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Fair Value Measurements - Fair Value Recurring Basis, Unobservable Input (Details) - Significant Unobservable Inputs (Level 3) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Liabilities |  |  |  |
Changes in Unrealized Gain/(Loss) Included in Net Income, Liabilities | $ 2 | $ 4 | $ 6 | $ 2
Contingent Consideration |  |  |  |
Liabilities |  |  |  |
Changes in Unrealized Gain/(Loss) Included in Net Income, Liabilities | (2) | 4 | 6 | 2
Fair Value, Measurements, Recurring |  |  |  |
Assets |  |  |  |
Beginning balance | 1,508 | 1,987 | 1,646 | 2,030
Total realized/unrealized gains (losses), Included in net income | (4) | (1) | (8) | 31
Total realized/unrealized gains (losses), Included in OCI | 2 | (10) | 8 | (16)
Purchases | 383 | 289 | 504 | 477
Settlements | (73) | (114) | (131) | (212)
Sales | (44) | (22) | (118) | (86)
Transfers into Level 3 | 34 | 18 | 46 | 18
Transfers out of Level 3 | (82) | (126) | (223) | (221)
Ending balance | 1,724 | 2,021 | 1,724 | 2,021
Freestanding Derivatives, net |  |  |  |
Beginning balance | 1 | 3 | 4 | 2
Total realized/unrealized gains (losses), Included in net income | (4) | (1) | (7) | 2
Total realized/unrealized gains (losses), Included in OCI | 0 | 0 | 0 | 0
Purchases | 0 | 1 | 0 | 1
Settlements | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | (2)
Transfers into Level 3 | 0 | 0 | 0 | 0
Transfers out of Level 3 | 0 | 0 | 0 | 0
Ending balance | (3) | 3 | (3) | 3
Fair Value, Measurements, Recurring | Contingent Consideration |  |  |  |
Liabilities |  |  |  |
Beginning balance | (29) | (27) | (35) | (29)
Changes in Unrealized Gain/(Loss) Included in Net Income, Liabilities | 2 | 4 | 6 | 2
Total realized/unrealized gains (losses), Included in OCI | 0 | 0 | 0 | 0
Purchases | 0 | 0 | 0 | 0
Settlements | 10 | 0 | (20) | 0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 | 0 | 0 | 0
Transfers out of Level 3 | 0 | 0 | 0 | 0
Ending balance | (21) | (31) | (21) | (31)
Fair Value, Measurements, Recurring | Equity |  |  |  |
Freestanding Derivatives, net |  |  |  |
Beginning balance | 1 | 1 | 3 | 1
Total realized/unrealized gains (losses), Included in net income | (4) | (1) | (6) | 1
Total realized/unrealized gains (losses), Included in OCI | 0 | 0 | 0 | 0
Purchases | 0 | 1 | 0 | 1
Settlements | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | (2)
Transfers into Level 3 | 0 | 0 | 0 | 0
Transfers out of Level 3 | 0 | 0 | 0 | 0
Ending balance | (3) | 1 | (3) | 1
Fair Value, Measurements, Recurring | Interest rate derivatives |  |  |  |
Freestanding Derivatives, net |  |  |  |
Beginning balance |  | 2 | 1 | 1
Total realized/unrealized gains (losses), Included in net income |  | 0 | (1) | 1
Total realized/unrealized gains (losses), Included in OCI |  | 0 | 0 | 0
Purchases |  | 0 | 0 | 0
Settlements |  | 0 | 0 | 0
Sales |  | 0 | 0 | 0
Transfers into Level 3 |  | 0 | 0 | 0
Transfers out of Level 3 |  | 0 | 0 | 0
Ending balance | 0 | 2 | 0 | 2
Fair Value, Measurements, Recurring | Securities available-for-sale and other | Total fixed maturities, FVO |  |  |  |
Assets |  |  |  |
Beginning balance | 1,434 | 1,919 | 1,565 | 1,952
Total realized/unrealized gains (losses), Included in net income | 0 | 0 | 0 | 1
Total realized/unrealized gains (losses), Included in OCI | 2 | (11) | 8 | (17)
Purchases | 379 | 287 | 495 | 475
Settlements | (73) | (114) | (131) | (212)
Sales | (39) | (21) | (105) | (44)
Transfers into Level 3 | 34 | 18 | 46 | 18
Transfers out of Level 3 | (82) | (126) | (223) | (221)
Ending balance | 1,655 | 1,952 | 1,655 | 1,952
Fair Value, Measurements, Recurring | Securities available-for-sale and other | ABS | Total fixed maturities, FVO |  |  |  |
Assets |  |  |  |
Beginning balance | 9 | 14 | 10 | 19
Total realized/unrealized gains (losses), Included in net income | 0 | 0 | 0 | 0
Total realized/unrealized gains (losses), Included in OCI | 0 | 0 | 0 | 0
Purchases | 5 | 50 | 5 | 50
Settlements | 0 | (1) | (1) | (3)
Sales | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 | 3 | 0 | 3
Transfers out of Level 3 | (9) | (9) | (9) | (12)
Ending balance | 5 | 57 | 5 | 57
Fair Value, Measurements, Recurring | Securities available-for-sale and other | CLOs | Total fixed maturities, FVO |  |  |  |
Assets |  |  |  |
Beginning balance | 114 | 106 | 100 | 95
Total realized/unrealized gains (losses), Included in net income | 0 | 0 | 0 | 0
Total realized/unrealized gains (losses), Included in OCI | 0 | 0 |  |
