EMPLOYEE BENEFIT PLANS (TABLES)

9 Months Ended

Sep. 30, 2012

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

Net periodic benefit costs recognized included the following components (in millions): 

	Three Months Ended September 30,
	Qualified						Nonqualified				Postretirement Medical
	2012			2011			2012		2011		2012			2011
Service cost	$	9.6		$	8.7		$	0.3	$	0.3	$	1.2		$	1.5
Interest cost	18.2			18.1			0.4		0.6		1.4			1.8
Expected return on assets	(23.2		)	(22.0		)	—		—		—			—
Amortization of prior service cost	(0.2		)	(0.3		)	—		—		0.1			—
Curtailment loss	—			—			—		0.2		—			—
Recognized actuarial loss	9.9			5.5			0.2		0.1		(0.1		)	0.3
Net periodic benefit costs	$	14.3		$	10.0		$	0.9	$	1.2	$	2.6		$	3.6

Net periodic benefit costs recognized included the following components (in millions): 

	Nine Months Ended September 30,
	Qualified						Nonqualified				Postretirement Medical
	2012			2011			2012		2011		2012			2011
Service cost	$	28.7		$	26.7		$	0.7	$	0.7	$	3.7		$	4.5
Interest cost	54.7			54.7			1.4		1.7		4.1			5.4
Expected return on assets	(69.7		)	(66.2		)	—		—		—			—
Amortization of prior service cost	(0.7		)	(0.7		)	—		—		0.4			0.2
Curtailment loss	—			—			—		0.2		—			—
Recognized actuarial loss	29.7			17.7			0.6		0.4		(0.4		)	0.9
Net periodic benefit costs	$	42.7		$	32.2		$	2.7	$	3.0	$	7.8		$	11.0