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Cash Flow Information	6 Months Ended
	Jun. 30, 2014
Supplemental Cash Flow Information [Abstract]
Cash Flow Information	CASH FLOW INFORMATION We consider all highly liquid investments with a maturity of three months or less as of the date of purchase 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 $2.0 million for the six months ended June 30, 2014, and $7.3 million for the six months ended June 30, 2013. We also had accrued purchases of property and equipment of $13.8 million at June 30, 2014 and $7.3 million at June 30, 2013. The effect of non-cash transactions is excluded from the accompanying Unaudited Condensed Consolidated Statements of Cash Flows. We made interest payments of $67.8 million during the six months ended June 30, 2014, and $68.4 million during the six months ended June 30, 2013. We made income tax payments, net of income tax refunds, of $140.6 million during the six months ended June 30, 2014, and $112.9 million during the six months ended June 30, 2013.

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- Definition

The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

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