CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
COMPREHENSIVE INCOME:
Net income	$ 1,941,372	$ 2,344,353	$ 1,562,709
Other comprehensive income (loss) net of tax:
Decrease (increase) in pension and other post-retirement benefits (net of income tax of $(1.5) million, $4.7 million and $6.7 million)	(3,394)	8,310	12,179
Derivative instruments classified as cash flow hedge:
Decrease in prior period accumulated unrealized (gain) loss (net of income taxes of $3.5 million and $(71.4) million in 2012 and 2011, respectively)	(5,452)	125,562
Unrealized gain (loss) of the period (net of income tax of $(3.5) million and $71.4 million, in 2012 and 2011, respectively)		5,452	(125,562)
Unrealized net gain on derivative instruments classified as cash flow hedges	(5,452)	131,014	(125,562)
Total other comprehensive gain (loss)	(8,846)	139,324	(113,383)
Total comprehensive income	1,932,526	2,483,677	1,449,326
Comprehensive income attributable to the non-controlling interest	6,736	7,956	8,637
Comprehensive income attributable to SCC	$ 1,925,790	$ 2,475,721	$ 1,440,689