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TRANSACTIONS WITH RELATED PARTIES - Additional Information (Details) (Outside directors, Anadarko, USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Outside directors \| Anadarko
Related Party Transaction [Line Items]
Transactions with related party, revenue	$ 8.1	$ 12.0	$ 26.2	$ 26.2
Transactions with related party, receivables	$ 3.5		$ 3.5		$ 4.9

Amount of receivables arising from transactions with related parties due within one year or the normal operating cycle, if longer.

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- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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