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Supplemental Cash Flow Information (Details) (USD $)
9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Notes To Financial Statements [Abstract]  
Interest (1)$ 111,111,000$ 71,177,000
Income Taxes, Net of Refunds Received148,937,000187,484,000
Capitalized Interest44,000,00057,000,000
Accrued Capital Expenditures$ 747,000,000$ 679,000,000