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Commitments, contingencies, and guarantees (Tables) | 12 Months Ended
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Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract] |
Balance Sheet Locations, Fair Values In An Asset Or (Liability) Position, And Notional Values/Payment Provisions Of Derivative Instruments | The following table presents the balance sheet locations, fair values of derivative instruments in an asset or (liability) position, and notional values/payment provisions of our derivative instruments:
|  |  | December 31, 2017 |  |  |  | December 31, 2016 |
| Consolidated Balance Sheet Location |  | Fair Value |  |  | Notional Value/ Payment Provision |  |  |  | Fair Value |  |  | Notional Value/ Payment Provision |
|  | Derivative Asset |  |  | Derivative (Liability) |  |  |  |  | Derivative Asset |  |  | Derivative (Liability) |  |
(in millions of U.S. dollars) |  |  |  |  |  |  |
Investment and embedded derivative instruments: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency forward contracts | OA / (AP) |  | $ | 14 |  |  | $ | (27 | ) |  | $ | 2,064 |  |  |  | $ | 25 |  |  | $ | (50 | ) |  | $ | 2,220 |
Cross-currency swaps | OA / (AP) |  | — |  |  | — |  |  | 45 |  |  |  | — |  |  | — |  |  | 95 |
Options/Futures contracts on notes and bonds | OA / (AP) |  | 4 |  |  | (3 | ) |  | 1,007 |  |  |  | 6 |  |  | (4 | ) |  | 2,344 |
Convertible securities (1) | FM AFS/ES |  | 5 |  |  | — |  |  | 6 |  |  |  | 2 |  |  | — |  |  | 7 |
|  |  | $ | 23 |  |  | $ | (30 | ) |  | $ | 3,122 |  |  |  | $ | 33 |  |  | $ | (54 | ) |  | $ | 4,666 |
Other derivative instruments: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Futures contracts on equities (2) | OA / (AP) |  | $ | — |  |  | $ | (21 | ) |  | $ | 1,553 |  |  |  | $ | 1 |  |  | $ | — |  |  | $ | 1,316 |
Other | OA / (AP) |  | 1 |  |  | (2 | ) |  | 75 |  |  |  | 2 |  |  | (13 | ) |  | 214 |
|  |  | $ | 1 |  |  | $ | (23 | ) |  | $ | 1,628 |  |  |  | $ | 3 |  |  | $ | (13 | ) |  | $ | 1,530 |
GLB (3) | (AP) / (FPB) |  | $ | — |  |  | $ | (550 | ) |  | $ | 1,083 |  |  |  | $ | — |  |  | $ | (853 | ) |  | $ | 1,264 |
(1) | Includes fair value of embedded derivatives.
(2) | Related to GMDB and GLB blocks of business.
(3) | Includes both future policy benefits reserves and fair value derivative adjustment. Refer to Note 5 c) for additional information. Note that the payment provision related to GLB is the net amount at risk. The concept of a notional value does not apply to the GLB reinsurance contracts.
Secured Borrowings Securities Lending Table | The following table presents the carrying value of collateral held under securities lending agreements by investment category and remaining contractual maturity of the underlying agreements:
| Remaining contractual maturity |
| December 31 2017 |  |  | December 31 2016 |
(in millions of U.S. dollars) | Overnight and Continuous |
Collateral held under securities lending agreements: |  |  |
Cash | $ | 828 |  |  | $ | 423 |
U.S. Treasury and agency | 36 |  |  | 54 |
Foreign | 712 |  |  | 578 |
Corporate securities | — |  |  | 37 |
Mortgage-backed securities | 74 |  |  | — |
Equity securities | 87 |  |  | — |
| $ | 1,737 |  |  | $ | 1,092 |
Gross amount of recognized liability for securities lending payable | $ | 1,737 |  |  | $ | 1,093 |
Difference (1) | $ | — |  |  | $ | (1 | )
(1) | The carrying value of the securities lending collateral held is $1 million lower than the securities lending payable at December 31, 2016 due to accrued interest recorded in the securities lending payable.
At December 31, 2017 and 2016, our repurchase agreement obligations of $1,408 million and $1,403 million, respectively, were fully collateralized. In contrast to securities lending programs, the use of cash received is not restricted for the repurchase obligations. The fair value of the underlying securities sold remains in Fixed maturities available for sale, and the repurchase agreement obligation is recorded in Repurchase agreements in the Consolidated balance sheets. The following table presents the carrying value of collateral pledged under repurchase agreements by investment category and remaining contractual maturity of the underlying agreements:
| Remaining contractual maturity |
| December 31, 2017 |  |  | December 31, 2016 |
| Up to 30 Days |  |  | Greater than 90 Days |  |  |  |  | Up to 30 Days |  |  | Greater than 90 Days |  |  | Total |
(in millions of U.S. dollars) |  | Total |  |  |  |
Collateral pledged under repurchase agreements: |  |  |  |  |  |  |  |  |  |  |
Cash | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 1 |  |  | $ | 1 |
U.S. Treasury and agency | 9 |  |  | 230 |  |  | 239 |  |  | 230 |  |  | 10 |  |  | 240 |
Mortgage-backed securities | 369 |  |  | 826 |  |  | 1,195 |  |  | 339 |  |  | 881 |  |  | 1,220 |
| $ | 378 |  |  | $ | 1,056 |  |  | $ | 1,434 |  |  | $ | 569 |  |  | $ | 892 |  |  | $ | 1,461 |
Gross amount of recognized liabilities for repurchase agreements |  |  |  |  | $ | 1,408 |  |  |  |  |  |  | $ | 1,403 |
Difference (1) |  |  |  |  | $ | 26 |  |  |  |  |  |  | $ | 58 |
(1) | Per the repurchase agreements, the amount of collateral posted is required to exceed the amount of gross liability.
Derivative Instruments, Gain (Loss) [Table Text Block] | The following table presents net realized gains (losses) related to derivative instrument activity in the Consolidated statements of operations:
| Year Ended December 31 |
(in millions of U.S. dollars) | 2017 |  |  | 2016 |  |  | 2015 |
Investment and embedded derivative instruments: |  |  |  |  |
Foreign currency forward contracts | $ | 9 |  |  | $ | (31 | ) |  | $ | 31 |
All other futures contracts and options | (21 | ) |  | (10 | ) |  | 9 |
Convertible securities (1) | 1 |  |  | 8 |  |  | (8 | )
Total investment and embedded derivative instruments | $ | (11 | ) |  | $ | (33 | ) |  | $ | 32 |
GLB and other derivative instruments: |  |  |  |  |
GLB (2) | $ | 364 |  |  | $ | 53 |  |  | $ | (203 | )
Futures contracts on equities (3) | (261 | ) |  | (136 | ) |  | (8 | )
Other | (5 | ) |  | (10 | ) |  | (14 | )
Total GLB and other derivative instruments | $ | 98 |  |  | $ | (93 | ) |  | $ | (225 | )
| $ | 87 |  |  | $ | (126 | ) |  | $ | (193 | )
(1) | Includes embedded derivatives.
(2) |
Schedule of Future Minimum Rental Payments for Operating Leases | Future minimum lease payments under the leases are expected to be as follows:
For the years ending December 31
(in millions of U.S. dollars)
2018 | $ | 181 |
2019 | 153 |
2020 | 133 |
2021 | 114 |
2022 | 89 |
Thereafter | 230 |
Total minimum future lease commitments | $ | 900 |

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