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						68 Months Ended
	Oct. 17, 2013	Jul. 28, 2011	Mar. 21, 2014	Jan. 31, 2014	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Mar. 31, 2014
SCC share repurchase program:
Amount authorized for share repurchase program	$ 2,000	$ 1,000									$ 500
Total Number of Shares Purchased			106,079	1,768,000	1,874,079	10,245,000	4,442,336	9,034,400	15,600	4,912,000	28,510,150	59,033,565
Average Price Paid per Share (in dollars per share)			$ 27.04	$ 28.06	$ 28.00	$ 27.47	$ 33.17	$ 30.29	$ 29.69	$ 14.64	$ 13.49	$ 20.53
Total Number of Shares Purchased as Part of Publicly Announced Plan			59,033,565	58,927,486		57,159,486	46,914,486	42,472,150	33,437,750	33,422,150	28,510,150
Maximum Number of Shares that May Yet Be Purchased Under the Plan @ $29.11					27,070,666							27,070,666
Share purchase price under the plan (in dollars per share)					$ 29.11							$ 29.11
Total Cost			$ 2.9	$ 49.6	$ 52.5	$ 281.4	$ 147.3	$ 273.7	$ 0.5	$ 71.9	$ 384.7	$ 1,212.0
Percentage of ownership interest held by the parent company					82.50%							82.50%