Summarized Consolidating Income Statements (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 28, 2014	Mar. 29, 2013
Consolidated Income Statement
Revenue	$ 3,012	$ 2,963
Expense	2,273	2,083
Operating Income	739	880
Equity in Earnings of Subsidiaries	0	0
Interest (Expense) / Benefit	(140)	(147)
Other Income / (Expense) - Net	7	(3)
Earnings Before Income Taxes	606	730
Income Tax (Expense) / Benefit	(208)	(268)
Net Earnings	398	462
Total Comprehensive Earnings	414	479
CSX Corporation
Consolidated Income Statement
Revenue	0	0
Expense	(103)	(93)
Operating Income	103	93
Equity in Earnings of Subsidiaries	416	489
Interest (Expense) / Benefit	(130)	(134)
Other Income / (Expense) - Net	(2)	(1)
Earnings Before Income Taxes	387	447
Income Tax (Expense) / Benefit	11	15
Net Earnings	398	462
Total Comprehensive Earnings	414	479
CSX Transportation
Consolidated Income Statement
Revenue	2,992	2,946
Expense	2,393	2,217
Operating Income	599	729
Equity in Earnings of Subsidiaries	0	(1)
Interest (Expense) / Benefit	(14)	(17)
Other Income / (Expense) - Net	6	2
Earnings Before Income Taxes	591	713
Income Tax (Expense) / Benefit	(204)	(264)
Net Earnings	387	449
Total Comprehensive Earnings	393	449
Eliminations and Other
Consolidated Income Statement
Revenue	20	17
Expense	(17)	(41)
Operating Income	37	58
Equity in Earnings of Subsidiaries	(416)	(488)
Interest (Expense) / Benefit	4	4
Other Income / (Expense) - Net	3	(4)
Earnings Before Income Taxes	(372)	(430)
Income Tax (Expense) / Benefit	(15)	(19)
Net Earnings	(387)	(449)
Total Comprehensive Earnings	$ (393)	$ (449)