STOCKHOLDERS' EQUITY: (Details 2) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended		1 Months Ended					5 Months Ended	6 Months Ended	8 Months Ended	9 Months Ended	12 Months Ended		53 Months Ended
	May 31, 2012	Apr. 23, 2012	Oct. 31, 2012	Sep. 30, 2012	Aug. 31, 2012	Jun. 30, 2012	Jul. 31, 2011	Dec. 31, 2008	Oct. 14, 2010	Dec. 31, 2011	Sep. 30, 2009	Dec. 31, 2012	Dec. 31, 2008	Dec. 31, 2012
SCC share repurchase program:
Amount authorized for share repurchase program							$ 1,000						$ 500
Total Number of Shares Purchased	500,000	278,486	430,000	2,763,850	100,000	370,000		28,510,150	15,600	9,034,400	4,912,000	4,442,336		46,914,486
Average Price Paid per Share	$ 28.57	$ 30.23	$ 34.83	$ 34.71	$ 32.47	$ 28.33		$ 13.49	$ 29.69	$ 30.29	$ 14.64	$ 33.17		$ 18.72
Cumulative Number of Shares Purchased	43,250,636	42,750,636	46,914,486	46,484,486	43,720,636	43,620,636		28,510,150	33,437,750	42,472,150	33,422,150		28,510,150
Maximum Number of Shares that may yet be Purchased Under the Plan @ $37.86												3,220,925		3,220,925
Share purchase price under the plan (in dollars per share)												$ 37.86		$ 37.86
Total Cost	$ 14.3	$ 8.4	$ 15.0	$ 95.9	$ 3.2	$ 10.5		$ 384.7	$ 0.5	$ 273.7	$ 71.9	$ 147.3		$ 878.1
Percentage of ownership interest held by the parent company										80.90%		81.30%		81.30%