Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2012

Employee Benefits

Schedule of estimated future benefit payments

	Pension Plan		Non-Qualified Pension Plan		Post-Retirement Benefit Plans		Medicare Part D Subsidy Receipts
	(Dollars in millions)
Estimated future benefit payments:
2013	$	753		2		335		(25	)
2014		701		2		329		(26	)
2015		684		2		321		(28	)
2016		666		2		311		(29	)
2017		648		2		300		(31	)
2018 - 2022		2,946		7		1,318		(173	)

Schedule of actuarial assumptions used to compute net periodic benefit expense

	Pension Plan						Non-Qualified Pension Plan						Post-Retirement Benefit Plans
	Successor(1)				Predecessor		Successor(1)				Predecessor		Successor(1)				Predecessor
	2012		2011		2010		2012		2011		2010		2012		2011		2010
Actuarial assumptions at beginning of year:
Discount rate		4.70%		5.40%		5.80%		4.40%		5.00%		5.50%		4.60%		5.30%		5.70%
Rate of compensation increase		3.25%		3.50%		3.50%		N/A		N/A		3.50%		N/A		N/A		N/A
Expected long-term rate of return on plan assets		7.50%		7.50%		8.00%		N/A		N/A		N/A		7.50%		7.50%		8.00%
Initial health care cost trend rate		N/A		N/A		N/A		N/A		N/A		N/A		7.25% / 8.00%		7.50%		8.00%
Ultimate health care cost trend rate		N/A		N/A		N/A		N/A		N/A		N/A		5.00%		5.00%		5.00%
Year ultimate trend rate is reached		N/A		N/A		N/A		N/A		N/A		N/A		2018		2016		2016

N/A—Not applicable

(1)

The actuarial assumptions as of the predecessor date of January 1, 2011 remain unchanged as of the successor date of April 1, 2011 with the exception of the discount rate. The discount rate assumption was 5.30% for Pension, 4.90% for Non-Qualified Pension and 5.20% for Post-Retirement as of the predecessor date January 1, 2011.

Schedule of actuarial assumptions used to compute the funded status for the plans

	December 31,
	Pension Plan		Non-Qualified Pension Plan		Post-Retirement Benefit Plans
	Successor		Successor		Successor
	2012	2011	2012	2011	2012		2011
Actuarial assumptions at end of year:
Discount rate	3.70%	4.70%	3.50%	4.40%		3.60%		4.60%
Rate of compensation increase	3.25%	3.25%	N/A	N/A		N/A		N/A
Initial health care cost trend rate	N/A	N/A	N/A	N/A		6.75% / 7.50%		7.25% / 8.00%
Ultimate health care cost trend rate	N/A	N/A	N/A	N/A		4.50%		5.00%
Year ultimate trend rate is reached	N/A	N/A	N/A	N/A		2022 / 2024		2018

N/A—Not applicable

Schedule of the change in the fair value of plan assets

	Pension Plan Assets			Post-Retirement Benefit Plan Assets
	(Dollars in millions)
Fair value of plan assets January 1, 2010 (Predecessor)	$	7,326			863
Actual gain on plan assets		1,094			124
Benefits paid from plan assets		(760	)		(186	)
Fair value of plan assets December 31, 2010 (Predecessor)		7,660			801
Actual gain on plan assets		133			13
Benefits paid from plan assets		(152	)		(47	)
Fair value of plan assets March 31, 2011 (Predecessor)		7,641			767
Fair value of plan assets April 1, 2011 (Successor)		7,777			762
Actual gain on plan assets		449			11
Contribution to qualified trust		307			—
Benefits paid from plan assets		(489	)		(130	)
Fair value of plan assets December 31, 2011 (Successor)		8,044			643
Actual gain on plan assets		1,006			73
Benefits paid from plan assets		(720	)		(144	)
Fair value of plan assets December 31, 2012 (Successor)	$	8,330			572

Schedule of gross notional exposure of the derivative instruments directly held by the plans

	Gross Notional Exposure
	Pension Plan				Post-Retirement Benefit Plan
	Successor				Successor
	December 31, 2012		December 31, 2011		December 31, 2012		December 31, 2011
	(Dollars in millions)
Derivative instruments:
Exchange-traded U.S. equity futures	$	204		535		—		12
Exchange-traded non-U.S. equity futures		1		4		—		—
Exchange-traded treasury futures		1,190		1,512		30		19
Interest rate swaps		993		435		—		—
Total return swaps		—		110		—		51
Foreign exchange forwards		490		379		21		23
Credit default swaps		334		—		—		—
Options		519		—		—		—

