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Investments (Tables) | 3 Months Ended
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Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract] |
Schedule Of Amortized Cost And Fair Value Of HTM Fixed Maturities And Related OTTI Recognized In AOCI |
March 31, 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 and agency | $ | 2,773 |  |  | $ | — |  |  | $ | 240 |  |  | $ | — |  |  | $ | 3,013 |  |  |  |
Foreign | 22,615 |  |  | (44 | ) |  | 850 |  |  | (577 | ) |  | 22,844 |  |  |  |
Corporate securities | 31,530 |  |  | (132 | ) |  | 644 |  |  | (1,374 | ) |  | 30,668 |  |  |  |
Mortgage-backed securities | 17,073 |  |  | — |  |  | 864 |  |  | (52 | ) |  | 17,885 |  |  |  |
States, municipalities, and political subdivisions | 6,968 |  |  | — |  |  | 169 |  |  | (17 | ) |  | 7,120 |  |  |  |
| $ | 80,959 |  |  | $ | (176 | ) |  | $ | 2,767 |  |  | $ | (2,020 | ) |  | $ | 81,530 |  |  |  |
| Amortized Cost |  |  | Valuation Allowance |  |  | Net Carrying Value |  |  | Gross Unrealized Appreciation |  |  | Gross Unrealized Depreciation |  |  | Fair Value |
Held to maturity |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury and agency | $ | 1,208 |  |  | $ | — |  |  | $ | 1,208 |  |  | $ | 75 |  |  | $ | — |  |  | $ | 1,283 |
Foreign | 1,294 |  |  | (7 | ) |  | 1,287 |  |  | 63 |  |  | (7 | ) |  | 1,343 |
Corporate securities | 2,272 |  |  | (36 | ) |  | 2,236 |  |  | 113 |  |  | (27 | ) |  | 2,322 |
Mortgage-backed securities | 2,266 |  |  | (1 | ) |  | 2,265 |  |  | 106 |  |  | (4 | ) |  | 2,367 |
States, municipalities, and political subdivisions | 5,030 |  |  | (1 | ) |  | 5,029 |  |  | 130 |  |  | (3 | ) |  | 5,156 |
| $ | 12,070 |  |  | $ | (45 | ) |  | $ | 12,025 |  |  | $ | 487 |  |  | $ | (41 | ) |  | $ | 12,471 |
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 and agency | $ | 3,188 |  |  | $ | 96 |  |  | $ | (1 | ) |  | $ | 3,283 |  |  | $ | — |
Foreign | 22,670 |  |  | 1,099 |  |  | (62 | ) |  | 23,707 |  |  | (25 | )
Corporate securities | 30,689 |  |  | 1,180 |  |  | (78 | ) |  | 31,791 |  |  | (5 | )
Mortgage-backed securities | 18,712 |  |  | 494 |  |  | (14 | ) |  | 19,192 |  |  | — |
States, municipalities, and political subdivisions | 7,321 |  |  | 205 |  |  | (11 | ) |  | 7,515 |  |  | — |
| $ | 82,580 |  |  | $ | 3,074 |  |  | $ | (166 | ) |  | $ | 85,488 |  |  | $ | (30 | )
Held to maturity |  |  |  |  |  |  |  |  |
U.S. Treasury and agency | $ | 1,318 |  |  | $ | 29 |  |  | $ | — |  |  | $ | 1,347 |  |  | $ | — |
Foreign | 1,423 |  |  | 62 |  |  | — |  |  | 1,485 |  |  | — |
Corporate securities | 2,349 |  |  | 121 |  |  | (2 | ) |  | 2,468 |  |  | — |
Mortgage-backed securities | 2,331 |  |  | 65 |  |  | — |  |  | 2,396 |  |  | — |
States, municipalities, and political subdivisions | 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 |
March 31, 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 and agency | $ | 2,773 |  |  | $ | — |  |  | $ | 240 |  |  | $ | — |  |  | $ | 3,013 |  |  |  |
Foreign | 22,615 |  |  | (44 | ) |  | 850 |  |  | (577 | ) |  | 22,844 |  |  |  |
Corporate securities | 31,530 |  |  | (132 | ) |  | 644 |  |  | (1,374 | ) |  | 30,668 |  |  |  |
