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Investments (Tables) | 6 Months Ended
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Jun. 30, 2020
Investments, Debt and Equity Securities [Abstract] |
Schedule Of Amortized Cost And Fair Value Of HTM Fixed Maturities And Related OTTI Recognized In AOCI |
June 30, 2020 | Amortized Cost |  | Valuation Allowance |  | Gross Unrealized Appreciation |  | Gross Unrealized Depreciation |  | Fair Value |  |  |
(in millions of U.S. dollars) |  |  |  |  |  |  |  |  |  |  |  |
Available for sale |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury / Agency | $ | 2,636 |  |  | $ | — |  |  | $ | 239 |  |  | $ | — |  |  | $ | 2,875 |  |  |  |
Non-U.S. | 23,370 |  |  | (17) |  |  | 1,420 |  |  | (166) |  |  | 24,607 |  |  |  |
Corporate and asset-backed securities | 32,721 |  |  | (52) |  |  | 1,658 |  |  | (410) |  |  | 33,917 |  |  |  |
Mortgage-backed securities | 17,165 |  |  | — |  |  | 1,051 |  |  | (18) |  |  | 18,198 |  |  |  |
Municipal | 6,848 |  |  | — |  |  | 270 |  |  | (3) |  |  | 7,115 |  |  |  |
| $ | 82,740 |  |  | $ | (69) |  |  | $ | 4,638 |  |  | $ | (597) |  |  | $ | 86,712 |  |  |  |
| Amortized Cost |  | Valuation Allowance |  | Net Carrying Value |  | Gross Unrealized Appreciation |  | Gross Unrealized Depreciation |  | Fair Value |
Held to maturity |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury / Agency | $ | 1,242 |  |  | $ | — |  |  | $ | 1,242 |  |  | $ | 73 |  |  | $ | — |  |  | $ | 1,315 |  |
Non-U.S. | 1,278 |  |  | (8) |  |  | 1,270 |  |  | 102 |  |  | (2) |  |  | 1,370 |  |
Corporate and asset-backed securities | 2,232 |  |  | (41) |  |  | 2,191 |  |  | 247 |  |  | (10) |  |  | 2,428 |  |
Mortgage-backed securities | 2,189 |  |  | (1) |  |  | 2,188 |  |  | 146 |  |  | (3) |  |  | 2,331 |  |
Municipal | 4,955 |  |  | (1) |  |  | 4,954 |  |  | 223 |  |  | (1) |  |  | 5,176 |  |
| $ | 11,896 |  |  | $ | (51) |  |  | $ | 11,845 |  |  | $ | 791 |  |  | $ | (16) |  |  | $ | 12,620 |  |
December 31, 2019 | Amortized Cost |  | Gross Unrealized Appreciation |  | Gross Unrealized Depreciation |  | Fair Value |  | OTTI Recognized in AOCI
(in millions of U.S. dollars) |  |  |  |  |  |  |  |  |
Available for sale |  |  |  |  |  |  |  |  |
U.S. Treasury / Agency | $ | 3,188 |  |  | $ | 96 |  |  | $ | (1) |  |  | $ | 3,283 |  |  | $ | — |
Non-U.S. | 22,670 |  |  | 1,099 |  |  | (62) |  |  | 23,707 |  |  | (25) |
Corporate and asset-backed securities | 30,689 |  |  | 1,180 |  |  | (78) |  |  | 31,791 |  |  | (5) |
Mortgage-backed securities | 18,712 |  |  | 494 |  |  | (14) |  |  | 19,192 |  |  | — |
Municipal | 7,321 |  |  | 205 |  |  | (11) |  |  | 7,515 |  |  | — |
| $ | 82,580 |  |  | $ | 3,074 |  |  | $ | (166) |  |  | $ | 85,488 |  |  | $ | (30) |
Held to maturity |  |  |  |  |  |  |  |  |
U.S. Treasury / Agency | $ | 1,318 |  |  | $ | 29 |  |  | $ | — |  |  | $ | 1,347 |  |  | $ | — |
Non-U.S. | 1,423 |  |  | 62 |  |  | — |  |  | 1,485 |  |  | — |
Corporate and asset-backed securities | 2,349 |  |  | 121 |  |  | (2) |  |  | 2,468 |  |  | — |
