Supplemental Cash Flow Information	6 Months Ended
Supplemental Cash Flow Information	Jun. 30, 2012
Supplemental Cash Flow Information [Abstract]
SUPPLEMENTAL CASH FLOW INFORMATION	SUPPLEMENTAL CASH FLOW INFORMATION During the six months ended June 30, 2012, we paid $118.0 million in interest, net of amounts capitalized, and paid $21.0 million in income taxes, net of refunds. During the six months ended June 30, 2011, we paid $125.1 million in interest, net of amounts capitalized, and received $49.4 million in net refunds from income taxes. As of June 30, 2012 and 2011, the amount of accounts payable related to capital expenditures was $18.8 million and $51.2 million, respectively. During the six months ended June 30, 2012 and 2011, total amortization of deferred revenue was $27.5 million and $26.9 million, respectively. During the six months ended June 30, 2012 and 2011, our equity in earnings from ATC was $31.8 million and $30.7 million, respectively. During the six months ended June 30, 2012 and 2011, distributions received from ATC were $25.8 million and $24.6 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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