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Summarized Consolidating Financial Data - Consolidating Cash Flow Statements (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 25, 2016
Operating Activities |  |
Net Cash Provided by (Used in) Operating Activities | $ 1,043 | $ 754
Investing Activities |  |
Property Additions | (441) | (425)
Purchase of Short-term Investments | (75) | (235)
Proceeds from Sales of Short-term Investments | 205 | 670
Other Investing Activities | 25 | 31
Net Cash (Used in) Provided by Investing Activities | (286) | 41
Financing Activities |  |
Dividends Paid | (166) | (173)
Shares Repurchased | (258) | (249)
Other Financing Activities | (6) | (270)
Net Cash Used in Financing Activities | (430) | (692)
Net Increase in Cash and Cash Equivalents | 327 | 103
Cash and Cash Equivalents at Beginning of Period | 603 | 628
Cash and Cash Equivalents at End of Period | 930 | 731
CSX Corporation |  |
Operating Activities |  |
Net Cash Provided by (Used in) Operating Activities | 644 | 36
Investing Activities |  |
Property Additions | 0 | 0
Purchase of Short-term Investments | (75) | (235)
Proceeds from Sales of Short-term Investments | 205 | 670
Other Investing Activities | (1) | (1)
Net Cash (Used in) Provided by Investing Activities | 129 | 434
Financing Activities |  |
Dividends Paid | (166) | (173)
Shares Repurchased | (258) | (249)
Other Financing Activities | (6) | 1
Net Cash Used in Financing Activities | (430) | (421)
Net Increase in Cash and Cash Equivalents | 343 | 49
Cash and Cash Equivalents at Beginning of Period | 305 | 444
Cash and Cash Equivalents at End of Period | 648 | 493
CSX Transportation |  |
Operating Activities |  |
Net Cash Provided by (Used in) Operating Activities | 566 | 834
Investing Activities |  |
Property Additions | (397) | (391)
Purchase of Short-term Investments | 0 | 0
Proceeds from Sales of Short-term Investments | 0 | 0
Other Investing Activities | (24) | 26
Net Cash (Used in) Provided by Investing Activities | (421) | (365)
Financing Activities |  |
Dividends Paid | (150) | (150)
Shares Repurchased | 0 | 0
Other Financing Activities | (4) | (271)
Net Cash Used in Financing Activities | (154) | (421)
Net Increase in Cash and Cash Equivalents | (9) | 48
Cash and Cash Equivalents at Beginning of Period | 281 | 175
Cash and Cash Equivalents at End of Period | 272 | 223
Eliminations and Other |  |
Operating Activities |  |
Net Cash Provided by (Used in) Operating Activities | (167) | (116)
Investing Activities |  |
Property Additions | (44) | (34)
Purchase of Short-term Investments | 0 | 0
Proceeds from Sales of Short-term Investments | 0 | 0
Other Investing Activities | 50 | 6
Net Cash (Used in) Provided by Investing Activities | 6 | (28)
Financing Activities |  |
Dividends Paid | 150 | 150
Shares Repurchased | 0 | 0
Other Financing Activities | 4 | 0
Net Cash Used in Financing Activities | 154 | 150
Net Increase in Cash and Cash Equivalents | (7) | 6
Cash and Cash Equivalents at Beginning of Period | 17 | 9
Cash and Cash Equivalents at End of Period | $ 10 | $ 15

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3044-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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