Benefits (Tables)

12 Months Ended

Dec. 31, 2012

Postemployment Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

The following tables contain information at the dates indicated about the obligations and funded status of the Company’s other postretirement plans.

	Successor			Predecessor
	December 31, 2012			March 25, 2012		December 31, 2011
Change in benefit obligation:
Benefit obligation at beginning of period	$	93		$	88	$	69
Service cost	—			1		3
Interest cost	1			1		4
Amendments	16			—		—
Actuarial loss and other	4			3		13
Benefits paid, net	(1		)	—		(1		)
Curtailments	(75		)	—		—
Benefit obligation at end of period	$	38		$	93	$	88
Change in plan assets:
Fair value of plan assets at beginning of period	$	82		$	75	$	68
Return on plan assets and other	3			5		—
Employer contributions	6			2		8
Benefits paid, net	(1		)	—		(1		)
Fair value of plan assets at end of period	$	90		$	82	$	75
Amount (overfunded) underfunded at end of period (1)	$	(52	)	$	11	$	13
Amounts recognized in accumulated other comprehensive income (pre-tax basis) consist of:
Net actuarial loss	$	(1	)	$	—	$	23
Prior service cost	16			—		1
	$	15		$	—	$	24

⁽¹⁾  Underfunded balance is recognized as a non-current liability in the consolidated balance sheets. Overfunded balance is recognized as a non-current asset in the consolidated balance sheets.

Schedule of Net Benefit Costs [Table Text Block]

The following tables set forth the components of net periodic benefit cost of the Company’s postretirement benefit plan for the periods presented:

	Successor			Predecessor
	Period from Acquisition (March 26, 2012) to December 31, 2012			Period from January 1, 2012 to March 25, 2012			Years Ended December 31,
							2011			2010
Service cost	$	—		$	1		$	2		$	3
Interest cost	1			1			4			4
Expected return on plan assets	(3		)	(1		)	(3		)	(3		)
Prior service credit amortization	—			(1		)	(2		)	(2		)
Curtailment recognition (1)	(11		)	—			—			—
Net periodic benefit cost	$	(13	)	$	—		$	1		$	2

⁽¹⁾  Subsequent to the Merger, the Company amended certain of its other postretirement employee benefit plans to prospectively restrict participation in the plans for certain active employees.  The plan amendments resulted in the plans becoming currently over-funded and, accordingly, the Company recorded a gross pre-tax curtailment gain of $70 million, $59 million of which is subject to refund to customers; thus, the net curtailment gain recognition was $11 million.

Schedule of Assumptions Used [Table Text Block]

The weighted-average assumptions used in determining net periodic benefit cost for the periods presented are shown in the table below:

	Successor		Predecessor
	Period from Acquisition (March 26, 2012) to December 31, 2012		Period from January 1, 2012 to March 25, 2012		Years Ended December 31,
					2011		2010
Discount rate	3.64	%	4.26	%	5.54	%	6.00	%
Expected return on assets:
Tax exempt accounts	7.00	%	7.00	%	7.00	%	7.00	%
Taxable accounts	4.50	%	4.50	%	4.50	%	5.00	%

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

The assumed health care cost trend rates used to measure the expected cost of benefits covered by the plans are shown in the table below:

	Successor		Predecessor
	December 31, 2012		March 25, 2012		December 31, 2011
Health care cost trend rate assumed for next year	8.50	%	8.00	%	8.50	%
Rate to which the cost trend is assumed to decline (the ultimate trend rate)	4.50	%	4.75	%	4.75	%
Year that the rate reaches the ultimate trend rate	2020		2019		2019

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

Assumed health care cost trend rates have a significant effect on the amounts reported for health care plans.  A one-percentage-point change in assumed health care cost trend rates would have the following effects:

	One Percentage Point Increase		One Percentage Point Decrease
Effect on accumulated postretirement benefit obligation	$	4	$	(3	)

Schedule of Allocation of Plan Assets [Table Text Block]

The fair value of the Company’s other postretirement plan assets at the dates indicated by asset category is as follows:

	Successor		Predecessor
	December 31, 2012		December 31, 2011
Cash and cash equivalents	$	2	$	2
Mutual fund (1)	88		73
Total	$	90	$	75

Schedule of Expected Benefit Payments [Table Text Block]

Benefit Payments.  The Company’s estimate of expected benefit payments, which reflect expected future service, as appropriate, in each of the next five years and in the aggregate for the five years thereafter are shown in the table below:

Years	Expected Benefits Before Effect of Medicare Part D		Payments Medicare Part D Subsidy Receipts		Net
2013	$	3	$	—	$	3
2014	3		—		3
2015	3		—		3
2016	3		—		3
2017	3		—		3
2018 – 2022	12		2		10