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Debt (Tables) | 12 Months Ended
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Dec. 31, 2017
Debt Disclosure [Abstract] |
Schedule of debt instruments | Debt is composed of the following obligations.
December 31 |  |  |
(In millions) | 2017 |  | 2016
Short term debt: |  |  |
Senior notes of CNAF, 6.950%, face amount of $150, due January 15, 2018 | $ | 150 |  |  | $ | — |
Long term debt: |  |  |
Senior notes of CNAF: |  |  |
6.950%, face amount of $150, due January 15, 2018 | — |  |  | 150 |
7.350%, face amount of $350, due November 15, 2019 | — |  |  | 349 |
5.875%, face amount of $500, due August 15, 2020 | 498 |  |  | 498 |
5.750%, face amount of $400, due August 15, 2021 | 398 |  |  | 398 |
3.950%, face amount of $550, due May 15, 2024 | 547 |  |  | 546 |
4.500%, face amount of $500, due March 1, 2026 | 498 |  |  | 498 |
3.450%, face amount of $500, due August 15, 2027 | 495 |  |  | — |
Debenture of CNAF, 7.250%, face amount of $243, due November 15, 2023 | 242 |  |  | 241 |
Subordinated variable rate debt of Hardy, face amount of $30, due September 15, 2036 | 30 |  |  | 30 |
Total long term debt | 2,708 |  |  | 2,710 |
Total debt | $ | 2,858 |  |  | $ | 2,710 |
Maturity of debt | The combined aggregate maturities for debt as of December 31, 2017 are presented in the following table.
(In millions) |
2018 | $ | 150 |
2019 | — |
2020 | 500 |
2021 | 400 |
2022 | — |
Thereafter | 1,823 |
Less discount | (15 | )
Total | $ | 2,858 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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