Delaware		41-1804964
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification No.)

Class		Shares Outstanding at July 19, 2002
Common stock, $.01 par value		380,525,605 shares

		Three Months Ended June 30,							Six Months Ended June 30,
		2002				2001			2002				2001
Revenues		$	2,207			$	2,271		$	4,370			$	4,564
Operating expenses:
Compensation and benefits			696				694			1,410				1,423
Purchased services			279				274			553				536
Depreciation and amortization			231				230			461				458
Equipment rents			179				190			355				377
Fuel			207				246			391				503
Materials and other			210				209			427				420
Total operating expenses			1,802				1,843			3,597				3,717
Operating income			405				428			773				847
Interest expense			105				115			214				235
Other (income) expense, net			(10	)			5			(26	)			78
Income before income taxes and extraordinary charge			310				308			585				534
Income tax expense			116				113			219				199
Income before extraordinary charge		$	194			$	195		$	366			$	335
Extraordinary charge, net			—				—			—				(6	)
Net income		$	194			$	195		$	366			$	329
Earnings per share:
Basic earnings per share (before extraordinary charge)		$	0.51			$	0.50		$	0.96			$	0.86
Basic earnings per share (after extraordinary charge)		$	0.51			$	0.50		$	0.96			$	0.85
Diluted earnings per share (before extraordinary charge)		$	0.51			$	0.50		$	0.95			$	0.85
Diluted earnings per share (after extraordinary charge)		$	0.51			$	0.50		$	0.95			$	0.84
Average shares (in millions):
Basic			379.7				389.0			381.1				389.2
Dilutive effect of stock awards			2.6				4.8			2.8				4.7
Diluted			382.3				393.8			383.9				393.9
Dividends declared per share		$	0.12			$	0.12		$	0.24			$	0.24

		June 30, 2002				December 31, 2001
Assets
Current assets:
Cash and cash equivalents		$	178			$	26
Accounts receivable, net			197				172
Materials and supplies			217				191
Current portion of deferred income taxes			328				306
Other current assets			138				28
Total current assets			1,058				723
Property and equipment, net			23,503				23,110
Other assets			920				888
Total assets		$	25,481			$	24,721
Liabilities And Stockholders’ Equity
Current liabilities:
Accounts payable and other current liabilities		$	1,903			$	1,873
Long-term debt due within one year			291				288
Total current liabilities			2,194				2,161
Long-term debt and commercial paper			6,714				6,363
Deferred income taxes			6,958				6,731
Casualty and environmental liabilities			432				423
Employee merger and separation costs			184				216
Other liabilities			998				978
Total liabilities			17,480				16,872
Commitments and contingencies (see notes 2, 6, and 8)
Stockholders’ equity:
Common stock, $.01 par value, 600,000 shares authorized; 496,222 shares and 492,818 shares issued, respectively			5				5
Additional paid-in capital			5,662				5,584
Retained earnings			5,322				5,048
Treasury stock, at cost, 114,964 shares and 107,041 shares, respectively			(2,955	)			(2,745	)
Unearned compensation			(50	)			(34	)
Accumulated other comprehensive income (deficit)			17				(9	)
Total stockholders’ equity			8,001				7,849
Total liabilities and stockholders’ equity		$	25,481			$	24,721

		Six Months Ended June 30,
		2002				2001
Operating Activities:
Net income		$	366			$	329
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization			461				458
Deferred income taxes			190				107
Extraordinary charge			—				9
Employee merger and separation costs paid			(31	)			(27	)
Other, net			(33	)			50
Changes in current assets and liabilities:
Accounts receivable, net			(25	)			52
Materials and supplies			(15	)			6
Other current assets			(46	)			39
Accounts payable and other current liabilities			15				(92	)
Net cash provided by operating activities			882				931
Investing Activities:
Capital expenditures			(641	)			(637	)
Other, net			(98	)			(16	)
Net cash used for investing activities			(739	)			(653	)
Financing Activities:
Net increase (decrease) in commercial paper and bank borrowings			41				(326	)
Proceeds from issuance of long-term debt