DISTRIBUTIONS FROM NUSTAR ENERGY Narrative 2 (Details) (NuStar Energy [Member], USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
NuStar Energy [Member]
Distributions from NuStar Energy (dates and totals)
Quarterly cash distribution, date paid	2/14/2013
NuStar Energy's total cash distribution, paid	$ 98.1
Quarterly cash distribution per unit	$ 1.095	$ 4.380	$ 4.360	$ 4.280