Schedule of the unfunded status of the benefit plans

	Pension Plan						Non-Qualified Pension Plan						Post-Retirement Benefit Plans
	Successor						Successor						Successor
	Year Ended December 31, 2012			Year Ended December 31, 2011			Year Ended December 31, 2012			Year Ended December 31, 2011			Year Ended December 31, 2012			Year Ended December 31, 2011
	(Dollars in millions)
Benefit obligation	$	(9,278	)		(8,671	)		(22	)		(23	)		(3,438	)		(3,349	)
Fair value of plan assets		8,330			8,044			—			—			572			643
Unfunded status	$	(948	)		(627	)		(22	)		(23	)		(2,866	)		(2,706	)
Current portion of unfunded status	$	—			—			(3	)		(4	)		(134	)		(155	)
Non-current portion of unfunded status		(948	)		(627	)		(19	)		(19	)		(2,732	)		(2,551	)

Schedule of items not recognized as a component of net periodic benefits expense have been recorded on Company's consolidated balance sheets in accumulated other comprehensive loss

	Predecessor
	Year Ended December 31, 2010			Recognition of Net Periodic Benefits Expense			Deferrals		Net Change in AOCI			Three Months Ended March 31, 2011
	(Dollars in millions)
Accumulated other comprehensive (loss) income:
Pension plan:
Net actuarial (loss) gain	$	(1,695	)		30			—		30			(1,665	)
Prior service benefit (cost)		163			(5	)		—		(5	)		158
Deferred income tax benefit (expense)		676			(7	)		—		(7	)		669
Total pension plan		(856	)		18			—		18			(838	)
Non-qualified pension plan:
Net actuarial (loss) gain		(8	)		—			—		—			(8	)
Deferred income tax benefit (expense)		1			(1	)		—		(1	)		—
Total non-qualified pension plan		(7	)		(1	)		—		(1	)		(8	)
Post-retirement benefit plans:
Net actuarial (loss) gain		(544	)		10			—		10			(534	)
Prior service benefit (cost)		890			(26	)		—		(26	)		864
Deferred income tax benefit (expense)		158			6			—		6			164
Total post-retirement benefit plans		504			(10	)		—		(10	)		494
Total accumulated other comprehensive (loss) income	$	(359	)		7			—		7			(352	)

	Successor
	April 1, 2011		Recognition of Net Periodic Benefits Expense		Deferrals			Net Change in AOCI			Nine Months Ended December 31, 2011
	(Dollars in millions)
Accumulated other comprehensive (loss) income:
Pension plan:
Net actuarial loss	$	—		—		(533	)		(533	)		(533	)
Deferred income tax benefit		—		—		205			205			205
Total pension plan		—		—		(328	)		(328	)		(328	)
Non-qualified pension plan:
Net actuarial gain (loss)		—		1		(3	)		(2	)		(2	)
Deferred income tax benefit		—		—		1			1			1
Total non-qualified pension plan		—		1		(2	)		(1	)		(1	)
Post-retirement benefit plans:
Net actuarial loss		—		—		(163	)		(163	)		(163	)
Prior service cost		—		—		(27	)		(27	)		(27	)
Deferred income tax benefit		—		—		73			73			73
Total post-retirement benefit plans		—		—		(117	)		(117	)		(117	)
Total accumulated other comprehensive (loss) income	$	—		1		(447	)		(446	)		(446	)

	Successor
	Nine Months Ended December 31, 2011			Recognition of Net Periodic Benefits Expense		Deferrals			Net Change in AOCI			Year Ended December 31, 2012
	(Dollars in millions)
Accumulated other comprehensive (loss) income:
Pension plan:
Net actuarial loss	$	(533	)		—		(452	)		(452	)		(985	)
Deferred income tax benefit		205			—		174			174			379
Total pension plan		(328	)		—		(278	)		(278	)		(606	)
Non-qualified pension plan:
Net actuarial loss		(2	)		—		(1	)		(1	)		(3	)
Deferred income tax benefit		1			—		—			—			1
Total non-qualified pension plan		(1	)		—		(1	)		(1	)		(2	)
Post-retirement benefit plans:
Net actuarial loss		(163	)		—		(153	)		(153	)		(316	)
Prior service (cost) benefit		(27	)		1		—			1			(26	)
Deferred income tax benefit		73			—		59			59			132
Total post-retirement benefit plans		(117	)		1		(94	)		(93	)		(210	)
Total accumulated other comprehensive (loss) income	$	(446	)		1		(373	)		(372	)		(818	)