Mortgage-backed securities | 2,331 |  |  | 65 |  |  | — |  |  | 2,396 |  |  | — |
Municipal | 5,160 |  |  | 150 |  |  | (1) |  |  | 5,309 |  |  | — |
| $ | 12,581 |  |  | $ | 427 |  |  | $ | (3) |  |  | $ | 13,005 |  |  | $ | — |
Schedule Of Amortized Cost and Fair Value of Available-for-sale Securities and Related OTTI Recognized in AOCI |
June 30, 2020 | Amortized Cost |  | Valuation Allowance |  | Gross Unrealized Appreciation |  | Gross Unrealized Depreciation |  | Fair Value |  |  |
(in millions of U.S. dollars) |  |  |  |  |  |  |  |  |  |  |  |
Available for sale |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury / Agency | $ | 2,636 |  |  | $ | — |  |  | $ | 239 |  |  | $ | — |  |  | $ | 2,875 |  |  |  |
Non-U.S. | 23,370 |  |  | (17) |  |  | 1,420 |  |  | (166) |  |  | 24,607 |  |  |  |
Corporate and asset-backed securities | 32,721 |  |  | (52) |  |  | 1,658 |  |  | (410) |  |  | 33,917 |  |  |  |
Mortgage-backed securities | 17,165 |  |  | — |  |  | 1,051 |  |  | (18) |  |  | 18,198 |  |  |  |
Municipal | 6,848 |  |  | — |  |  | 270 |  |  | (3) |  |  | 7,115 |  |  |  |
| $ | 82,740 |  |  | $ | (69) |  |  | $ | 4,638 |  |  | $ | (597) |  |  | $ | 86,712 |  |  |  |
| Amortized Cost |  | Valuation Allowance |  | Net Carrying Value |  | Gross Unrealized Appreciation |  | Gross Unrealized Depreciation |  | Fair Value |
Held to maturity |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury / Agency | $ | 1,242 |  |  | $ | — |  |  | $ | 1,242 |  |  | $ | 73 |  |  | $ | — |  |  | $ | 1,315 |  |
Non-U.S. | 1,278 |  |  | (8) |  |  | 1,270 |  |  | 102 |  |  | (2) |  |  | 1,370 |  |
Corporate and asset-backed securities | 2,232 |  |  | (41) |  |  | 2,191 |  |  | 247 |  |  | (10) |  |  | 2,428 |  |
Mortgage-backed securities | 2,189 |  |  | (1) |  |  | 2,188 |  |  | 146 |  |  | (3) |  |  | 2,331 |  |
Municipal | 4,955 |  |  | (1) |  |  | 4,954 |  |  | 223 |  |  | (1) |  |  | 5,176 |  |
| $ | 11,896 |  |  | $ | (51) |  |  | $ | 11,845 |  |  | $ | 791 |  |  | $ | (16) |  |  | $ | 12,620 |  |
December 31, 2019 | Amortized Cost |  | Gross Unrealized Appreciation |  | Gross Unrealized Depreciation |  | Fair Value |  | OTTI Recognized in AOCI
(in millions of U.S. dollars) |  |  |  |  |  |  |  |  |
Available for sale |  |  |  |  |  |  |  |  |
U.S. Treasury / Agency | $ | 3,188 |  |  | $ | 96 |  |  | $ | (1) |  |  | $ | 3,283 |  |  | $ | — |
Non-U.S. | 22,670 |  |  | 1,099 |  |  | (62) |  |  | 23,707 |  |  | (25) |
Corporate and asset-backed securities | 30,689 |  |  | 1,180 |  |  | (78) |  |  | 31,791 |  |  | (5) |
Mortgage-backed securities | 18,712 |  |  | 494 |  |  | (14) |  |  | 19,192 |  |  | — |
Municipal | 7,321 |  |  | 205 |  |  | (11) |  |  | 7,515 |  |  | — |
| $ | 82,580 |  |  | $ | 3,074 |  |  | $ | (166) |  |  | $ | 85,488 |  |  | $ | (30) |
Held to maturity |  |  |  |  |  |  |  |  |
U.S. Treasury / Agency | $ | 1,318 |  |  | $ | 29 |  |  | $ | — |  |  | $ | 1,347 |  |  | $ | — |
Non-U.S. | 1,423 |  |  | 62 |  |  | — |  |  | 1,485 |  |  | — |
