Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions	4 Months Ended	6 Months Ended	1 Months Ended
	Jun. 30, 2010 Successor	Jun. 30, 2011 Successor	Feb. 12, 2010 Predecessor
OPERATING ACTIVITIES
Net income	$ 885	$ 1,297	$ 224
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	661	896	192
Deferred income taxes	119	431	127
Long-term casualty and environmental liabilities, net	(59)	(27)	(2)
Contribution to defined benefit pension plan	(400)	0	0
Other, net	(121)	(136)	(78)
Changes in current assets and liabilities:
Accounts receivable, net	(159)	(77)	(21)
Materials and supplies	27	(78)	3
Other current assets	(11)	(157)	(123)
Accounts payable and other current liabilities	436	441	(258)
Net cash provided by operating activities	1,378	2,590	64
INVESTING ACTIVITIES
Capital expenditures excluding equipment	(741)	(1,101)	(137)
Acquisition of equipment	(249)	(261)	(67)
Other, net	(235)	(157)	68
Net cash used for investing activities	(1,225)	(1,519)	(136)
FINANCING ACTIVITIES
Proceeds from issuance of long-term debt	750	750	0
Payments on long-term debt	(99)	(116)	(30)
Cash distributions/dividends paid	(250)	(2,000)	(226)
Proceeds from stock options exercised	0	0	21
Excess tax benefits from equity compensation plans	0	0	9
Other, net	(10)	(9)	0
Net cash (used for) provided by financing activities	391	(1,375)	(226)
(Decrease) increase in cash and cash equivalents	544	(304)	(298)
Cash and cash equivalents:
Beginning of period	971	2,087	1,269
End of period	1,515	1,783	971
SUPPLEMENTAL CASH FLOW INFORMATION
Interest paid, net of amounts capitalized	211	329	97
Income taxes paid, net of refunds	393	(238)	0
Non-cash asset financing	$ 19	$ 1	$ 8