Schedule of estimated items to be recognized in 2013 as a component of net periodic benefit expense of the benefit plans

	Pension Plan			Non-Qualified Pension Plan		Post-Retirement Benefit Plans
	(Dollars in millions)
Estimated recognition of net periodic benefit expense in 2013:
Net actuarial loss	$	(7	)		—		(3	)
Prior service cost		—			—		(1	)
Deferred income tax benefit		3			—		2
Estimated net periodic benefit expense to be recorded in 2013 as a component of other comprehensive income (loss)	$	(4	)		—		(2	)

Pension Plan

Employee Benefits

Schedule of components of net periodic expense (benefit) for employee benefit plans

	Pension Plan
	Successor						Predecessor
	Year Ended December 31, 2012			Nine Months Ended December 31, 2011			Three Months Ended March 31, 2011			Year Ended December 31, 2010
	(Dollars in millions)
Net periodic benefit expense (income):
Service cost	$	56			40			14			53
Interest cost		389			318			104			447
Expected return on plan assets		(576	)		(416	)		(133	)		(556	)
Recognized prior service cost		—			—			(6	)		(22	)
Recognized net actuarial loss		—			—			31			130
Total net periodic benefit (income) expense	$	(131	)		(58	)		10			52

Schedule of change in benefit obligation

	Pension Plan
	Successor						Predecessor
	Year Ended December 31, 2012			Nine Months Ended December 31, 2011			Three Months Ended March 31 2011
	(Dollars in millions)
Benefit obligations accrued at beginning of period:	$	8,671			8,237			8,245
Service cost		56			40			14
Interest cost		389			318			104
Actuarial loss		882			565			—
Benefits paid from plan assets		(720	)		(489	)		(152	)
Benefit obligations accrued at end of period	$	9,278			8,671			8,211
Accumulated benefit obligations	$	9,276			8,667			8,211

Schedule of fair value of the plans' assets by category and the input levels used to determine those fair values

The tables below presents the fair value of plan assets by category and the input levels used to determine those fair values as of the successor date of December 31, 2012. It is important to note that the asset allocations do not include market exposures that are gained with derivatives. The investment category amounts include pending trade receivables and pending trade payable for 2012.

	Fair Value of Pension Plan Assets
	Level 1			Level 2		Level 3		Total
	(Dollars in millions)
Investment grade bonds (a)	$	561			1,050		—		1,611
High yield bonds (b)		—			881		40		921
Emerging market bonds (c)		134			269		—		403
Convertible bonds (d)		—			253		—		253
Diversified strategies (e)		—			443		—		443
U.S. stocks (f)		828			81		—		909
Non-U.S. stocks (g)		819			120		—		939
Emerging market stocks (h)		78			131		—		209
Private equity (i)		—			—		480		480
Private debt (j)		—			—		314		314
Market neutral hedge funds (k)		—			612		—		612
Directional hedge funds (k)		—			230		131		361
Real estate (l)		—			150		228		378
Derivatives (m)		(3	)		2		—		(1	)
Cash equivalents and short-term investments (n)		—			507		—		507
Total investments	$	2,417			4,729		1,193		8,339
Accrued expenses									(9	)
Total pension plan assets								$	8,330

        The tables below present the fair value of plan assets by category and the input levels used to determine those fair values as of the successor date of December 31, 2011. The asset allocations do not include market exposures that are gained with derivatives.

	Fair Value of Pension Plan Assets
	Level 1		Level 2			Level 3		Total
	(Dollars in millions)
Investment grade bonds (a)	$	694		756			—		1450
High yield bonds (b)		—		530			78		608
Emerging market bonds (c)		—		189			—		189
Convertible bonds (d)		—		335			—		335
Diversified strategies (e)		—		489			—		489
U.S. stocks (f)		224		85			—		309
Non-U.S. stocks (g)		697		42			—		739
Emerging market stocks (h)		65		136			—		201
Private equity (i)		—		—			791		791
Private debt (j)		—		—			448		448
Market neutral hedge funds (k)		—		620			188		808
Directional hedge funds (k)		—		268			28		296
Real estate (l)		—		48			334		382
Derivatives (m)		12		(5	)		—		7
Cash equivalents and short-term investments (n)		13		1,118			—		1,131
Total investments	$	$1,705		4,611			1,867		8,183
Dividends and interest receivable									21
Pending trades receivable									388
Accrued expenses									(8	)
Pending trades payable									(540	)
Total pension plan assets								$	8,044

