Pension and Postretirement Health and Life Benefits (Tables)

12 Months Ended

Dec. 31, 2014

General Discussion of Pension and Other Postretirement Benefits [Abstract]

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

Changes in the projected benefit obligations and plan assets and the funded status of the plans follow (in millions):



	Defined Benefit Pension Plans									Postretirement Health and Life Benefit Plans
	Successor			Predecessor						Successor			Predecessor
	Three Months Ended December 31, 2014			Nine Months Ended September 30, 2014			Year Ended December 31, 2013			Three Months Ended December 31, 2014			Nine Months Ended September 30, 2014			Year Ended December 31, 2013
Changes in Benefit Obligations:
Obligations at beginning of period	$	965.1		$	907.4		$	1,099.0		$	240.4		$	231.9		$	248.8
Actuarial (gains) losses, net	18.7			96.0			(121.0		)	4.3			8.3			(25.2		)
Service costs	2.0			1.8			9.9			0.2			1.3			3.6
Interest costs	10.2			31.7			45.0			2.3			7.5			9.0
Benefits paid	(15.0		)	(44.3		)	(58.2		)	(2.8		)	(8.7		)	(12.2		)
Lump sum benefits paid	(17.9		)	(24.7		)	(47.2		)	—			—			—
Less federal subsidy on benefits paid	—			—			—			0.1			0.1			0.5
Administrative expenses paid	(1.7		)	N/A			N/A			N/A			N/A			N/A
Plan amendments	—			—			—			(6.8		)	—			(27.8		)
Curtailments	—			(2.8		)	(20.1		)	—			—			24.6
Special termination benefits	—			—			—			—			—			10.6
Obligations at end of period	961.4			965.1			907.4			237.7			240.4			231.9
Changes in Plan Assets:
Fair value of plan assets at beginning of period	781.5			784.0			774.8			28.7			36.9			41.6
Actual return on plan assets	25.5			46.2			92.7			0.7			0.5			6.9
Company contributions	—			20.3			21.9			(0.3		)	—			0.6
Benefits paid	(15.0		)	(44.3		)	(58.2		)	(2.8		)	(8.7		)	(12.2		)
Lump sum benefits paid	(17.9		)	(24.7		)	(47.2		)	—			—			—
Administrative expenses paid	(1.7		)	N/A			N/A			N/A			N/A			N/A
Fair value of plan assets at end of period	772.4			781.5			784.0			26.3			28.7			36.9
(Unfunded) status at end of period	(189.0		)	(183.6		)	(123.4		)	(211.4		)	(211.7		)	(195.0		)

Amounts recognized in assets and liabilities:
Current liabilities	$	(9.7	)	$	(9.5	)	$	(2.2	)	—			—			—
Noncurrent liabilities	(179.3		)	(174.1		)	(121.2		)	(211.4		)	(211.7		)	(195.0		)
	$	(189.0	)	$	(183.6	)	$	(123.4	)	$	(211.4	)	$	(211.7	)	$	(195.0	)
Amounts recognized in accumulated other comprehensive income (loss), pre-tax:
Net actuarial loss	$	—		$	202.4		$	115.3		$	—		$	22.0		$	12.8
Prior service cost (credit)	—			—			0.2			(6.8		)	(1.8		)	(2.1		)
	$	—		$	202.4		$	115.5		$	(6.8	)	$	20.2		$	10.7



Assumptions used to determine benefit obligations at end of period:
Discount rate	4.1%	4.3%	4.9%	3.8%	4.0%	4.5%
Compensation increases	n/a	n/a	2.0%	2.0%	2.0%	2.0%

Schedule of Net Benefit Costs



	Defined Benefit Pension Plans									Postretirement Health and Life Benefit Plans
	Successor			Predecessor						Successor			Predecessor
	Three Mos. Ended Dec. 31, 2014			Nine Mos. Ended Sep. 30, 2014			Year Ended Dec. 31, 2013			Three Mos. Ended Dec. 31, 2014			Nine Mos. Ended Sep. 30, 2014			Year Ended Dec. 31, 2013
Net Periodic Benefit Costs
Service costs	$	2.0		$	1.8		$	9.9		$	0.2		$	1.3		$	3.6
Interest costs	10.2			31.7			45.0			2.3			7.5			9.0
Expected return on plan assets (gains)	(13.1		)	(38.5		)	(51.1		)	(0.4		)	(1.5		)	(2.3		)
Amortization of prior service costs (credits), net				—			0.7			—			(0.3		)	—
Amortization of actuarial (gains) losses, net	6.4			1.0			16.2			4.0						2.7
Curtailment loss (gain)	—			(2.2		)	12.6			—			—			(1.0		)
Special termination loss	—			—			—			—			—			10.6
Net periodic benefit costs	$	5.5		$	(6.2	)	$	33.3		$	6.1		$	7.0		$	22.6

