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DEBT AND FINANCING COSTS - Financing Costs Net (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Debt Instrument [Line Items]
Interest expense	$ 132	$ 109	$ 371	$ 326
Amortization of deferred loan costs	2	1	5	4
Capitalized interest	(90)	(69)	(241)	(193)
Interest income	(4)	(4)	(10)	(14)
Financing costs, net	$ 40	$ 37	$ 125	$ 123

The net increase(decrease) in interest income during the period representing the allocation of deferred loan origination fees less deferred loan origination costs using the effective interest method over the term of the debt arrangement to which they pertain taking into account the effect of prepayments.

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