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Summarized Consolidating Financial Data (Consolidating Cash Flow Statements) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Operating Activities |  |  |
Net Cash Provided by (Used in) Operating Activities | $ 4,850 | $ 4,641 | $ 3,472
Investing Activities |  |  |
Property Additions | (1,657) | (1,745) | (2,040)
Purchase of Short-term Investments | (2,838) | (736) | (782)
Proceeds from Sales of Short-term Investments | 2,108 | 505 | 1,193
Proceeds from Property Dispositions | 254 | 319 | 97
Other Investing Activities | 31 | (27) | 37
Net Cash Used in Investing Activities | (2,102) | (1,684) | (1,495)
Financing Activities |  |  |
Long-term Debt Issued | 2,000 | 3,000 | 850
Long-term Debt Repaid | (518) | (19) | (333)
Dividends Paid | (763) | (751) | (708)
Shares Repurchased | (3,373) | (4,671) | (1,970)
Other Financing Activities | 6 | (59) | (18)
Net Cash Used in Financing Activities | (2,648) | (2,500) | (2,179)
Net Increase (Decrease) in Cash and Cash Equivalents | 100 | 457 | (202)
Cash and Cash Equivalents at Beginning of Period | 858 | 401 | 603
Cash and Cash Equivalents at End of Period | 958 | 858 | 401
Eliminations and Other |  |  |
Operating Activities |  |  |
Net Cash Provided by (Used in) Operating Activities | (862) | (198) | (359)
Investing Activities |  |  |
Property Additions | (151) | (165) | (192)
Purchase of Short-term Investments | 0 | (2) | (8)
Proceeds from Sales of Short-term Investments | 3 | 20 | 3
Proceeds from Property Dispositions | 0 | 0 | 0
Other Investing Activities | 6 | (661) | (55)
Net Cash Used in Investing Activities | (142) | (808) | (252)
Financing Activities |  |  |
Long-term Debt Issued | 0 | 0 | 0
Long-term Debt Repaid | 0 | 0 | 0
Dividends Paid | 1,000 | 1,000 | 600
Shares Repurchased | 0 | 0 | 0
Other Financing Activities | 0 | 12 | 0
Net Cash Used in Financing Activities | 1,000 | 1,012 | 600
Net Increase (Decrease) in Cash and Cash Equivalents | (4) | 6 | (11)
Cash and Cash Equivalents at Beginning of Period | 12 | 6 | 17
Cash and Cash Equivalents at End of Period | 8 | 12 | 6
CSX Corporation |  |  |
Operating Activities |  |  |
Net Cash Provided by (Used in) Operating Activities | 3,440 | 3,182 | 1,719
Investing Activities |  |  |
Property Additions | 0 | 0 | 0
Purchase of Short-term Investments | (2,838) | (734) | (774)
Proceeds from Sales of Short-term Investments | 2,105 | 485 | 1,190
Proceeds from Property Dispositions | 0 | 0 | 0
Other Investing Activities | 15 | (4) | (2)
Net Cash Used in Investing Activities | (718) | (253) | 414
Financing Activities |  |  |
Long-term Debt Issued | 2,000 | 3,000 | 850
Long-term Debt Repaid | (500) | 0 | (313)
Dividends Paid | (763) | (751) | (708)
Shares Repurchased | (3,373) | (4,671) | (1,970)
Other Financing Activities | 12 | (65) | (23)
Net Cash Used in Financing Activities | (2,624) | (2,487) | (2,164)
Net Increase (Decrease) in Cash and Cash Equivalents | 98 | 442 | (31)
Cash and Cash Equivalents at Beginning of Period | 716 | 274 | 305
Cash and Cash Equivalents at End of Period | 814 | 716 | 274
CSX Transportation |  |  |
Operating Activities |  |  |
Net Cash Provided by (Used in) Operating Activities | 2,272 | 1,657 | 2,112
Investing Activities |  |  |
Property Additions | (1,506) | (1,580) | (1,848)
Purchase of Short-term Investments | 0 | 0 | 0
Proceeds from Sales of Short-term Investments | 0 | 0 | 0
Proceeds from Property Dispositions | 254 | 319 | 97
Other Investing Activities | 10 | 638 | 94
Net Cash Used in Investing Activities | (1,242) | (623) | (1,657)
Financing Activities |  |  |
Long-term Debt Issued | 0 | 0 | 0
Long-term Debt Repaid | (18) | (19) | (20)
Dividends Paid | (1,000) | (1,000) | (600)
Shares Repurchased | 0 | 0 | 0
Other Financing Activities | (6) | (6) | 5
Net Cash Used in Financing Activities | (1,024) | (1,025) | (615)
Net Increase (Decrease) in Cash and Cash Equivalents | 6 | 9 | (160)
Cash and Cash Equivalents at Beginning of Period | 130 | 121 | 281
Cash and Cash Equivalents at End of Period | $ 136 | $ 130 | $ 121

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