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Pension and Postretirement Health and Life Benefits (Tables)

12 Months Ended

Dec. 31, 2012

Pension and Postretirement Health and Life Benefits

Schedule of Changes in Projected Benefit Obligations [Table Text Block]

		Defined Benefit Pension Plans								Postretirement Health and Life Benefit Plans
		Years Ended December 31,								Years Ended December 31,
Changes in Benefit Obligations:		2012				2011				2012				2011
Obligations at beginning of year		$	989.5			$	876.8			$	252.9			$	230.6
Actuarial (gains) losses, net			104.6				93.4				(7.2	)			14.7
Service costs			14.6				16.2				3.7				4.3
Interest costs			48.3				50.3				11.1				12.2
Gross benefits paid			(58.0	)			(50.4	)			(12.3	)			(11.5	)
Less federal subsidy on benefits paid			-				-				0.6				0.7
Curtailment losses			-				3.2				-				1.9
Obligations at end of year			1,099.0				989.5				248.8				252.9
Changes in Plan Assets:
Fair value of plan assets at beginning of year			727.8				728.5				45.1				51.9
Actual return on plan assets			91.3				34.1				5.8				(1.8	)
USEC contributions			13.7				15.6				3.0				6.5
Benefits paid			(58.0	)			(50.4	)			(12.3	)			(11.5	)
Fair value of plan assets at end of year			774.8				727.8				41.6				45.1
(Unfunded) status at end of year			(324.2	)			(261.7	)			(207.2	)			(207.8	)
Amounts recognized in assets and liabilities:
Current liabilities		$	(2.5	)		$	(3.4	)		$	-			$	-
Noncurrent liabilities			(321.7	)			(258.3	)			(207.2	)			(207.8	)
		$	(324.2	)		$	(261.7	)		$	(207.2	)		$	(207.8	)
Amounts recognized in accumulated other comprehensive income, pre-tax:
Net actuarial loss		$	326.0			$	280.5			$	45.3			$	59.9
Prior service cost (credit)			1.7				3.2				-				-
		$	327.7			$	283.7			$	45.3			$	59.9

Schedule of Net Benefit Costs

		Defined Benefit Pension Plans												Postretirement Health and Life Benefit Plans
(in millions)		Years Ended December 31,												Years Ended December 31,
		2012				2011				2010				2012				2011				2010
Net Periodic Benefit Costs
Service costs		$	14.6			$	16.2			$	19.3			$	3.7			$	4.3			$	5.0
Interest costs			48.3				50.3				48.9				11.1				12.2				11.9
Expected return on plan assets (gains)			(52.0	)			(54.0	)			(48.7	)			(2.9	)			(3.7	)			(3.6	)
Amortization of prior service costs (credits)			1.5				1.7				1.8				-				-				(8.5	)
Amortization of actuarial (gains) losses, net			19.7				9.4				16.0				4.5				2.6				2.7
Curtailment losses			-				3.2				0.4				-				1.9				-
Net periodic benefit costs		$	32.1			$	26.8			$	37.7			$	16.4			$	17.3			$	7.5

Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss)
Net valuation (gain) loss		$	65.2			$	115.4			$	(36.7	)		$	(10.1	)		$	20.8			$	3.2
Amortization of actuarial (gains) losses, net			(19.7	)			(11.6	)			(16.0	)			(4.5	)			(4.6	)			(2.7	)
Amortization of prior service costs (credits)			(1.5	)			(1.6	)			(2.2	)			-				-				8.5
Total (gain) loss recognized in other comprehensive income (loss), pre-tax		$	44.0			$	102.2			$	(54.9	)		$	(14.6	)		$	16.2			$	9.0
Total (gain) loss recognized in net periodic benefit costs (income) and other comprehensive income (loss), pre-tax		$	76.1			$	129.0			$	(17.2	)		$	1.8			$	33.5			$	16.5

Schedule of Assumptions Used [Table Text Block]

