STOCKHOLDERS' EQUITY: (Details 2) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	1 Months Ended										3 Months Ended				12 Months Ended							65 Months Ended
	Jul. 28, 2011	Dec. 31, 2013		Nov. 30, 2013	Oct. 31, 2013	Sep. 30, 2013	Aug. 31, 2013	Jul. 31, 2013	Jun. 30, 2013	May 31, 2013	Apr. 30, 2013	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2013
SCC share repurchase program:
Amount authorized for share repurchase program	$ 1,000.0															$ 2,000.0						$ 500.0
Total Number of Shares Purchased		1,942,398		2,446,490	1,552,100	204,012	641,400	1,300,000	1,350,000	807,100	1,500	5,940,988		2,145,412	2,158,600			4,442,336	9,034,400	15,600	4,912,000	28,510,150	57,159,486
Average Price Paid per Share		$ 25.58		$ 26.49	$ 27.68	$ 27.65	$ 26.68	$ 27.60	$ 29.05	$ 32.33	$ 32.96	$ 26.50		$ 27.33	$ 30.28			$ 33.17	$ 30.29	$ 29.69	$ 14.64	$ 13.49	$ 20.29
Total Number of Shares Purchased as Part of Publicly Announced Plan		57,159,486		55,217,088	52,770,598	51,218,498	51,014,486	50,373,086	49,073,086	47,723,086	46,915,986	57,159,486		51,218,498	49,073,086	57,159,486		46,914,486	42,472,150	33,437,750	33,422,150	28,510,150	57,159,486
Maximum Number of Shares that May Yet Be Purchased Under the Plan @ $28.71		29,275,745	[1]									29,275,745	[1]			29,275,745	[1]						29,275,745	[1]
Share purchase price under the plan (in dollars per share)		$ 28.71										$ 28.71				$ 28.71							$ 28.71
Total Cost		$ 49.7		$ 64.8	$ 42.9	$ 5.6	$ 17.1	$ 35.9	$ 39.2	$ 26.1	$ 0.1	$ 157.4		$ 58.6	$ 65.4			$ 147.3	$ 273.7	$ 0.5	$ 71.9	$ 384.7	$ 1,159.5
Percentage of ownership interest held by the parent company		82.30%										82.30%				82.30%		81.30%					82.30%

[1] NYSE closing price of SCC common shares at December 31, 2013