Corporate and asset-backed securities | 2,349 |  |  | 121 |  |  | (2) |  |  | 2,468 |  |  | — |
Mortgage-backed securities | 2,331 |  |  | 65 |  |  | — |  |  | 2,396 |  |  | — |
Municipal | 5,160 |  |  | 150 |  |  | (1) |  |  | 5,309 |  |  | — |
| $ | 12,581 |  |  | $ | 427 |  |  | $ | (3) |  |  | $ | 13,005 |  |  | $ | — |
Schedule Of Fixed Maturities By Contractual Maturity | The following table presents fixed maturities by contractual maturity:
|  |  | June 30 |  |  |  | December 31
|  |  | 2020 |  |  |  | 2019
(in millions of U.S. dollars) | Net Carrying Value |  | Fair Value |  | Amortized Cost |  | Fair Value
Available for sale |  |  |  |  |  |  |
Due in 1 year or less | $ | 4,487 |  |  | $ | 4,487 |  |  | $ | 3,951 |  |  | $ | 3,973 |
Due after 1 year through 5 years | 26,867 |  |  | 26,867 |  |  | 27,142 |  |  | 27,720 |
Due after 5 years through 10 years | 25,465 |  |  | 25,465 |  |  | 23,901 |  |  | 24,874 |
Due after 10 years | 11,695 |  |  | 11,695 |  |  | 8,874 |  |  | 9,729 |
| 68,514 |  |  | 68,514 |  |  | 63,868 |  |  | 66,296 |
Mortgage-backed securities | 18,198 |  |  | 18,198 |  |  | 18,712 |  |  | 19,192 |
| $ | 86,712 |  |  | $ | 86,712 |  |  | $ | 82,580 |  |  | $ | 85,488 |
Held to maturity |  |  |  |  |  |  |
Due in 1 year or less | $ | 890 |  |  | $ | 902 |  |  | $ | 478 |  |  | $ | 479 |
Due after 1 year through 5 years | 3,505 |  |  | 3,662 |  |  | 3,869 |  |  | 3,940 |
Due after 5 years through 10 years | 3,328 |  |  | 3,516 |  |  | 3,756 |  |  | 3,883 |
Due after 10 years | 1,934 |  |  | 2,209 |  |  | 2,147 |  |  | 2,307 |
| 9,657 |  |  | 10,289 |  |  | 10,250 |  |  | 10,609 |
Mortgage-backed securities | 2,188 |  |  | 2,331 |  |  | 2,331 |  |  | 2,396 |
| $ | 11,845 |  |  | $ | 12,620 |  |  | $ | 12,581 |  |  | $ | 13,005 |
Schedule of Realized Gain (Loss) | The following table presents the components of Net realized gains (losses):
| Three Months Ended |  |  |  | Six Months Ended |  |
| June 30 |  |  |  | June 30 |  |
(in millions of U.S. dollars) | 2020 |  | 2019 |  | 2020 |  | 2019
Fixed maturities: |  |  |  |  |  |  |
OTTI on fixed maturities, gross | $ | — |  |  | $ | (14) |  |  | $ | — |  |  | $ | (27) |
OTTI on fixed maturities recognized in OCI (pre-tax) | — |  |  | 1 |  |  | — |  |  | 1 |
OTTI on fixed maturities, net | — |  |  | (13) |  |  | — |  |  | (26) |
Gross realized gains excluding OTTI | 68 |  |  | 56 |  |  | 145 |  |  | 83 |
Gross realized losses excluding OTTI | (174) |  |  | (31) |  |  | (299) |  |  | (89) |
Provision for expected credit losses | 104 |  |  | — |  |  | (46) |  |  | — |
Impairment (1) | (31) |  |  | — |  |  | (152) |  |  | — |
Total fixed maturities | $ | (33) |  |  | $ | 12 |  |  | $ | (352) |  |  | $ | (32) |
Equity securities | 148 |  |  | 5 |  |  | 119 |  |  | 63 |
Other investments | (107) |  |  | 30 |  |  | (102) |  |  | (14) |
Foreign exchange gains (losses) | (61) |  |  | (11) |  |  | (129) |  |  | 2 |
Investment and embedded derivative instruments | 14 |  |  | (181) |  |  | 29 |  |  | (311) |