Mortgage-backed securities | 17,073 |  |  | — |  |  | 864 |  |  | (52 | ) |  | 17,885 |  |  |  |
States, municipalities, and political subdivisions | 6,968 |  |  | — |  |  | 169 |  |  | (17 | ) |  | 7,120 |  |  |  |
| $ | 80,959 |  |  | $ | (176 | ) |  | $ | 2,767 |  |  | $ | (2,020 | ) |  | $ | 81,530 |  |  |  |
| Amortized Cost |  |  | Valuation Allowance |  |  | Net Carrying Value |  |  | Gross Unrealized Appreciation |  |  | Gross Unrealized Depreciation |  |  | Fair Value |
Held to maturity |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury and agency | $ | 1,208 |  |  | $ | — |  |  | $ | 1,208 |  |  | $ | 75 |  |  | $ | — |  |  | $ | 1,283 |
Foreign | 1,294 |  |  | (7 | ) |  | 1,287 |  |  | 63 |  |  | (7 | ) |  | 1,343 |
Corporate securities | 2,272 |  |  | (36 | ) |  | 2,236 |  |  | 113 |  |  | (27 | ) |  | 2,322 |
Mortgage-backed securities | 2,266 |  |  | (1 | ) |  | 2,265 |  |  | 106 |  |  | (4 | ) |  | 2,367 |
States, municipalities, and political subdivisions | 5,030 |  |  | (1 | ) |  | 5,029 |  |  | 130 |  |  | (3 | ) |  | 5,156 |
| $ | 12,070 |  |  | $ | (45 | ) |  | $ | 12,025 |  |  | $ | 487 |  |  | $ | (41 | ) |  | $ | 12,471 |
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 and agency | $ | 3,188 |  |  | $ | 96 |  |  | $ | (1 | ) |  | $ | 3,283 |  |  | $ | — |
Foreign | 22,670 |  |  | 1,099 |  |  | (62 | ) |  | 23,707 |  |  | (25 | )
Corporate securities | 30,689 |  |  | 1,180 |  |  | (78 | ) |  | 31,791 |  |  | (5 | )
Mortgage-backed securities | 18,712 |  |  | 494 |  |  | (14 | ) |  | 19,192 |  |  | — |
States, municipalities, and political subdivisions | 7,321 |  |  | 205 |  |  | (11 | ) |  | 7,515 |  |  | — |
| $ | 82,580 |  |  | $ | 3,074 |  |  | $ | (166 | ) |  | $ | 85,488 |  |  | $ | (30 | )
Held to maturity |  |  |  |  |  |  |  |  |
U.S. Treasury and agency | $ | 1,318 |  |  | $ | 29 |  |  | $ | — |  |  | $ | 1,347 |  |  | $ | — |
Foreign | 1,423 |  |  | 62 |  |  | — |  |  | 1,485 |  |  | — |
Corporate securities | 2,349 |  |  | 121 |  |  | (2 | ) |  | 2,468 |  |  | — |
Mortgage-backed securities | 2,331 |  |  | 65 |  |  | — |  |  | 2,396 |  |  | — |
States, municipalities, and political subdivisions | 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:
|  |  | March 31 |  |  |  |  | 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 | $ | 3,816 |  |  | $ | 3,816 |  |  | $ | 3,951 |  |  | $ | 3,973 |
Due after 1 year through 5 years | 25,837 |  |  | 25,837 |  |  | 27,142 |  |  | 27,720 |
Due after 5 years through 10 years | 23,712 |  |  | 23,712 |  |  | 23,901 |  |  | 24,874 |
Due after 10 years | 10,280 |  |  | 10,280 |  |  | 8,874 |  |  | 9,729 |
| 63,645 |  |  | 63,645 |  |  | 63,868 |  |  | 66,296 |
Mortgage-backed securities | 17,885 |  |  | 17,885 |  |  | 18,712 |  |  | 19,192 |
| $ | 81,530 |  |  | $ | 81,530 |  |  | $ | 82,580 |  |  | $ | 85,488 |
Held to maturity |  |  |  |  |  |  |
Due in 1 year or less | $ | 614 |  |  | $ | 620 |  |  | $ | 478 |  |  | $ | 479 |
Due after 1 year through 5 years | 3,695 |  |  | 3,775 |  |  | 3,869 |  |  | 3,940 |
Due after 5 years through 10 years | 3,383 |  |  | 3,479 |  |  | 3,756 |  |  | 3,883 |
