CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 30, 2016
Current Assets:
Cash and Cash Equivalents	$ 1,980	$ 401	$ 930	$ 603
Short-term Investments	10	18
Accounts Receivable - Net (Note 11)	1,045	970
Materials and Supplies	369	372
Other Current Assets	138	154
Total Current Assets	3,542	1,915
Properties	44,103	44,324
Accumulated Depreciation	(12,355)	(12,560)
Properties - Net	31,748	31,764
Other Long-term Assets	435	374
Total Assets	37,439	35,739
Current Liabilities:
Accounts Payable	905	847
Labor and Fringe Benefits Payable	443	602
Casualty, Environmental and Other Reserves (Note 4)	106	108
Current Maturities of Long-term Debt (Note 7)	19	19
Income and Other Taxes Payable	274	157
Other Current Liabilities	144	161
Total Current Liabilities	1,891	1,894
Casualty, Environmental and Other Reserves (Note 4)	258	266
Long-term Debt (Note 7)	13,768	11,790
Deferred Income Taxes - Net	6,485	6,418
Other Long-term Liabilities	646	650
Total Liabilities	23,048	21,018
Shareholders' Equity:
Common Stock, $1 Par Value	875	890
Other Capital	215	217
Retained Earnings	13,873	14,084
Accumulated Other Comprehensive Loss (Note 10)	(585)	(486)
Noncontrolling Interest	13	16
Total Shareholders' Equity	14,391	14,721
Total Liabilities and Shareholders' Equity	37,439	35,739
Investments in Conrail
Current Assets:
Investment in Affiliates and Other Companies	918	907
Affiliates and Other Companies
Current Assets:
Investment in Affiliates and Other Companies	$ 796	$ 779

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.