Fair value adjustments on insurance derivative | 213 |  |  | (65) |  |  | (472) |  |  | 49 |
S&P futures | (103) |  |  | (20) |  |  | 22 |  |  | (83) |
Other derivative instruments | (1) |  |  | 7 |  |  | (3) |  |  | 6 |
Other | (40) |  |  | — |  |  | (40) |  |  | — |
Net realized gains (losses) (pre-tax) | $ | 30 |  |  | $ | (223) |  |  | $ | (928) |  |  | $ | (320) |
(1)Relates to certain securities we intended to sell and securities written to market entering default.
Gain (Loss) on Securities [Table Text Block] | Realized gains and losses from Equity securities and Other investments from the table above include sales of securities and unrealized gains and losses from fair value changes as follows:
|  |  |  |  |  |  | Three Months Ended |  |  |  |
|  |  |  |  |  |  | June 30 |  |  |  |
| 2020 |  |  |  |  |  | 2019 |  |  |  |
(in millions of U.S. dollars) | Equity Securities |  | Other Investments |  | Total |  | Equity Securities |  | Other Investments |  | Total
Net gains (losses) recognized during the period | $ | 148 |  |  | $ | (107) |  |  | $ | 41 |  |  | $ | 5 |  |  | $ | 30 |  |  | $ | 35 |
Less: Net gains (losses) recognized from sales of securities | 187 |  |  | — |  |  | 187 |  |  | 32 |  |  | — |  |  | 32 |
Unrealized gains (losses) recognized for securities still held at reporting date | $ | (39) |  |  | $ | (107) |  |  | $ | (146) |  |  | $ | (27) |  |  | $ | 30 |  |  | $ | 3 |
|  |  |  |  |  |  | Six Months Ended |  |  |  |
|  |  |  |  |  |  | June 30 |  |  |  |
| 2020 |  |  |  |  |  | 2019 |  |  |  |
(in millions of U.S. dollars) | Equity Securities |  | Other Investments |  | Total |  | Equity Securities |  | Other Investments |  | Total
Net gains (losses) recognized during the period | $ | 119 |  |  | $ | (102) |  |  | $ | 17 |  |  | $ | 63 |  |  | $ | (14) |  |  | $ | 49 |
Less: Net gains (losses) recognized from sales of securities | 163 |  |  | — |  |  | 163 |  |  | 33 |  |  | (2) |  |  | 31 |
Unrealized gains (losses) recognized for securities still held at reporting date | $ | (44) |  |  | $ | (102) |  |  | $ | (146) |  |  | $ | 30 |  |  | $ | (12) |  |  | $ | 18 |
Schedule Of Aggregate Fair Value And Gross Unrealized Loss By Length Of Time The Security Has Continuously Been In An Unrealized Loss Position | The following table presents, for AFS fixed maturities in an unrealized loss position (including securities on loan) that are not deemed to have credit losses, the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position:
| 0 – 12 Months |  |  |  | Over 12 Months |  |  |  | Total |  |
June 30, 2020 | Fair Value |  | Gross Unrealized Loss |  | Fair Value |  | Gross Unrealized Loss |  | Fair Value |  | Gross Unrealized Loss
(in millions of U.S. dollars) |  |  |  |  |  |  |  |  |  |  |
Non-U.S. | $ | 3,172 |  |  | $ | (117) |  |  | $ | 105 |  |  | $ | (22) |  |  | $ | 3,277 |  |  | $ | (139) |
Corporate and asset-backed securities | 7,985 |  |  | (295) |  |  | 551 |  |  | (35) |  |  | 8,536 |  |  | (330) |
