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Summarized Consolidating Financial Data - Consolidating Cash Flow Statements (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 25, 2015 | Sep. 26, 2014 | Sep. 25, 2015 | Sep. 26, 2014
Operating Activities |  |  |  |
Net Cash Provided by (Used in) Operating Activities |  |  | $ 2,512 | $ 2,302
Investing Activities |  |  |  |
Property Additions |  |  | (1,909) | (1,557)
Purchase of Short-term Investments |  |  | (1,170) | (1,170)
Proceeds from Sales of Short-term Investments |  |  | 1,040 | 1,102
Proceeds from Property Dispositions |  |  | 46 | 57
Other Investing Activities |  |  | 42 | (52)
Net Cash Used in Investing Activities |  |  | (1,951) | (1,620)
Financing Activities |  |  |  |
Long-term Debt Issued |  |  | 600 | 1,000
Long-term Debt Repaid |  |  | (228) | (932)
Dividends Paid |  |  | (512) | (470)
Shares Repurchased | $ (262) | $ (131) | (546) | (388)
Other Financing Activities |  |  | (3) | (5)
Net Cash Used in Financing Activities |  |  | (689) | (795)
Net Decrease in Cash and Cash Equivalents |  |  | (128) | (113)
Cash and Cash Equivalents at Beginning of Period |  |  | 669 | 592
Cash and Cash Equivalents at End of Period | 541 | 479 | 541 | 479
CSX Corporation |  |  |  |
Operating Activities |  |  |  |
Net Cash Provided by (Used in) Operating Activities |  |  | 637 | 397
Investing Activities |  |  |  |
Property Additions |  |  | 0 | 0
Purchase of Short-term Investments |  |  | (1,170) | (1,170)
Proceeds from Sales of Short-term Investments |  |  | 995 | 1,077
Proceeds from Property Dispositions |  |  | 0 | 0
Other Investing Activities |  |  | (11) | 0
Net Cash Used in Investing Activities |  |  | (186) | (93)
Financing Activities |  |  |  |
Long-term Debt Issued |  |  | 600 | 1,000
Long-term Debt Repaid |  |  | (200) | (600)
Dividends Paid |  |  | (512) | (470)
Shares Repurchased |  |  | (546) | (388)
Other Financing Activities |  |  | 8 | 10
Net Cash Used in Financing Activities |  |  | (650) | (448)
Net Decrease in Cash and Cash Equivalents |  |  | (199) | (144)
Cash and Cash Equivalents at Beginning of Period |  |  | 510 | 439
Cash and Cash Equivalents at End of Period | 311 | 295 | 311 | 295
CSX Transportation |  |  |  |
Operating Activities |  |  |  |
Net Cash Provided by (Used in) Operating Activities |  |  | 2,313 | 2,301
Investing Activities |  |  |  |
Property Additions |  |  | (1,794) | (1,398)
Purchase of Short-term Investments |  |  | 0 | 0
Proceeds from Sales of Short-term Investments |  |  | 0 | 0
Proceeds from Property Dispositions |  |  | 46 | 57
Other Investing Activities |  |  | 93 | (147)
Net Cash Used in Investing Activities |  |  | (1,655) | (1,488)
Financing Activities |  |  |  |
Long-term Debt Issued |  |  | 0 | 0
Long-term Debt Repaid |  |  | (28) | (332)
Dividends Paid |  |  | (563) | (428)
Shares Repurchased |  |  | 0 | 0
Other Financing Activities |  |  | 1 | (16)
Net Cash Used in Financing Activities |  |  | (590) | (776)
Net Decrease in Cash and Cash Equivalents |  |  | 68 | 37
Cash and Cash Equivalents at Beginning of Period |  |  | 100 | 91
Cash and Cash Equivalents at End of Period | 168 | 128 | 168 | 128
Eliminations and Other |  |  |  |
Operating Activities |  |  |  |
Net Cash Provided by (Used in) Operating Activities |  |  | (438) | (396)
Investing Activities |  |  |  |
Property Additions |  |  | (115) | (159)
Purchase of Short-term Investments |  |  | 0 | 0
Proceeds from Sales of Short-term Investments |  |  | 45 | 25
Proceeds from Property Dispositions |  |  | 0 | 0
Other Investing Activities |  |  | (40) | 95
Net Cash Used in Investing Activities |  |  | (110) | (39)
Financing Activities |  |  |  |
Long-term Debt Issued |  |  | 0 | 0
Long-term Debt Repaid |  |  | 0 | 0
Dividends Paid |  |  | 563 | 428
Shares Repurchased |  |  | 0 | 0
Other Financing Activities |  |  | (12) | 1
Net Cash Used in Financing Activities |  |  | 551 | 429
Net Decrease in Cash and Cash Equivalents |  |  | 3 | (6)
Cash and Cash Equivalents at Beginning of Period |  |  | 59 | 62
Cash and Cash Equivalents at End of Period | $ 62 | $ 56 | $ 62 | $ 56

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- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3574-108585 + Details
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