XML 59 R22.htm IDEA: XBRL DOCUMENT

Cash Flow Information	9 Months Ended
Cash Flow Information	Sep. 30, 2011
Supplemental Cash Flow Information [Abstract]
Cash Flow Information	CASH FLOW INFORMATION We consider all highly liquid investments with purchased maturities of three months or less to be cash equivalents unless the investments are legally or contractually restricted for more than three months. We had non-cash investing activities related to the increase in property acquired under capital leases of $24.2 million for the nine months ended September 30, 2011. The effect of non-cash transactions is excluded from the accompanying Unaudited Condensed Consolidated Statements of Cash Flows. We made interest payments of $71.4 million during the nine months ended September 30, 2011, and $52.8 million during the nine months ended September 30, 2010. We made income tax payments, net of income tax refunds, of $95.2 million during the nine months ended September 30, 2011, and $75.0 million during the nine months ended September 30, 2010.