Mortgage-backed securities | 953 |  |  | (13) |  |  | 27 |  |  | (2) |  |  | 980 |  |  | (15) |
Municipal | 95 |  |  | (1) |  |  | 65 |  |  | (2) |  |  | 160 |  |  | (3) |
Total AFS fixed maturities | $ | 12,205 |  |  | $ | (426) |  |  | $ | 748 |  |  | $ | (61) |  |  | $ | 12,953 |  |  | $ | (487) |
The following table presents, for all securities in an unrealized loss position (including securities on loan), the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position:
| 0 – 12 Months |  |  |  | Over 12 Months |  |  |  | Total |  |
December 31, 2019 | Fair Value |  | Gross Unrealized Loss |  | Fair Value |  | Gross Unrealized Loss |  | Fair Value |  | Gross Unrealized Loss
(in millions of U.S. dollars) |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury / Agency | $ | 234 |  |  | $ | (1) |  |  | $ | 339 |  |  | $ | — |  |  | $ | 573 |  |  | $ | (1) |
Non-U.S. | 1,846 |  |  | (34) |  |  | 802 |  |  | (28) |  |  | 2,648 |  |  | (62) |
Corporate and asset-backed securities | 2,121 |  |  | (40) |  |  | 988 |  |  | (40) |  |  | 3,109 |  |  | (80) |
Mortgage-backed securities | 1,174 |  |  | (6) |  |  | 932 |  |  | (8) |  |  | 2,106 |  |  | (14) |
Municipal | 188 |  |  | — |  |  | 276 |  |  | (12) |  |  | 464 |  |  | (12) |
Total fixed maturities | $ | 5,563 |  |  | $ | (81) |  |  | $ | 3,337 |  |  | $ | (88) |  |  | $ | 8,900 |  |  | $ | (169) |
Debt Securities, Held-to-maturity, Credit Quality Indicator [Table Text Block] | The following table presents the amortized cost of our HTM securities according to S&P rating:
June 30, 2020 |  |  |
(in millions of U.S. dollars) | Amortized cost |  | % of Total
AAA | $ | 2,583 |  |  | 22 | %
AA | 6,397 |  |  | 54 | %
A | 2,302 |  |  | 19 | %
BBB | 591 |  |  | 5 | %
BB | 21 |  |  | — | %
Other | 2 |  |  | — | %
Total | $ | 11,896 |  |  | 100 | %
Schedule Of Components Of Restricted Assets | The following table presents the components of restricted assets:
| June 30 |  | December 31
(in millions of U.S. dollars) | 2020 |  | 2019
Trust funds | $ | 12,522 |  |  | $ | 14,004 |
Deposits with U.S. regulatory authorities | 2,424 |  |  | 2,466 |
Deposits with non-U.S. regulatory authorities | 2,807 |  |  | 2,709 |
Assets pledged under repurchase agreements | 1,460 |  |  | 1,464 |
Other pledged assets | 523 |  |  | 490 |
Total | $ | 19,736 |  |  | $ | 21,133 |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Table Text Block] | The following table presents a roll-forward of valuation allowance for expected credit losses on fixed maturities:
| Three Months Ended |  | Six Months Ended
| June 30 |  | June 30
(in millions of U.S. dollars) | 2020 |  | 2020
Available for sale |  |  |
Valuation allowance for expected credit losses - beginning of period | $ | 176 |  |  | $ | — |
Impact of adoption of new accounting guidance | — |  |  | 25 |
Provision for expected credit loss | 29 |  |  | 178 |
Initial allowance for purchased securities with credit deterioration | 3 |  |  | 5 |
Write-offs charged against the expected credit loss | (5) |  |  | (5) |
Recovery of expected credit loss | (134) |  |  | (134) |