Due after 10 years | 2,068 |  |  | 2,230 |  |  | 2,147 |  |  | 2,307 |
| 9,760 |  |  | 10,104 |  |  | 10,250 |  |  | 10,609 |
Mortgage-backed securities | 2,265 |  |  | 2,367 |  |  | 2,331 |  |  | 2,396 |
| $ | 12,025 |  |  | $ | 12,471 |  |  | $ | 12,581 |  |  | $ | 13,005 |
Schedule of Realized Gain (Loss) | The following table presents the components of Net realized gains (losses):
| Three Months Ended |
| March 31 |
(in millions of U.S. dollars) | 2020 |  |  | 2019 |
Fixed maturities: |  |  |
OTTI on fixed maturities, gross and net | $ | — |  |  | $ | (13 | )
Gross realized gains excluding OTTI | 77 |  |  | 27 |
Gross realized losses excluding OTTI | (125 | ) |  | (58 | )
Provision for expected credit losses | (150 | ) |  | — |
Impairment (1) | (121 | ) |  | — |
Total fixed maturities | $ | (319 | ) |  | $ | (44 | )
Equity securities | (29 | ) |  | 58 |
Other investments | 5 |  |  | (44 | )
Foreign exchange gains (losses) | (68 | ) |  | 13 |
Investment and embedded derivative instruments | 15 |  |  | (130 | )
Fair value adjustments on insurance derivative | (685 | ) |  | 114 |
S&P futures | 125 |  |  | (63 | )
Other derivative instruments | (2 | ) |  | (1 | )
Net realized gains (losses) (pre-tax) | $ | (958 | ) |  | $ | (97 | )
(1) | Related to our intent to sell certain securities.
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 |
|  |  | March 31 |
| 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 | $ | (29 | ) |  | $ | 5 |  |  | $ | (24 | ) |  | $ | 58 |  |  | $ | (44 | ) |  | $ | 14 |
Less: Net gains (losses) recognized from sales of securities | (24 | ) |  | — |  |  | (24 | ) |  | 1 |  |  | (2 | ) |  | (1 | )
Unrealized gains (losses) recognized for securities still held at reporting date | $ | (5 | ) |  | $ | 5 |  |  | $ | — |  |  | $ | 57 |  |  | $ | (42 | ) |  | $ | 15 |
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 |
March 31, 2020 | Fair Value |  |  | Gross Unrealized Loss |  |  | Fair Value |  |  | Gross Unrealized Loss |  |  | Fair Value |  |  | Gross Unrealized Loss |
(in millions of U.S. dollars) |  |  |  |  |
Foreign | $ | 6,534 |  |  | $ | (376 | ) |  | $ | 132 |  |  | $ | (21 | ) |  | $ | 6,666 |  |  | $ | (397 | )
Corporate securities | 13,492 |  |  | (858 | ) |  | 448 |  |  | (51 | ) |  | 13,940 |  |  | (909 | )
Mortgage-backed securities | 914 |  |  | (48 | ) |  | 36 |  |  | (4 | ) |  | 950 |  |  | (52 | )
States, municipalities, and political subdivisions | 637 |  |  | (6 | ) |  | 130 |  |  | (11 | ) |  | 767 |  |  | (17 | )
Total AFS fixed maturities | $ | 21,577 |  |  | $ | (1,288 | ) |  | $ | 746 |  |  | $ | (87 | ) |  | $ | 22,323 |  |  | $ | (1,375 | )
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 and agency | $ | 234 |  |  | $ | (1 | ) |  | $ | 339 |  |  | $ | — |  |  | $ | 573 |  |  | $ | (1 | )
Foreign | 1,846 |  |  | (34 | ) |  | 802 |  |  | (28 | ) |  | 2,648 |  |  | (62 | )
Corporate securities | 2,121 |  |  | (40 | ) |  | 988 |  |  | (40 | ) |  | 3,109 |  |  | (80 | )
Mortgage-backed securities | 1,174 |  |  | (6 | ) |  | 932 |  |  | (8 | ) |  | 2,106 |  |  | (14 | )
States, municipalities, and political subdivisions | 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:
