STOCKHOLDERS' EQUITY: (Details 2) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	1 Months Ended			3 Months Ended	5 Months Ended	6 Months Ended	7 Months Ended	8 Months Ended	9 Months Ended	12 Months Ended	59 Months Ended
	Jul. 28, 2011	Jun. 30, 2013	May 31, 2013	Apr. 30, 2013	Jun. 30, 2013	Dec. 31, 2008	Oct. 14, 2010	Oct. 31, 2012	Dec. 31, 2011	Sep. 30, 2009	Dec. 31, 2008	Jun. 30, 2013
SCC share repurchase program:
Amount authorized for share repurchase program	$ 1,000										$ 500
Total Number of Shares Purchased		1,350,000	782,800	1,500	2,134,300	28,510,150	15,600	4,442,336	9,034,400	4,912,000		49,048,786
Average Price Paid per Share		$ 29.05	$ 32.31	$ 32.96	$ 30.25	$ 13.49	$ 29.69	$ 33.17	$ 30.29	$ 14.64		$ 19.22
Total Number of Shares Purchased as Part of Publicly Announced Plan		49,048,786	47,698,786	46,915,986	49,048,786	28,510,150	33,437,750	46,914,486	42,472,150	33,422,150	28,510,150	49,048,786
Maximum Number of Shares that May Yet Be Purchased Under the Plan @ $27.62		2,077,643			2,077,643							2,077,643
Share purchase price under the plan (in dollars per share)		$ 27.62			$ 27.62							$ 27.62
Total Cost		$ 39.2	$ 25.2	$ 0.1	$ 64.5	$ 384.7	$ 0.5	$ 147.3	$ 273.7	$ 71.9		$ 942.6
Percentage of ownership interest held by the parent company		81.50%			81.50%							81.50%