Valuation allowance for expected credit losses - end of period | $ | 69 |  |  | $ | 69 |
Held to maturity |  |  |
Valuation allowance for expected credit losses - beginning of period | $ | 45 |  |  | $ | — |
Impact of adoption of new accounting guidance | — |  |  | 44 |
Provision for expected credit loss | 6 |  |  | 7 |
Valuation allowance for expected credit losses - end of period | $ | 51 |  |  | $ | 51 |
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Table Text Block] | The following table presents a roll-forward of valuation allowance for expected credit losses on fixed maturities:
| Three Months Ended |  | Six Months Ended
| June 30 |  | June 30
(in millions of U.S. dollars) | 2020 |  | 2020
Available for sale |  |  |
Valuation allowance for expected credit losses - beginning of period | $ | 176 |  |  | $ | — |
Impact of adoption of new accounting guidance | — |  |  | 25 |
Provision for expected credit loss | 29 |  |  | 178 |
Initial allowance for purchased securities with credit deterioration | 3 |  |  | 5 |
Write-offs charged against the expected credit loss | (5) |  |  | (5) |
Recovery of expected credit loss | (134) |  |  | (134) |
Valuation allowance for expected credit losses - end of period | $ | 69 |  |  | $ | 69 |
Held to maturity |  |  |
Valuation allowance for expected credit losses - beginning of period | $ | 45 |  |  | $ | — |
Impact of adoption of new accounting guidance | — |  |  | 44 |
Provision for expected credit loss | 6 |  |  | 7 |
Valuation allowance for expected credit losses - end of period | $ | 51 |  |  | $ | 51 |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table Text Block] |
|  |  |  |  | June 30 |  |  |  | December 31
| Expected Liquidation Period of Underlying Assets |  |  |  | 2020 |  |  |  | 2019
(in millions of U.S. dollars) |  |  | Fair Value |  | Maximum Future Funding Commitments |  | Fair Value |  | Maximum Future Funding Commitments
Financial | 2 to 10 Years |  | $ | 521 |  |  | $ | 309 |  |  | $ | 611 |  |  | $ | 329 |
Real Assets | 2 to 11 Years |  | 674 |  |  | 749 |  |  | 712 |  |  | 422 |
Distressed | 2 to 8 Years |  | 220 |  |  | 158 |  |  | 263 |  |  | 80 |
Private Credit | 3 to 8 Years |  | 81 |  |  | 272 |  |  | 104 |  |  | 272 |
Traditional | 2 to 14 Years |  | 3,039 |  |  | 1,852 |  |  | 2,844 |  |  | 2,160 |
Vintage | 1 to 2 Years |  | 90 |  |  | — |  |  | 116 |  |  | — |
Investment funds | Not Applicable |  | 228 |  |  | — |  |  | 271 |  |  | — |
|  |  | $ | 4,853 |  |  | $ | 3,340 |  |  | $ | 4,921 |  |  | $ | 3,263 |

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References No definition available. + Details
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- Definition Tabular disclosure of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=118955579&loc=SL82922900-210455 + Details
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- Definition Tabular disclosure of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 + Details
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