ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)

12 Months Ended

Dec. 31, 2012

Schedule Of Components Of Other Comprehensive Loss

	Commodity Derivatives			Treasury Lock			Other			Accumulated Other Comprehensive Loss
	(millions of dollars)
Balance, December 31, 2009	$	(99	)	$	(22	)	$	(17	)	$	(138	)
Current year change		21			11			—			32
Balance, December 31, 2010		(78	)		(11	)		(17	)		(106	)
Current year change		49			1			(7	)		43
Balance, December 31, 2011		(29	)		(10	)		(24	)		(63	)
Current year change		23			—			(8	)		15
Balance, December 31, 2012	$	(6	)	$	(10	)	$	(32	)	$	(48	)

Schedule Of Income Tax Expense (Benefit) Allocated To Accumulated Other Comprehensive Income Loss

For the Year Ended:	Commodity Derivatives		Treasury Lock		Other			Accumulated Other Comprehensive Loss
	(millions of dollars)
December 31, 2010	$	14	$	7	$	—		$	21
December 31, 2011	$	32	$	—	$	(4	)	$	28
December 31, 2012	$	16	$	—	$	(6	)	$	10