Summarized Consolidating Income Statement (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 24, 2010	Sep. 30, 2011	Sep. 24, 2010
Consolidated Income Statement
Revenue	$ 2,963	$ 2,666	$ 8,792	$ 7,820
Operating Expenses	2,085	1,841	6,215	5,595
Operating Income	878	825	2,577	2,225
Equity in Earnings of Subsidiaries	0	0	0	0
Interest (Expense) / Benefit	(138)	(131)	(412)	(408)
Other Income - Net	6	8	11	28
Earnings Before Income Taxes	746	702	2,176	1,845
Income Tax Expense	(282)	(288)	(811)	(712)
Net Earnings	464	414	1,365	1,133
CSX Corporation
Consolidated Income Statement
Revenue	0	0	0	0
Operating Expenses	(77)	(46)	(210)	(129)
Operating Income	77	46	210	129
Equity in Earnings of Subsidiaries	500	492	1,472	1,381
Interest (Expense) / Benefit	(123)	(119)	(370)	(367)
Other Income - Net	3	4	11	13
Earnings Before Income Taxes	457	423	1,323	1,156
Income Tax Expense	7	(9)	42	(23)
Net Earnings	464	414	1,365	1,133
CSX Transportation
Consolidated Income Statement
Revenue	2,946	2,650	8,743	7,139
Operating Expenses	2,220	1,841	6,584	5,120
Operating Income	726	809	2,159	2,019
Equity in Earnings of Subsidiaries	(1)	0	2	0
Interest (Expense) / Benefit	(19)	(22)	(64)	(77)
Other Income - Net	6	17	8	55
Earnings Before Income Taxes	712	804	2,105	1,997
Income Tax Expense	(266)	(327)	(782)	(772)
Net Earnings	446	477	1,323	1,225
Eliminations
Consolidated Income Statement
Revenue	17	16	49	681
Operating Expenses	(58)	46	(159)	604
Operating Income	75	(30)	208	77
Equity in Earnings of Subsidiaries	(499)	(492)	(1,474)	(1,381)
Interest (Expense) / Benefit	4	10	22	36
Other Income - Net	(3)	(13)	(8)	(40)
Earnings Before Income Taxes	(423)	(525)	(1,252)	(1,308)
Income Tax Expense	(23)	48	(71)	83
Net Earnings	$ (446)	$ (477)	$ (1,323)	$ (1,225)