Aggregate increase or decrease in the number of shares earned for all participants based on the performance.

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Common stock share price on grant date.

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Estimated dividends to be paid.

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Liability for common stock.

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Maximum level for the determination of performance goals and measures.

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Payment due to exercise of common stock.

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Percentage targeted number of common stock shares net of forfeiture related to volume goal.

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Restricted stock shares and restricted stock units included in SLO Award target.

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Share-based compensation stock award premium.

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Shares to be issued as a percentage of target shares under the performance incentive plan.

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Targeted number of common stock shares to be earned for net debt reduction goals.

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Targeted number of common stock shares to be earned under the performance incentive plan.

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Targeted number of common stock shares to be earned under performance incentive plan at return on invested capital target level.

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Targeted number of common stock shares to be earned under performance incentive plan at volume target level.

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Targeted number of common stock shares to be earned under performance incentive plan for adjusted Ebitda goal.

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Target level for determination of net debt reduction goals measures.

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Target level for the determination of performance goals and measures.

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Target level for the determination of performance goals and measures for EBITDA goal.

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Valuation per share.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The amount of dividends that can be declared or paid with approval of relevant regulatory agencies.

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Aggregate dividends declared during the period for each share of common stock outstanding.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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Stockholders' Equity - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended			9 Months Ended								3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended				9 Months Ended				9 Months Ended				9 Months Ended				9 Months Ended
	Jul. 12, 2012	Apr. 19, 2012	Feb. 16, 2012	Oct. 31, 2012	Sep. 30, 2012	Sep. 14, 2012	Sep. 01, 2012	Jun. 15, 2012	Mar. 27, 2012	Mar. 16, 2012	Dec. 31, 2011	Sep. 30, 2012 Stock Appreciation Rights (SARs) [Member] General and Administrative Expense [Member]	Sep. 30, 2012 Stock Appreciation Rights (SARs) [Member] General and Administrative Expense [Member]	Sep. 30, 2012 Stock Appreciation Rights (SARs) [Member] Restructuring Charges [Member]	Sep. 30, 2012 Stock Appreciation Rights (SARs) [Member] Restructuring Charges [Member]	Sep. 30, 2012 2012 Three-year PSU Awards [Member]	Sep. 01, 2012 2012 Three-year PSU Awards [Member]	Mar. 27, 2012 2012 Three-year PSU Awards [Member]	Sep. 30, 2012 2012 Three-year PSU Awards [Member] Minimum [Member]	Sep. 30, 2012 2012 Three-year PSU Awards [Member] Maximum [Member]	Sep. 30, 2012 2011 Three-year PSU Awards [Member]	Mar. 11, 2011 2011 Three-year PSU Awards [Member]	Sep. 30, 2012 2011 Three-year PSU Awards [Member] Minimum [Member]	Sep. 30, 2012 2011 Three-year PSU Awards [Member] Maximum [Member]	Sep. 30, 2012 2010 Three-year PSU Awards [Member]	Mar. 08, 2010 2010 Three-year PSU Awards [Member]	Sep. 30, 2012 2010 Three-year PSU Awards [Member] Minimum [Member]	Sep. 30, 2012 2010 Three-year PSU Awards [Member] Maximum [Member]	Sep. 30, 2012 2012 CEO Incentive Compensation [Member]	Mar. 27, 2012 2012 CEO Incentive Compensation [Member]	Sep. 30, 2012 2012 CEO Incentive Compensation [Member] Minimum [Member]	Sep. 30, 2012 2012 CEO Incentive Compensation [Member] Maximum [Member]	Dec. 31, 2012 SLO Awards [Member]	Sep. 30, 2012 SLO Awards [Member]	Mar. 09, 2012 SLO Awards [Member]	Dec. 31, 2011 SLO Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends declared per common share	$ 0.13	$ 0.13	$ 0.13	$ 0.13
Estimated dividend payment				$ 25
Common stock issued				195,000,000	204,493,191						202,528,616
Common stock outstanding				195,000,000	194,422,170						192,062,185
Available cash to pay cash dividend						25		25		25
Compensation expense												3	13	1	8
Payment due to exercise SARs													41		18
Liability for SARs												$ 30	$ 30	$ 1	$ 1
Targeted number of common stock shares to be earned under the performance incentive plan																554,381					380,617				413,642				273,834
Shares to be issued as a percentage of target shares under the performance incentive plan																			0.00%	200.00%			0.00%	200.00%			0.00%	200.00%			0.00%	200.00%
Aggregate increase or decrease in the number of shares earned for all participants based on the performance																55,438					38,062				41,364
Per share price of common stock																	$ 14.27	$ 19.72				$ 26.18				$ 20.88
Target level for the determination of performance goals and measures																100.00%					84.00%				97.00%
Valuation per share							$ 14.27		$ 23.40
Targeted number of common stock shares to be earned under the performance incentive plan at ROIC target level																554,381					159,859				200,616
Percentage targeted number of common stock shares net of forfeiture related to volume goal																					66.00%
Targeted number of common stock shares to be earned under performance incentive plan at volume target level																					125,604				328,845
Maximum level for the determination of performance goals and measures																									159.00%
Common stock share price on grant date																														$ 19.72
Targeted number of common stock shares to be earned under the performance incentive plan for adjusted EBITDA goal																													150,855
Target level for the determination of performance goals and measures for adjusted EBITDA goal																													79.00%
Target level for determination of net debt reduction goals measures																													100.00%
Targeted number of common stock shares to be earned for net debt reduction goals																													82,150
Share based compensation stock award premium																																	25.00%			25.00%
Restricted stock shares and restricted stock units included in SLO Award target																																		77,731	11,212