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Statements of Cash Flow Statements of Cash Flow	9 Months Ended
Statements of Cash Flow Statements of Cash Flow	Sep. 30, 2015
Supplemental Cash Flow Elements [Abstract]
Cash Flow, Supplemental Disclosures	Statements of Cash Flow Interest payments were $124,632,000 and $108,688,000 and income taxes paid were $96,364,000 and $238,030,000 in the three months ended September 30, 2015 and 2014, respectively.