Summarized Consolidating Balance Sheet (Details) (USD $)
In Millions
Jul. 01, 2011
Dec. 31, 2010
Jun. 25, 2010
Dec. 25, 2009
Current Assets        
Cash and Cash Equivalents $ 1,252 $ 1,292 $ 633 $ 1,029
Short-term Investments 43 54    
Accounts Receivable - Net 1,112 993    
Receivable from Affiliates 0 0    
Materials and Supplies 251 218    
Deferred Income Taxes 186 192    
Other Current Assets 123 106    
Total Current Assets 2,967 2,855    
Properties 32,777 32,065    
Accumulated Depreciation (8,575) (8,266)    
Properties - Net 24,202 23,799    
Investments in Conrail 681 673    
Affiliates and Other Companies 477 461    
Investments in Consolidated Subsidiaries 0 0    
Other Long-term Assets 378 353    
Total Assets 28,705 28,141    
Current Liabilities        
Accounts Payable 1,076 1,046    
Labor and Fringe Benefits Payable 430 520    
Payable to Affiliates 0 0    
Casualty, Environmental and Other Reserves 180 176    
Current Maturities of Long-term Debt 494 613    
Income and Other Taxes Payable 137 85    
Other Current Liabilities 168 97    
Total Current Liabilities 2,485 2,537    
Casualty, Evironmental and Other Reserves 468 502    
Long-term Debt 8,186 8,051    
Deferred Income Taxes 7,340 7,053    
Other Long-term Liabilities 1,285 1,298    
Total Liabilities 19,764 19,441    
Shareholders' Equity        
Common Stock, $1 Par Value 1,095 370    
Other Capital 0 0    
Retained Earnings 8,582 9,087    
Accumulated Other Comprehensive Loss (747) (771)    
Noncontrolling Interest 11 14    
Total Shareholders' Equity 8,941 8,700    
Total Liabilities and Shareholders' Equity 28,705 28,141    
CSX Corporation
        
Current Assets        
Cash and Cash Equivalents 988 1,100 435 918
Short-term Investments 0 0    
Accounts Receivable - Net 5 5    
Receivable from Affiliates 1,158 1,048    
Materials and Supplies 0 0    
Deferred Income Taxes 0 15    
Other Current Assets 76 46    
Total Current Assets 2,227 2,214    
Properties 8 8    
Accumulated Depreciation (8) (8)    
Properties - Net 0 0    
Investments in Conrail 0 0    
Affiliates and Other Companies 0 0    
Investments in Consolidated Subsidiaries 16,926 16,278    
Other Long-term Assets 167 174    
Total Assets 19,320 18,666    
Current Liabilities        
Accounts Payable 107 116    
Labor and Fringe Benefits Payable 34 42    
Payable to Affiliates 2,251 1,942    
Casualty, Environmental and Other Reserves 0 0    
Current Maturities of Long-term Debt 405 517    
Income and Other Taxes Payable 465 378    
Other Current Liabilities 0 0    
Total Current Liabilities 3,262 2,995    
Casualty, Evironmental and Other Reserves 0 0    
Long-term Debt 7,008 6,815    
Deferred Income Taxes (572) (526)    
Other Long-term Liabilities 693 696    
Total Liabilities 10,391 9,980    
Shareholders' Equity        
Common Stock, $1 Par Value 1,095 370    
Other Capital 0 0    
Retained Earnings 8,582 9,087    
Accumulated Other Comprehensive Loss (748) (771)    
Noncontrolling Interest 0 0    
Total Shareholders' Equity 8,929 8,686    
Total Liabilities and Shareholders' Equity 19,320 18,666    
CSX Transportation
        
Current Assets        
Cash and Cash Equivalents 190 118 97 30
Short-term Investments 0 0    
Accounts Receivable - Net 428 447    
Receivable from Affiliates 1,443 943    
Materials and Supplies 251 218    
Deferred Income Taxes 181 171    
Other Current Assets 67 56    
Total Current Assets 2,560 1,953    
Properties 31,206 30,557    
Accumulated Depreciation (7,683) (7,405)    
Properties - Net 23,523 23,152    
Investments in Conrail 0 0    
Affiliates and Other Companies 558 595    
Investments in Consolidated Subsidiaries 0 0    
Other Long-term Assets 108 110    
Total Assets 26,749 25,810    
Current Liabilities        
Accounts Payable 938 904    
Labor and Fringe Benefits Payable 373 431    
Payable to Affiliates 568 401    
Casualty, Environmental and Other Reserves 165 161    
Current Maturities of Long-term Debt 87 94    
Income and Other Taxes Payable 126 109    
Other Current Liabilities 167 96    
Total Current Liabilities 2,424 2,196    
Casualty, Evironmental and Other Reserves 383 411    
Long-term Debt 1,178 1,235    
Deferred Income Taxes 7,485 7,228    
Other Long-term Liabilities 515 525    
Total Liabilities 11,985 11,595    
Shareholders' Equity        
Common Stock, $1 Par Value 181 181    
Other Capital 5,648 5,634    
Retained Earnings 8,980 8,443    
Accumulated Other Comprehensive Loss (64) (65)    
Noncontrolling Interest 19 22    
Total Shareholders' Equity 14,764 14,215    
Total Liabilities and Shareholders' Equity 26,749 25,810    
Eliminations
        
Current Assets        
Cash and Cash Equivalents 74 74 101 81
Short-term Investments 43 54    
Accounts Receivable - Net 679 541    
Receivable from Affiliates (2,601) (1,991)    
Materials and Supplies 0 0    
Deferred Income Taxes 5 6    
Other Current Assets (20) 4    
Total Current Assets (1,820) (1,312)    
Properties 1,563 1,500    
Accumulated Depreciation (884) (853)    
Properties - Net 679 647    
Investments in Conrail 681 673    
Affiliates and Other Companies (81) (134)    
Investments in Consolidated Subsidiaries (16,926) (16,278)    
Other Long-term Assets 103 69    
Total Assets (17,364) (16,335)    
Current Liabilities        
Accounts Payable 31 26    
Labor and Fringe Benefits Payable 23 47    
Payable to Affiliates (2,819) (2,343)    
Casualty, Environmental and Other Reserves 15 15    
Current Maturities of Long-term Debt 2 2    
Income and Other Taxes Payable (454) (402)    
Other Current Liabilities 1 1    
Total Current Liabilities (3,201) (2,654)    
Casualty, Evironmental and Other Reserves 85 91    
Long-term Debt 0 1    
Deferred Income Taxes 427 351    
Other Long-term Liabilities 77 77    
Total Liabilities (2,612) (2,134)    
Shareholders' Equity        
Common Stock, $1 Par Value (181) (181)    
Other Capital (5,648) (5,634)    
Retained Earnings (8,980) (8,443)    
Accumulated Other Comprehensive Loss 65 65    
Noncontrolling Interest (8) (8)    
Total Shareholders' Equity (14,752) (14,201)    
Total Liabilities and Shareholders' Equity $ (17,364) $ (16,335)   Â