CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010	Dec. 25, 2009
Current Assets
Cash and Cash Equivalents (Note 1)	$ 784	$ 783	$ 1,292	$ 1,029
Short-term Investments	587	523
Accounts Receivable - Net (Note 1)	962	1,000
Materials and Supplies	274	240
Deferred Income Taxes	119	182
Other Current Assets	75	78
Total Current Assets	2,801	2,806
Properties	35,279	33,704
Accumulated Depreciation	(9,229)	(8,730)
Properties - Net (Note 6)	26,050	24,974
Other Long-term Assets	514	393
Total Assets	30,571	29,344
Current Liabilities
Accounts Payable	1,014	1,018
Labor and Fringe Benefits Payable	468	541
Casualty, Environmental and Other Reserves (Note 5)	140	167
Current Maturities of Long-term Debt (Note 9)	780	507
Income and Other Taxes Payable	85	129
Other Current Liabilities	140	196
Total Current Liabilities	2,627	2,558
Casualty, Environmental and Other Reserves (Note 5)	337	352
Long-term Debt (Note 9)	9,052	8,734
Deferred Income Taxes (Note 11)	8,096	7,601
Other Long-term Liabilities	1,457	1,631
Total Liabilities	21,569	20,876
Shareholders' Equity:
Common Stock, $1 Par Value (Note 3)	1,020	1,049
Other Capital	28	6
Retained Earnings (Note 1)	8,876	8,275
Accumulated Other Comprehensive Loss (Note 14)	(936)	(875)	(771)	(809)
Noncontrolling Minority Interest	14	13
Total Shareholders' Equity	9,002	8,468	8,700	8,768
Total Liabilities and Shareholders' Equity	30,571	29,344
Investments in Conrail
Current Assets
Investment in Affiliates and Joint Ventures	695	678
Affiliates and Other Companies
Current Assets
Investment in Affiliates and Joint Ventures	$ 511	$ 493