Summary of changes in fair value of defined benefit plans' Level 3 assets

	Pension Plan Assets Valued Using Level 3 Inputs
	High Yield Bonds			Private Equity			Private Debt			Market Neutral Hedge Fund			Directional Hedge Funds			Real Estate			Total
	(Dollars in millions)
Balance at December 31, 2010 (Predecessor)	$	114			831			530			102			29			288			1,894
Net transfers		—			—			—			—			—			—			—
Net (dispositions) acquisitions		(5	)		(20	)		(32	)		80			—			22			45
Actual return on plan assets:
Realized (losses) gains relating to assets sold during the period		(2	)		62			(1	)		—			—			4			63
Unrealized gains (losses) relating to assets still held at period-end		9			13			4			3			3			15			47
Balance at March 31, 2011 (Predecessor)		116			886			501			185			32			329			2,049
Balance at April 1, 2011 (Successor)		116			886			501			185			32			329			2,049
Net transfers		—			—			—			—			—			—			—
Net (dispositions) acquisitions		(21	)		(90	)		(60	)		—			(2	)		(1	)		(174	)
Actual return on plan assets:
Realized (losses) gains relating to assets sold during the period		(12	)		197			15			3			(1	)		9			211
Unrealized gains (losses) relating to assets still held at period-end		(5	)		(202	)		(8	)		—			(1	)		(3	)		(219	)
Balance at December 31, 2011 (Successor)		78			791			448			188			28			334			1,867
Transfer to Defined Benefit Master Trust at January 1, 2012 (Successor)		(78	)		(791	)		(448	)		(188	)		(28	)		(334	)		(1,867	)
QCII share of master trust at January 1, 2012 (Successor)		53			535			312			127			124			361			1,512
Net transfers		(8	)		—			—			(127	)		—			(71	)		(206	)
Net (dispositions) acquisitions		(6	)		(27	)		11			—			—			(69	)		(91	)
Actual return on plan assets:
Realized gains relating to assets sold during the year		—			2			1			—			—			—			3
Unrealized gains (losses) relating to assets still held at year-end		1			(30	)		(10	)		—			7			7			(25	)
Balance at December 31, 2012 (Successor)	$	40			480			314			—			131			228			1,193

Non-Qualified Pension Plan

Employee Benefits

Schedule of components of net periodic expense (benefit) for employee benefit plans

	Non-Qualified Pension Plan
	Successor				Predecessor
	Year Ended December 31, 2012		Nine Months Ended December 31, 2011		Three Months Ended March 31, 2011		Year Ended December 31, 2010
	(Dollars in millions)
Net periodic benefit expense (income):
Service cost	$	—		—		—		—
Interest cost		1		1		—		2
Curtailment and settlements		—		1		—		—
Total net periodic benefit expense (income)	$	1		2		—		2

Schedule of change in benefit obligation

	Non-Qualified Pension Plan
	Successor						Predecessor
	Year Ended December 31, 2012			Nine Months Ended December 31, 2011			Three Months Ended March 31, 2011
	(Dollars in millions)
Benefit obligations accrued at beginning of period:	$	23			31			31
Service cost		—			—			—
Interest cost		1			1			—
Actuarial loss		1			2			—
Benefits paid by company		(3	)		(11	)		—
Benefit obligations accrued at end of period	$	22			23			31
Accumulated benefit obligations	$	22			23			31

Post-Retirement Benefit Plan

Employee Benefits

Schedule of effects of a 100 basis point change in assumed health care cost rates

	100 Basis Points Change
	Increase		Decrease
	(Dollars in millions)
Effect on the aggregate of the service and interest cost components of net periodic post-retirement benefit expense (statements of operations)	$	3		(3	)
Effect on benefit obligation (balance sheets)		74		(66	)

Schedule of components of net periodic expense (benefit) for employee benefit plans

	Post-Retirement Benefit Plans
	Successor						Predecessor
	Year Ended December 31, 2012			Nine Months Ended December 31, 2011			Three Months Ended March 31, 2011			Year Ended December 31, 2010
	(Dollars in millions)
Net periodic benefit expense:
Service cost	$	9			5			2			7
Interest cost		147			124			41			183
Expected return on plan assets		(41	)		(38	)		(13	)		(61	)
Recognized prior service cost		1			—			(24	)		(99	)
Recognized net actuarial loss		—			—			10			40
Total net periodic benefit expense	$	116			91			16			70

