CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Sep. 27, 2013	Dec. 28, 2012	Sep. 28, 2012	Dec. 30, 2011
Current Assets
Cash and Cash Equivalents	$ 591	$ 784	$ 693	$ 783
Short-term Investments	128	587
Accounts Receivable - Net (Note 1)	981	962
Materials and Supplies	267	274
Deferred Income Taxes	148	119
Other Current Assets	85	75
Total Current Assets	2,200	2,801
Properties	36,637	35,279
Accumulated Depreciation	(9,691)	(9,229)
Properties - Net	26,946	26,050
Other Long-term Assets	556	514
Total Assets	30,943	30,571
Current Liabilities
Accounts Payable	1,078	1,014
Labor and Fringe Benefits Payable	511	468
Current Maturities of Long-term Debt (Note 7)	264	780
Income and Other Taxes Payable	138	85
Other Current Liabilities	111	140
Total Current Liabilities	2,251	2,627
Long-term Debt (Note 7)	8,787	9,052
Deferred Income Taxes	8,387	8,096
Other Long-term Liabilities	1,366	1,457
Total Liabilities	21,075	21,569
Common Stock $1 Par Value	1,014	1,020
Other Capital	50	28
Retained Earnings	9,670	8,876
Accumulated Other Comprehensive Loss (Note 10)	(886)	(936)
Noncontrolling Interest	20	14
Total Shareholders' Equity	9,868	9,002
Total Liabilities and Shareholders' Equity	30,943	30,571
Casualty, Environmental and Other [Member]
Current Liabilities
Casualty, Environment and Otehr Reserves	149	140
Casualty, Environemnt and Other Reserves (Note 4)	284	337
Investments in Conrail [Member]
Current Assets
Investment in Affiliates and Joint Ventures	715	695
Affiliates and Other Companies [Member]
Current Assets
Investment in Affiliates and Joint Ventures	$ 526	$ 511