Summarized Consolidating Income Statements (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Sep. 26, 2014	Sep. 27, 2013
Consolidated Income Statement
Revenue	$ 3,221	$ 2,985	$ 9,477	$ 8,994
Expense	2,245	2,145	6,765	6,334
Operating Income	976	840	2,712	2,660
Equity in Earnings of Subsidiaries	0	0	0	0
Interest (Expense) / Benefit	(137)	(136)	(412)	(423)
Other Income / (Expense) - Net	(26)	5	(31)	11
Earnings Before Income Taxes	813	709	2,269	2,248
Income Tax (Expense) / Benefit	(304)	(254)	(833)	(810)
Net Earnings	509	455	1,436	1,438
Total Comprehensive Earnings	518	471	1,476	1,488
CSX Corporation
Consolidated Income Statement
Revenue	0	0	0	0
Expense	(113)	(98)	(321)	(283)
Operating Income	113	98	321	283
Equity in Earnings of Subsidiaries	527	483	1,488	1,508
Interest (Expense) / Benefit	(133)	(125)	(389)	(387)
Other Income / (Expense) - Net	(12)	(2)	(17)	(5)
Earnings Before Income Taxes	495	454	1,403	1,399
Income Tax (Expense) / Benefit	14	1	33	39
Net Earnings	509	455	1,436	1,438
Total Comprehensive Earnings	518	471	1,476	1,488
CSX Transportation
Consolidated Income Statement
Revenue	3,202	2,965	9,417	8,938
Expense	2,368	2,247	7,121	6,677
Operating Income	834	718	2,296	2,261
Equity in Earnings of Subsidiaries	1	0	1	(1)
Interest (Expense) / Benefit	(11)	(15)	(39)	(47)
Other Income / (Expense) - Net	(9)	2	(13)	1
Earnings Before Income Taxes	815	705	2,245	2,214
Income Tax (Expense) / Benefit	(309)	(254)	(831)	(812)
Net Earnings	506	451	1,414	1,402
Total Comprehensive Earnings	507	453	1,422	1,406
Eliminations and Other
Consolidated Income Statement
Revenue	19	20	60	56
Expense	(10)	(4)	(35)	(60)
Operating Income	29	24	95	116
Equity in Earnings of Subsidiaries	(528)	(483)	(1,489)	(1,507)
Interest (Expense) / Benefit	7	4	16	11
Other Income / (Expense) - Net	(5)	5	(1)	15
Earnings Before Income Taxes	(497)	(450)	(1,379)	(1,365)
Income Tax (Expense) / Benefit	(9)	(1)	(35)	(37)
Net Earnings	(506)	(451)	(1,414)	(1,402)
Total Comprehensive Earnings	$ (507)	$ (453)	$ (1,422)	$ (1,406)