Assumptions used to determine net periodic benefit costs:
Discount rate			4.95	%			5.77	%			5.84	%			4.46	%			5.32	%			5.44	%
Expected return on plan assets			7.25				7.50				7.50				7.25				7.50				7.50
Compensation increases			4.25				4.25				4.25				4.25				4.25				4.25

Schedule of Health Care Cost Trend Rates [Table Text Block]

		December 31,
		2012				2011
Healthcare cost trend rate for the following year			7.50	%			8.00	%
Long-term rate that the healthcare cost trend rate gradually declines to			5	%			5	%
Year that the healthcare cost trend rate is expected to reach the long-term rate			2018				2018

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]

		One Percentage Point
		Increase				Decrease
Postretirement health benefit obligation		$	7.3			$	(6.9	)
Net periodic benefit costs		$	0.8			$	(0.7	)

Schedule of Allocation of Plan Assets [Table Text Block]

	Percentage of Plan Assets		Target Allocation Range
	December 31,
	2012	2011	2013
Defined Benefit Pension Plans:
Equity securities	52%	50%	40 -	- 60%
Debt securities	48	50	40 -	- 60
	100%	100%
Postretirement Health and Life Benefit Plans:
Equity securities	65%	69%	55 -	- 75%
Debt securities	35	31	25 -	45
	100%	100%

Schedule of Fair Value of Pension Plan Assets

		Defined Benefit Pension Plans
		Level 1								Level 2								Level 3								Total
		2012				2011				2012				2011				2012				2011				2012				2011
U.S. government securities		$	-			$	-			$	89.8			$	70.1			$	-			$	-			$	89.8			$	70.1
Collective trust – money market funds			-				-				16.5				21.4				-				-				16.5				21.4
Collective trust – bond funds			-				-				47.7				41.5				-				-				47.7				41.5
Collective trust – equity funds			-				-				397.4				362.9				-				-				397.4				362.9
Preferred equity			-				0.3				-				-				-				-				-				0.3
Corporate debt			-				-				211.1				218.1				0.6				0.9				211.7				219.0
Municipal bonds			-				-				7.8				7.2				-				-				7.8				7.2
Mortgage and asset backed securities			-				-				0.2				0.8				-				-				0.2				0.8
Fair value of investments by hierarchy level		$	-			$	0.3			$	770.5			$	722.0			$	0.6			$	0.9			$	771.1			$	723.2
Accrued interest receivable																											3.8				4.2
Unsettled transactions payable																											(0.1	)			0.4
Plan assets																										$	774.8			$	727.8

Schedule of Fair Value of Postretirement Benefit Plan Assets

		Postretirement Health and Life Benefit Plans
		Level 1								Level 2								Level 3								Total
		2012				2011				2012				2011				2012				2011				2012				2011
Money market funds		$	0.8			$	1.2			$	-			$	-			$	-			$	-			$	0.8			$	1.2
Bond mutual funds			13.7				14.4				-				-				-				-				13.7				14.4
Equity mutual funds			27.1				29.5				-				-				-				-				27.1				29.5
Fair value of investments by hierarchy level		$	41.6			$	45.1			$	-			$	-			$	-			$	-			$	41.6			$	45.1

Reconciliation of Fair Value of Assets Using Unobservable Inputs

		Corporate Debt
Beginning balance		$	0.9
Transfer out to Level 2			(0.9	)
Transfer in from Level 2			0.1
New purchases			0.5
Ending balance		$	0.6

Schedule of Estimated Future Benefit Payments

		Defined Benefit Pension Plans				Postretirement Health and Life Benefit Plans				Expected Subsidies From Medicare
2013		$	60.9			$	15.3			$	0.7
2014			59.9				16.3				0.9
2015			71.3				18.4				1.1
2016			60.4				21.0				1.3
2017			60.8				22.7				1.5
2018 to 2022			311.3				112.8				10.3

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