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Consolidated Statements of Income (Unaudited) (USD $)
In Millions
3 Months Ended7 Months Ended9 Months Ended1 Months Ended
Sep. 30, 2011
Successor
Sep. 30, 2010
Successor
Sep. 30, 2010
Successor
Sep. 30, 2011
Successor
Feb. 12, 2010
Predecessor
Revenues$ 4,961$ 4,391$ 10,558$ 14,284$ 1,791
Operating expenses:     
Compensation and benefits1,0691,0192,5223,216442
Fuel1,0897481,8403,124329
Purchased services5715421,3071,667279
Depreciation and amortization4544351,0961,350192
Equipment rents19219548457597
Materials and other2061914236591
Total operating expenses3,5813,1307,67210,5911,340
Operating income1,3801,2612,8863,693451
Interest expense14213230541672
Other expense, net22462
Income before income taxes1,2361,1272,5773,271377
Income tax expense4704219861,208153
Net income$ 766$ 706$ 1,591$ 2,063$ 224