Schedule of change in benefit obligation

	Post Retirement Benefits Plans
	Successor						Predecessor
	Year Ended December 31, 2012			Nine Months Ended December 31, 2011			Three Months Ended March 31, 2011
	(Dollars in millions)
Benefit obligations accrued at beginning of period:	$	3,348			3,284			3,323
Service cost		9			5			2
Interest cost		147			124			41
Actuarial loss		185			130			—
Plan amendments		—			27			—
Participant contributions		75			46			15
Benefits paid from plan assets		(144	)		(130	)		(47	)
Benefits paid by company		(201	)		(159	)		(46	)
Medicare Part D reimbursements		19			21			—
Benefit obligations accrued at end of period	$	3,438			3,348			3,288
Accumulated benefit obligations	$	3,438			3,348			3,288

Schedule of fair value of the plans' assets by category and the input levels used to determine those fair values

	Fair Value of Post-Retirement Plan Assets
	Level 1		Level 2		Level 3		Total
	(Dollars in millions)
Investment grade bonds (a)	$	—		85		—		85
High yield bonds (b)		—		89		—		89
Emerging market bonds (c)		—		40		—		40
Convertible bonds (d)		—		2		—		2
Diversified strategies (e)		—		71		—		71
U.S. stocks (f)		40		—		—		40
Non-U.S. stocks (g)		51		1		—		52
Emerging market stocks (h)		—		20		—		20
Private equity (i)		—		—		44		44
Private debt (j)		—		—		5		5
Market neutral hedge funds (k)		—		41		—		41
Directional hedge funds (k)		—		24		—		24
Real estate (l)		—		20		28		48
Cash equivalents and short-term investments (n)		2		20		—		22
Total investments	$	93		413		77		583
Accrued expenses								(1	)
Reimbursement accrual								(10	)
Total post-retirement plan assets							$	572

	Fair Value of Post-Retirement Plan Assets
	Level 1		Level 2		Level 3		Total
	(Dollars in millions)
Investment grade bonds (a)	$	12		95		—		107
High yield bonds (b)		—		61		—		61
Emerging market bonds (c)		—		33		—		33
Convertible bonds (d)		—		30		—		30
Diversified strategies (e)		—		62		—		62
U.S. stocks (f)		64		—		—		64
Non-U.S. stocks (g)		58		2		—		60
Emerging market stocks (h)		—		17		—		17
Private equity (i)		—		—		60		60
Private debt (j)		—		—		8		8
Market neutral hedge funds (k)		—		67		—		67
Directional hedge funds (k)		—		20		—		20
Real estate (l)		—		19		26		45
Cash equivalents and short-term investments (n)		1		20		—		21
Total investments	$	135		426		94		655
Dividends and interest receivable								3
Pending trades receivable								23
Accrued expenses								(15	)
Pending trades payable								(23	)
Total post-retirement plan assets							$	643

Summary of changes in fair value of defined benefit plans' Level 3 assets

	Post-Retirement Benefit Plan Assets Valued Using Level 3 Inputs
	Private Equity			Private Debt			Real Estate			Total
	(Dollars in millions)
Balance at December 31, 2010 (Predecessor)	$	77			11			25			113
Net dispositions		(3	)		—			(1	)		(4	)
Actual return on plan assets:
Realized gains (losses) relating to assets sold during the period		8			—			1			9
Unrealized losses relating to assets still held at period-end		(6	)		(1	)		(1	)		(8	)
Balance at March 31, 2011 (Predecessor)		76			10			24			110
Balance at April 1, 2011 (Successor)		76			10			24			110
Net dispositions		(21	)		(2	)		—			(23	)
Actual return on plan assets:
Realized gains (losses) relating to assets sold during the period		33			1			—			34
Unrealized losses relating to assets still held at period-end		(28	)		(1	)		2			(27	)
Balance at December 31, 2011 (Successor)		60			8			26			94
Net dispositions		(14	)		(3	)		(1	)		(18	)
Actual return on plan assets:
Realized gains (losses) relating to assets sold during the year		4			2			(1	)		5
Unrealized losses relating to assets still held at year-end		(6	)		(2	)		4			(4	)
Balance at December 31, 2012 (Successor)	$	44			5			28			77