuances | 0 | 0 | 0 | 0
Settlements | 0 | 0 | 0 | 0
Transfers into Level 3 | 154 | 48 | 463 | 101
Transfers out of Level 3 | (400) | (683) | (324) | (863)
Balance, end of period | 22,582 | 23,773 | 22,582 | 23,773
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (5) | (8) | (16) | (8)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | (2,851) | 416 | (4,885) | (767)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (5) | (8) | (16) | (8)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | (2,851) | 416 | (4,885) | (767)
Foreign government |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance, beginning of period | 248 | 132 | 91 | 117
Total realized/unrealized gains (losses) included in net income (loss) | 4 | 0 | (43) | 1
Total realized/unrealized gains (losses) included in AOCI | 3 | 0 | 7 | (1)
Purchases | 1 | 46 | 1 | 46
Sales | (2) | (3) | (2) | (5)
Issuances | 0 | 0 | 0 | 0
Settlements | 0 | 0 | 0 | 0
Transfers into Level 3 | 3 | 10 | 49 | 13
Transfers out of Level 3 | (154) | (40) | 0 | (26)
Balance, end of period | 103 | 145 | 103 | 145
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 4 | 0 | (43) | 1
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 3 | 0 | 6 | (1)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 4 | 0 | (43) | 1
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 3 | 0 | 6 | (1)
Structured Securities |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance, beginning of period | 5,930 | 5,507 | 5,871 | 5,289
Total realized/unrealized gains (losses) included in net income (loss) | 12 | 16 | 23 | 24
Total realized/unrealized gains (losses) included in AOCI | (207) | 19 | (423) | (28)
Purchases | 536 | 823 | 732 | 1,380
Sales | (468) | (332) | (668) | (685)
Issuances | 0 | 0 | 0 | 0
Settlements | 0 | 0 | 0 | 0
Transfers into Level 3 | 129 | 345 | 190 | 270
Transfers out of Level 3 | (585) | (375) | (378) | (247)
Balance, end of period | 5,347 | 6,003 | 5,347 | 6,003
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 12 | 15 | 23 | 22
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | (205) | 19 | (416) | (26)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 12 | 15 | 23 | 22
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | (205) | 19 | (416) | (26)
Municipals |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance, beginning of period | 29 | 5 | 0 | 0
Total realized/unrealized gains (losses) included in net income (loss) | 0 | 0 | 0 | 0
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0 | 0
Purchases | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Issuances | 0 | 0 | 0 | 0
Settlements | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 | 0 | 0 | 0
Transfers out of Level 3 | (29) | (5) | 0 | 0
Balance, end of period | 0 | 0 | 0 | 0
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | 0 | 0 | 0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0 | 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | 0 | 0 | 0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0 | 0
Equity Securities |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance, beginning of period | 189 | 154 | 151 | 150
Total realized/unrealized gains (losses) included in net income (loss) | (2) | 6 | 11 | 10
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0 | 0
Purchases | 2 | 3 | 25 | 3
Sales | (10) | (15) | (6) | (16)
Issuances | 0 | 0 | 0 | 0
Settlements | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 | 0 | 0 | 0
Transfers out of Level 3 | 0 | (5) | (2) | (4)
Balance, end of period | 179 | 143 | 179 | 143
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (3) | 3 | 9 | 5
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0 | 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (3) | 3 | 9 | 5
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0 | 0
Unit-linked and FVO Securities |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance, beginning of period | 868 | 812 | 901 | 701
Total realized/unrealized gains (losses) included in net income (loss) | (132) | 45 | (169) | 62
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0 | 0
Purchases | 8 | 12 | 15 | 21
Sales | (2) | (16) | (4) | (15)
Issuances | 0 | 0 | 0 | 0
Settlements | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 | 10 | 13 | 95
Transfers out of Level 3 | 0 | (14) | (14) | (15)
Balance, end of period | 742 | 849 | 742 | 849
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (132) | 44 | (168) | 61
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0 | 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (132) | 44 | (168) | 61
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0 | 0
Short-term Investments |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance, beginning of period | 5 | 102 | 3 | 43
Total realized/unrealized gains (losses) included in net income (loss) | 0 | 0 | (1) | 0
Total realized/unrealized gains (losses) included in AOCI | 0 | 1 | 0 | (1)
Purchases | 15 | 35 | 119 | 84
Sales | (1) | (46) | (2) | (10)
Issuances | 0 | 0 | 0 | 0
Settlements | 0 | 0 | 0 | 0
Transfers into Level 3 | 100 | 50 | 0 | 0
Transfers out of Level 3 | 0 | (29) | 0 | (3)
Balance, end of period | 119 | 113 | 119 | 113
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | 0 | 0 | 0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | (1) | 0 | (1)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | 0 | 0 | 0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | (1) | 0 | (1)
Short-term Investments | MetLife Poland and Greece |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Transfers out of Level 3 |  | (28) |  |
Other Investments |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance, beginning of period | 1,047 | 656 | 898 | 573
Total realized/unrealized gains (losses) included in net income (loss) | 26 | 12 | 72 | 25
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0 | 0
Purchases | 61 | 113 | 187 | 183
Sales | (21) | 0 | (44) | 0
Issuances | 0 | 0 | 0 | 0
Settlements | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 | 0 | 0 | 0
Transfers out of Level 3 | (100) | 0 | (100) | 0
Balance, end of period | 1,013 | 781 | 1,013 | 781
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 23 | 12 | 69 | 26
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0 | 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 23 | 12 | 69 | 26
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0 | 0
Separate Accounts |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance, beginning of period | 2,118 | 1,133 | 2,131 | 1,079
Total realized/unrealized gains (losses) included in net income (loss) | 24 | 12 | 43 | 2
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0 | 0
Purchases | 36 | 118 | 107 | 188
Sales | (949) | (27) | (1,047) | (32)
Issuances | (5) | 1 | (5) | 0
Settlements | 6 | 3 | 4 | 5
Transfers into Level 3 | 0 | 9 | 1 | 10
Transfers out of Level 3 | 0 | 0 | (4) | (3)
Balance, end of period | 1,230 | 1,249 | 1,230 | 1,249
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | 0 | 0 | 0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0 | 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | 0 | 0 | 0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | $ 0 | $ 0 | $ 0 | $ 0

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- Definition Amount of unrealized gain (loss) recognized in other comprehensive income (OCI) from asset (liability) measured at fair value on recurring basis using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of issuances of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(3) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(3) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of gain (loss) recognized in income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19279-110258 + Details
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