1 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Sovereign debt securities [Member] | Due in one year or less, amortized cost | 100000000 | USD | -6 |
2 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Treasury bills [Member] | Due in one year or less, amortized cost | 100000000 | USD | -6 |
3 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Corporate bonds [Member] | Due in one year or less, amortized cost | 100000000 | USD | -6 |
4 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | All Available-for-Sale Debt and Equity Securities [Domain] | Due in one year or less, amortized cost | 300000000 | USD | -6 |
5 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Treasury bills [Member] | Due after one year through five years, amortized cost | 100000000 | USD | -6 |
6 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | All Available-for-Sale Debt and Equity Securities [Domain] | Due after one year through five years, amortized cost | 300000000 | USD | -6 |
7 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Sovereign debt securities [Member] | Due after one year through five years, amortized cost | 100000000 | USD | -6 |
8 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Corporate bonds [Member] | Due after one year through five years, amortized cost | 100000000 | USD | -6 |
9 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Sovereign debt securities [Member] | Due after five years through ten years, amortized cost | 100000000 | USD | -6 |
10 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | All Available-for-Sale Debt and Equity Securities [Domain] | Due after five years through ten years, amortized cost | 300000000 | USD | -6 |
11 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Corporate bonds [Member] | Due after five years through ten years, amortized cost | 100000000 | USD | -6 |
12 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Treasury bills [Member] | Due after five years through ten years, amortized cost | 100000000 | USD | -6 |
13 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | All Available-for-Sale Debt and Equity Securities [Domain] | Due after ten years, amortized cost | 300000000 | USD | -6 |
14 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Treasury bills [Member] | Due after ten years, amortized cost | 100000000 | USD | -6 |
15 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Sovereign debt securities [Member] | Due after ten years, amortized cost | 100000000 | USD | -6 |
16 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Corporate bonds [Member] | Due after ten years, amortized cost | 100000000 | USD | -6 |
17 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Treasury bills [Member] | No contractual maturity dates, amortized cost | 100000000 | USD | -6 |
18 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Sovereign debt securities [Member] | No contractual maturity dates, amortized cost | 100000000 | USD | -6 |
19 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | All Available-for-Sale Debt and Equity Securities [Domain] | No contractual maturity dates, amortized cost | 300000000 | USD | -6 |
20 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Corporate bonds [Member] | No contractual maturity dates, amortized cost | 100000000 | USD | -6 |
21 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Treasury bills [Member] | Due in one year or less, estimated fair value | 100000000 | USD | -6 |
22 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | All Available-for-Sale Debt and Equity Securities [Domain] | Due in one year or less, estimated fair value | 300000000 | USD | -6 |
23 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Corporate bonds [Member] | Due in one year or less, estimated fair value | 100000000 | USD | -6 |
24 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Sovereign debt securities [Member] | Due in one year or less, estimated fair value | 100000000 | USD | -6 |
25 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | All Available-for-Sale Debt and Equity Securities [Domain] | Due after one year through five years, estimated fair value | 300000000 | USD | -6 |
26 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Treasury bills [Member] | Due after one year through five years, estimated fair value | 100000000 | USD | -6 |
27 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Sovereign debt securities [Member] | Due after one year through five years, estimated fair value | 100000000 | USD | -6 |
28 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Corporate bonds [Member] | Due after one year through five years, estimated fair value | 100000000 | USD | -6 |
29 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Sovereign debt securities [Member] | Due after five years through ten years, estimated fair value | 100000000 | USD | -6 |
30 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Treasury bills [Member] | Due after five years through ten years, estimated fair value | 100000000 | USD | -6 |
31 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Corporate bonds [Member] | Due after five years through ten years, estimated fair value | 100000000 | USD | -6 |
32 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | All Available-for-Sale Debt and Equity Securities [Domain] | Due after five years through ten years, estimated fair value | 300000000 | USD | -6 |
33 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Treasury bills [Member] | Due after ten years, estimated fair value | 100000000 | USD | -6 |
34 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Corporate bonds [Member] | Due after ten years, estimated fair value | 100000000 | USD | -6 |
35 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Sovereign debt securities [Member] | Due after ten years, estimated fair value | 100000000 | USD | -6 |
36 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | All Available-for-Sale Debt and Equity Securities [Domain] | Due after ten years, estimated fair value | 300000000 | USD | -6 |
37 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Treasury bills [Member] | No contractual maturity dates, estimated fair value | 100000000 | USD | -6 |
38 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Corporate bonds [Member] | No contractual maturity dates, estimated fair value | 100000000 | USD | -6 |
39 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | All Available-for-Sale Debt and Equity Securities [Domain] | No contractual maturity dates, estimated fair value | 300000000 | USD | -6 |
40 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Sovereign debt securities [Member] | No contractual maturity dates, estimated fair value | 100000000 | USD | -6 |
41 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Treasury bills [Member] | Available-for-sale securities at estimated fair value | 500000000 | USD | -6 |
42 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Corporate bonds [Member] | Available-for-sale securities at estimated fair value | 500000000 | USD | -6 |
43 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | All Available-for-Sale Debt and Equity Securities [Domain] | Available-for-sale securities at estimated fair value | 1500000000 | USD | -6 |
44 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Sovereign debt securities [Member] | Available-for-sale securities at estimated fair value | 500000000 | USD | -6 |
45 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | All Available-for-Sale Debt and Equity Securities [Domain] | Available-for-sale securities at amortized cost | 1500000000 | USD | -6 |
46 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Treasury bills [Member] | Available-for-sale securities at amortized cost | 500000000 | USD | -6 |
47 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Corporate bonds [Member] | Available-for-sale securities at amortized cost | 500000000 | USD | -6 |
48 | 0000000001 (http://www.sec.gov/CIK) | 2019-12-31 | Sovereign debt securities [Member] | Available-for-sale securities at amortized cost | 500000000 | USD | -6 |