Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2011

Schedule of Allocation of Plan Assets [Table Text Block]

The tables below present information about the retirement plan’s major asset categories measured at fair value on a recurring basis by the three levels described above as of December 31, 2011 and 2010 (in millions):



Asset Category	December 31, 2011		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and cash equivalents (a)	$	16	$	—	$	16	$	—
Equities (b):
U.S. equity funds (domestic)	23		12		11		—
International equity funds (non-U.S.)	25		—		25		—
Global equity funds (domestic and non-U.S.)	42		—		42		—
Fixed income long duration bonds (c)	174		—		174		—
Other (d):
Real return funds	31		31		—		—
Absolute return funds	32		32		—		—
Total	$	343	$	75	$	268	$	—



Asset Category	December 31, 2010		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and cash equivalents (a)	$	18	$	—	$	18	$	—
Equities (b):
U.S. equity funds (domestic) (e)	94		52		42		—
International equity funds (non-U.S.)	39		—		39		—
Fixed income long duration bonds (c)	128		—		128		—
Other (d):
Real return funds	15		15		—		—
Absolute return funds	—		—		—		—
Total	$	294	$	67	$	227	$	—

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(a)	Cash and cash equivalents consist of cash on hand and a short-term investment fund. The short-term investment fund provides for safety of principal and daily liquidity and is valued using the net asset value (NAV) per share. These assets are classified as Level 2 investments.


(b)	Equities consist of mutual funds and commingled investment funds that invest in equity securities. Commingled fund values reflect the net asset value per share, derived from the quoted prices in active markets of the underlying securities. Mutual funds are classified as Level 1 investments; commingled funds are classified as Level 2 investments.

(c)

Fixed income assets represent securities primarily invested in corporate, government related, mortgage and asset backed securities with a focus on long duration issues. Individual fixed income securities are generally priced on the basis of evaluated prices from independent pricing services. Such prices are monitored and provided by an independent, third-party custodial firm responsible for safekeeping plan assets. All fixed income securities are classified as Level 2 investments.


(d)	Other assets consist of investments in mutual funds that invest in a broad set of asset classes designed to provide the potential for real returns in excess of U.S. inflation or a target return regardless of market conditions. These assets are categorized as Level 1 investments.


(e)	We have presented prior year U.S. large cap and U.S. small/mid cap asset categories in U.S. equity funds (domestic) asset category in order to conform to current year presentation.

Schedule of Net Funded Status [Table Text Block]

Changes in our projected benefit obligations and plan assets, and the funded status for our pension plans and other postretirement benefits as of December 31, 2011 and 2010, were (in millions):



	Pension Benefits						Other Postretirement Benefits
	2011			2010			2011			2010
Change in projected benefit obligation:
Projected benefit obligations at beginning of year	$	564		$	511		$	96		$	356
Service cost	27			39			5			11
Interest cost	30			27			4			14
Actuarial loss	47			45			5			85
Benefits paid	(38		)	(62		)	(7		)	(6		)
Plan amendments	—			—			(3		)	(317		)
Curtailments	—			4			—			(47		)
Projected benefit obligation at end of year	630			564			100			96

Changes in plan assets:
Fair value of plan assets at beginning of year	294			262			—			—
Actual return on plan assets	28			30			—			—
Employer contributions	59			64			7			6
Benefits paid	(38		)	(62		)	(7		)	(6		)
Fair value of plan assets at end of year	343			294			—			—
Funded status at end of year	$	(287	)	$	(270	)	$	(100	)	$	(96	)

Schedule of Amounts Recognized in Balance Sheet [Table Text Block]

Liability amounts recognized in our consolidated balance sheet related to our defined benefit pension plans and other postretirement benefits as of December 31, 2011 and 2010, consisted of (in millions):



	Pension Benefits				Other Postretirement Benefits
	2011		2010		2011		2010
Accrued liabilities	$	2	$	8	$	10	$	8
Other noncurrent liabilities	285		262		90		88
Total amount recognized	$	287	$	270	$	100	$	96

Schedule of Net Benefit Costs [Table Text Block]

The components of pension and postretirement net periodic benefit expense (income) included in the consolidated statements of operations for the years ended December 31, 2011, 2010 and 2009, were (in millions):