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	$	6.4		$	85.4		$	(182.7	)	$	4.0		$	9.2	$	(5.1	)
Net prior service cost (credit)	—			—			—			(6.8		)	—		(27.8		)
Amortization of actuarial gains (losses), net	(6.4		)	1.5			(28.0		)	(4.0		)	—		(27.3		)
Amortization of prior service (costs) credits	—			(0.2		)	(1.5		)	—			0.3		25.6
Total (gain) loss recognized in other comprehensive income (loss), pre-tax	$	—		$	86.7		$	(212.2	)	$	(6.8	)	$	9.5	$	(34.6	)
Total recognized in net periodic benefit costs (income) and other comprehensive income (loss), pre-tax	$	5.5		$	80.5		$	(178.9	)	$	(0.7	)	$	16.5	$	12.0

Schedule of Assumptions Used [Table Text Block]



	Defined Benefit Pension Plans			Postretirement Health and Life Benefit Plans
	Successor	Predecessor		Successor	Predecessor
	Three Mos. Ended Dec. 31, 2014	Nine Mos. Ended Sep. 30, 2014	Year Ended Dec. 31, 2013	Three Mos. Ended Dec. 31, 2014	Nine Mos. Ended Sep. 30, 2014	Year Ended Dec. 31, 2013
Assumptions used to determine net periodic benefit costs:
Discount rate	4.1%	4.3%	4.9%	4.0%	4.0%	4.5%
Expected return on plan assets	7.0%	6.8%	6.8%	5.8%	6.8%	6.8%
Compensation increases	n/a	n/a	4.0%	2.0%	2.0%	4.0%

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



	Successor	Predecessor
	December 31, 2014	September 30, 2014	December 31, 2013
Healthcare cost trend rate for the following year	8%	7.5%	7.5%
Long-term rate that the healthcare cost trend rate gradually declines to	5%	5%	5%
Year that the healthcare cost trend rate is expected to reach the long-term rate	2021	2019	2019

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	$	5.9	$	(5.5	)
Net periodic benefit costs (service and interest cost components only)	$	0.1	$	(0.1	)

Schedule of Allocation of Plan Assets [Table Text Block]

The allocation of plan assets between equity and debt securities and the target allocation range by asset category follows:



	December 31,
	2014		2013		2015 Target
Defined Benefit Pension Plans:
Equity securities	48	%	54	%	40	-	60%
Debt securities	52		46		40	-	60
	100	%	100	%
Postretirement Health and Life Benefit Plans:
Equity securities	65	%	69	%	55	-	75%
Debt securities	35		31		25	-	45
	100	%	100	%

Plan assets are measured at fair value. Following are the plan investments as of December 31, 2014 and December 31, 2013 categorized by the fair value hierarchy levels described in Note 14, Fair Value Measurements, (in millions):



	Defined Benefit Pension Plans
	Level 1				Level 2				Level 3				Total
	2014		2013		2014		2013		2014		2013		2014		2013
U.S. government securities	$	—	$	—	$	81.5	$	74.2	$	—	$	—	$	81.5	$	74.2
Collective trust - money market funds	—		—		10.6		19.4		—		—		10.6		19.4
Collective trust - bond funds	—		—		51.8		48.1		—		—		51.8		48.1
Collective trust - equity funds	—		—		366.7		423.1		—		—		366.7		423.1
Corporate debt	—		—		249.6		208.5		—		—		249.6		208.5
Municipal bonds	—		—		8.1		7.0		—		—		8.1		7.0
Fair value of investments by hierarchy level	$	—	$	—	$	768.3	$	780.3	$	—	$	—	$	768.3	$	780.3
Accrued interest receivable													4.0		4.0
Unsettled transactions													0.1		(0.3		)
Plan assets													$	772.4	$	784.0



	Postretirement Health and Life Benefit Plans
	Level 1				Level 2				Level 3				Total
	2014		2013		2014		2013		2014		2013		2014		2013
Money market funds	$	—	$	—	$	0.8	$	0.9	$	—	$	—	$	0.8	$	0.9
Bond mutual funds	8.5		10.4		—		—		—		—		8.5		10.4
Equity mutual funds	17.0		25.6		—		—		—		—		17.0		25.6
Fair value of investments by hierarchy level	$	25.5	$	36.0	$	0.8	$	0.9	$	—	$	—	$	26.3	$	36.9

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]



	Year Ended December 31, 2013
Beginning balance	$	0.6
Transfer out to Level 2	(0.6		)
Transfer in from Level 2	—
New purchases	—
Ending balance	$	—

Schedule of Expected Benefit Payments [Table Text Block]



	Defined Benefit Pension Plans		Postretirement Health and Life Benefit Plans
2015	$	92.9	$	18.6
2016	58.6		22.1
2017	56.9		23.9
2018	56.0		23.0
2019	53.4		21.7
2020 to 2024	253.6		84.0