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Debt (Tables) | 12 Months Ended
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Dec. 31, 2014
Debt Disclosure [Abstract] |
Summary of outstanding debt | The following is a summary of outstanding debt (in millions):
As of December 31 | 2014 |  | 2013
2.875% Senior Notes due May 2026 | $ | 605 |  |  | $ | — |
3.50% Senior Notes due September 2015 | 599 |  |  | 599 |
5.00% Senior Notes due September 2020 | 599 |  |  | 599 |
3.50% Senior Notes due June 2024 | 597 |  |  | — |
4.60% Senior Notes due June 2044 | 549 |  |  | — |
8.205% Junior Subordinated Notes due January 2027 | 521 |  |  | 521 |
3.125% Senior Notes due May 2016 | 500 |  |  | 500 |
4.00% Senior Notes due November 2023 | 349 |  |  | 349 |
4.76% Senior Notes due March 2018 | 322 |  |  | 352 |
6.25% Senior Notes due September 2040 | 298 |  |  | 298 |
4.45% Senior Notes due May 2043 | 248 |  |  | 248 |
4.25% Senior Notes due December 2042 | 196 |  |  | 195 |
6.25% Senior Notes due July 2014 | — |  |  | 685 |
Commercial paper | 168 |  |  | — |
Other | 31 |  |  | 43 |
Total debt | 5,582 |  |  | 4,389 |
Less short-term and current portion of long-term debt | 783 |  |  | 703 |
Total long-term debt | $ | 4,799 |  |  | $ | 3,686 |
Repayments of long-term debt | Repayments of total debt are as follows (in millions):
2015 | $ | 783 |
2016 | 511 |
2017 | 3 |
2018 | 323 |
2019 | — |
Thereafter | 3,962 |
| $ | 5,582 |

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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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