v2.3.0.11
Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Millions
6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Operating Activities [Abstract]    
Net income $ 1,424 $ 1,227
Adjustments to reconcile net income to cash provided by operating activities [Abstract]    
Depreciation 796 735
Deferred income taxes and unrecognized bax benefits 459 119
Net gain on non-operating asset dispositions (5) (8)
Other operating activities, net (51) (165)
Changes in current assets and liabilities [Abstract]    
Accounts receivable, net (Note 10) (243) (584)
Materials and supplies. (96) (21)
Other current assets 95 75
Accounts payable and other current liabilities 261 317
Cash provided by operating activities 2,640 1,695
Investing Activities [Abstract]    
Capital investments (1,327) (1,056)
Proceeds from asset sales 30 31
Acquisition of equipment pending financing (85) 0
Proceeds from sale of assets financed 85 0
Other investing activities, net (69) (43)
Cash used in investing activities (1,366) (1,068)
Financing Activities [Abstract]    
Common share repurchases (Note 17) (608) (422)
Dividends paid (374) (272)
Debt exchange (272) 0
Debt repaid (131) (885)
Debt issued (Note 14) 0 400
Other financing activities, net 80 19
Cash used in financing activities (1,305) (1,160)
Net change in cash and cash equivalents (31) (533)
Cash and cash equivalents at beginning of year 1,086 1,850
Cash and cash equivalents at end of period 1,055 1,317
Non-cash investing and financing activities [Abstract]    
Cash dividends declared but not yet paid 228 163
Capital lease financings 120 0
Capital investments accrued but not yet paid 100 71
Common shares repurchased but not yet paid 0 44
Cash paid for [Abstract]    
Interest, net of amounts capitalized (315) (316)
Income taxes, net of refunds $ (135) $ (343)