Supplemental Cash Flow Information	3 Months Ended
Supplemental Cash Flow Information	Mar. 31, 2013
Supplemental Cash Flow Information [Abstract]
SUPPLEMENTAL CASH FLOW INFORMATION	SUPPLEMENTAL CASH FLOW INFORMATION During the three months ended March 31, 2013, we paid $21.7 million in interest, net of amounts capitalized, and paid $2.0 million in income taxes, net of refunds. During the three months ended March 31, 2012, we paid $26.5 million in interest, net of amounts capitalized, and paid $15.3 million in income taxes, net of refunds. As of March 31, 2013 and 2012, the amount of accounts payable related to capital expenditures was $8.9 million and $12.6 million, respectively. During the three months ended March 31, 2013 and 2012, total amortization of deferred revenue was $14.9 million and $13.7 million, respectively. During the three months ended March 31, 2013 and 2012, our equity in earnings from ATC was $16.6 million and $15.6 million, respectively. During the three months ended March 31, 2013 and 2012, distributions received from ATC were $13.3 million and $12.9 million, respectively.

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.

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