| March 31, 2020 |
(in millions of U.S. dollars) | Amortized cost |  |  | % of Total |
AAA | $ | 2,642 |  |  | 22 | %
AA | 6,608 |  |  | 55 | %
A | 2,371 |  |  | 20 | %
BBB | 422 |  |  | 3 | %
BB | 21 |  |  | — | %
Other | 6 |  |  | — | %
Total | $ | 12,070 |  |  | 100 | %
Schedule Of Components Of Restricted Assets | The following table presents the components of restricted assets:
| March 31 |  |  | December 31 |
(in millions of U.S. dollars) | 2020 |  |  | 2019 |
Trust funds | $ | 13,974 |  |  | $ | 14,004 |
Deposits with U.S. regulatory authorities | 2,424 |  |  | 2,466 |
Deposits with non-U.S. regulatory authorities | 2,669 |  |  | 2,709 |
Assets pledged under repurchase agreements | 1,492 |  |  | 1,464 |
Other pledged assets | 496 |  |  | 490 |
Total | $ | 21,055 |  |  | $ | 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 |
| March 31 |
(in millions of U.S. dollars) | 2020 |
Available for sale |
Valuation allowance for expected credit losses - beginning of period | $ | — |
Impact of adoption of new accounting guidance | 25 |
Provision for expected credit loss | 149 |
Initial allowance for purchased securities with credit deterioration | 2 |
Valuation allowance for expected credit losses - end of period | $ | 176 |
Held to maturity |
Valuation allowance for expected credit losses - beginning of period | $ | — |
Impact of adoption of new accounting guidance | 44 |
Provision for expected credit loss | 1 |
Valuation allowance for expected credit losses - end of period | $ | 45 |
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 |
| March 31 |
(in millions of U.S. dollars) | 2020 |
Available for sale |
Valuation allowance for expected credit losses - beginning of period | $ | — |
Impact of adoption of new accounting guidance | 25 |
Provision for expected credit loss | 149 |
Initial allowance for purchased securities with credit deterioration | 2 |
Valuation allowance for expected credit losses - end of period | $ | 176 |
Held to maturity |
Valuation allowance for expected credit losses - beginning of period | $ | — |
Impact of adoption of new accounting guidance | 44 |
Provision for expected credit loss | 1 |
Valuation allowance for expected credit losses - end of period | $ | 45 |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table Text Block] |
|  |  |  |  | March 31 |  |  |  |  | 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 |  | $ | 590 |  |  | $ | 325 |  |  | $ | 611 |  |  | $ | 329 |
Real Assets | 2 to 11 Years |  | 721 |  |  | 414 |  |  | 712 |  |  | 422 |
Distressed | 2 to 7 Years |  | 262 |  |  | 67 |  |  | 263 |  |  | 80 |
Private Credit | 3 to 8 Years |  | 106 |  |  | 272 |  |  | 104 |  |  | 272 |
Traditional | 2 to 14 Years |  | 3,045 |  |  | 1,868 |  |  | 2,844 |  |  | 2,160 |
Vintage | 1 to 2 Years |  | 103 |  |  | — |  |  | 116 |  |  | — |
Investment funds | Not Applicable |  | 264 |  |  | — |  |  | 271 |  |  | — |
|  |  | $ | 5,091 |  |  | $ | 2,946 |  |  | $ | 4,921 |  |  | $ | 3,263 |

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- Definition Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27357-111563 + Details
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