	Pension Benefits									Other Postretirement Benefits
	2011			2010			2009			2011			2010			2009
Components of net periodic benefit expense (income):
Service cost	$	27		$	39		$	36		$	5		$	11		$	16
Interest cost	30			27			27			4			14			20
Expected return on plan assets	(21		)	(22		)	(21		)	—			—			—
Amortization of prior service cost (credit)	1			3			4			(37		)	(18		)	1
Recognized net actuarial loss	20			14			15			12			7			1
Recognized curtailment loss (gain)	4			4			—			—			(48		)	—
Net Periodic Benefit Expense (Income)	$	61		$	65		$	61		$	(16	)	$	(34	)	$	38

Schedule of Amounts in Accumulated Other Comprehensive Income Before Tax [Table Text Block]

Amounts recognized in accumulated other comprehensive loss before income taxes as of December 31, 2011 and 2010, consisted of (in millions):



	Pension Benefits				Other Postretirement Benefits						Total
	2011		2010		2011			2010			2011			2010
Net loss	$	264	$	247	$	114		$	122		$	378		$	369
Prior service cost (credit)	4		7		(259		)	(294		)	(255		)	(287		)
Total	$	268	$	254	$	(145	)	$	(172	)	$	123		$	82

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

The following table summarizes amounts recognized in other comprehensive income (loss) before income taxes for the years ended December 31, 2011, 2010 and 2009 (in millions):



	Pension Benefits									Other Postretirement Benefits
	2011			2010			2009			2011			2010			2009
Net gain (loss) arising during the year:
Net actuarial gain (loss)	$	(39	)	$	(41	)	$	(17	)	$	(4	)	$	(39	)	$	29
Prior service credit	—			—			—			2			317			—
Net gain reclassified into income:
Net actuarial loss (gain)	22			15			15			12			(42		)	1
Prior service cost (credit)	3			5			4			(37		)	(17		)	1
Total recognized in other comprehensive income (loss)	$	(14	)	$	(21	)	$	2		$	(27	)	$	219		$	31

Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]

Amounts included in accumulated other comprehensive loss before income taxes as of December 31, 2011, that are expected to be recognized as components of net periodic benefit expense in 2012 are as follows (in millions):



	Pension Benefits		Other Postretirement Benefits			Total
Net loss	$	22	$	11		$	33
Prior service cost (credit)	1		(38		)	(37		)
Total	$	23	$	(27	)	$	(4	)

Schedule of Assumptions Used [Table Text Block]

The following weighted-average assumptions were used to determine benefit obligations and net periodic benefit expenses for the years ended December 31, 2011, 2010 and 2009:



	Pension Benefits						Other Postretirement Benefits
	2011		2010		2009		2011		2010		2009
Projected benefit obligation:
Discount rate (a)	4.86	%	5.55	%	5.80	%	3.76	%	4.38	%	6.36	%
Rate of compensation increase	4.50	%	4.50	%	4.57	%	—		—		—
Net periodic benefit expense:
Discount rate (a)(b)	5.55	%	5.80	%	6.28	%	4.38	%	5.50	%	6.14	%
Rate of compensation increase	4.50	%	4.57	%	4.59	%	—		—		—
Expected long-term return on plan assets (c)	7.25	%	7.50	%	8.50	%	—		—		—

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(a)	We determine the discount rate primarily by reference to the effective yields on high quality corporate bonds that have a comparable cash flow pattern to the expected payments to be made under our plans.


(b)	As a result of the changes to other postretirement benefits during the second quarter of 2010, we remeasured our postretirement obligation as of June 30, 2010. The discount rate used to determine the net periodic benefit expense was 6.36% for the six months ended June 30, 2010, and 4.64% for the six months ended December 31, 2010.


(c)	The expected return on plan assets reflects the weighted-average of the expected long-term rates of return for the broad categories of investments held in the plans. The expected long-term rate of return is adjusted when there are fundamental changes in expected returns on the plan’s investments.

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

The assumed health care cost trend rates used to determine the projected postretirement benefit obligation are as follows:



	2011		2010
Health care cost trend rate assumed for next year	8.00	%	8.50	%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	4.80	%	4.50	%
Year that the rate reaches the ultimate trend rate	2024		2018

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

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



	1-Percentage-Point Increase		1-Percentage-Point Decrease
Effect on total of service and interest cost components	$	0.2	$	(0.2	)
Effect on postretirement benefit obligation	1		(1		)

Schedule of Expected Benefit Payments [Table Text Block]

The following estimated future benefit payments, which reflect expected future service, as appropriate, are expected to be paid for our defined benefit pension plans and other postretirement benefits in the years indicated (in millions):



	Pension Benefits		Other Postretirement Benefits
2012	$	49	$	10
2013	48		12
2014	51		10
2015	56		10
2016	58		11
2017-2021	321		53