Purchases | 202 | 77 | 237 | 98
Settlements | (10) | 0 | (10) | 0
Sales | 0 | (4) | (6) | (4)
Transfers into Level 3 | 0 | 0 | 0 | 0
Transfers out of Level 3 | (20) | (20) | (35) | (30)
Ending balance | 286 | 159 | 286 | 159
Fair Value, Measurements, Recurring | Securities available-for-sale and other | CMBS | Total fixed maturities, FVO |  |  |  |
Assets |  |  |  |
Beginning balance | 12 | 33 | 12 | 69
Total realized/unrealized gains (losses), Included in net income | 0 | 0 | 0 | 0
Total realized/unrealized gains (losses), Included in OCI | 0 | 0 | 1 | (1)
Purchases | 24 | 25 | 24 | 25
Settlements | (1) | (2) | (2) | (3)
Sales | 0 | (8) | 0 | (8)
Transfers into Level 3 | 0 | 0 | 0 | 0
Transfers out of Level 3 | 0 | (20) | 0 | (54)
Ending balance | 35 | 28 | 35 | 28
Fair Value, Measurements, Recurring | Securities available-for-sale and other | Corporate | Total fixed maturities, FVO |  |  |  |
Assets |  |  |  |
Beginning balance | 525 | 515 | 520 | 520
Total realized/unrealized gains (losses), Included in net income | 0 | 0 | (1) | 1
Total realized/unrealized gains (losses), Included in OCI | 2 | (7) | 9 | (8)
Purchases | 58 | 66 | 95 | 131
Settlements | (4) | (18) | (6) | (32)
Sales | (39) | (8) | (64) | (31)
Transfers into Level 3 | 34 | 15 | 46 | 15
Transfers out of Level 3 | (8) | (4) | (31) | (37)
Ending balance | 568 | 559 | 568 | 559
Fair Value, Measurements, Recurring | Securities available-for-sale and other | Foreign government/government agencies | Total fixed maturities, FVO |  |  |  |
Assets |  |  |  |
Beginning balance | 3 | 2 | 3 | 2
Total realized/unrealized gains (losses), Included in net income | 0 | 0 | 0 | 0
Total realized/unrealized gains (losses), Included in OCI | 0 | 0 | 0 | 0
Purchases | 0 | 1 | 0 | 1
Settlements | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 | 0 | 0 | 0
Transfers out of Level 3 | 0 | 0 | 0 | 0
Ending balance | 3 | 3 | 3 | 3
Fair Value, Measurements, Recurring | Securities available-for-sale and other | Municipal | Total fixed maturities, FVO |  |  |  |
Assets |  |  |  |
Beginning balance |  | 16 |  | 17
Total realized/unrealized gains (losses), Included in net income |  | 0 |  | 0
Total realized/unrealized gains (losses), Included in OCI |  | 0 |  | (1)
Purchases |  | 0 |  | 0
Settlements |  | 0 |  | 0
Sales |  | 0 |  | 0
Transfers into Level 3 |  | 0 |  | 0
Transfers out of Level 3 |  | (7) |  | (7)
Ending balance |  | 9 |  | 9
Fair Value, Measurements, Recurring | Securities available-for-sale and other | RMBS | Total fixed maturities, FVO |  |  |  |
Assets |  |  |  |
Beginning balance | 771 | 1,233 | 920 | 1,230
Total realized/unrealized gains (losses), Included in net income | 0 | 0 | 1 | 0
Total realized/unrealized gains (losses), Included in OCI | 0 | (4) | (2) | (7)
Purchases | 90 | 68 | 134 | 170
Settlements | (58) | (93) | (112) | (174)
Sales | 0 | (1) | (35) | (1)
Transfers into Level 3 | 0 | 0 | 0 | 0
Transfers out of Level 3 | (45) | (66) | (148) | (81)
Ending balance | 758 | 1,137 | 758 | 1,137
Equity Securities, at fair value | Fair Value, Measurements, Recurring | Equity Securities, at fair value |  |  |  |
Assets |  |  |  |
Beginning balance | 73 |  | 77 |
Total realized/unrealized gains (losses), Included in net income | 0 |  | (1) |
Total realized/unrealized gains (losses), Included in OCI | 0 |  | 0 |
Purchases | 4 |  | 9 |
Settlements | 0 |  | 0 |
Sales | (5) |  | (13) |
Transfers into Level 3 | 0 |  | 0 |
Transfers out of Level 3 | 0 |  | 0 |
Ending balance | $ 72 |  | $ 72 |
Equity Securities, at fair value | Fair Value, Measurements, Recurring | Securities available-for-sale and other |  |  |  |
Assets |  |  |  |
Beginning balance |  | 65 |  | 76
Total realized/unrealized gains (losses), Included in net income |  | 0 |  | 28
Total realized/unrealized gains (losses), Included in OCI |  | 1 |  | 1
Purchases |  | 1 |  | 1
Settlements |  | 0 |  | 0
Sales |  | (1) |  | (40)
Transfers into Level 3 |  | 0 |  | 0
Transfers out of Level 3 |  | 0 |  | 0
Ending balance |  | $ 66 |  | $ 66

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- Definition Amount of unrealized (holding) gain (loss) which is included in the statement of income (or changes in net assets) related to those liabilities still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3). + 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 (d) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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