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Shareholders' Equity - Summary of Stock Option Activity (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement Of Stockholders Equity [Abstract]
Outstanding shares, beginning balance	16,690,472	26,453,152	35,296,895
Options forfeited, shares	(8,400,221)	(9,762,680)	(8,843,743)
Outstanding shares, ending balance	8,290,251	16,690,472	26,453,152
Stock option plans, Lower price range, Beginning Outstanding options	$ 16.73	$ 16.73	$ 16.73
Stock option plans, Upper price range, Beginning Outstanding options	$ 27.21	$ 33.70	$ 39.00
Options forfeited, Lower Range, Price Per Share	$ 16.73	$ 17.08	$ 17.08
Options forfeited, Upper Range, Price Per Share	$ 27.21	$ 33.70	$ 39.00
Stock option plans, Lower price range, Ending Outstanding options	$ 16.73	$ 16.73	$ 16.73
Stock option plans, Upper price range, Ending Outstanding options	$ 27.21	$ 27.21	$ 33.70
Outstanding, Weighted Average Price Per Share, beginning	$ 21.00	$ 24.51	$ 27.17
Options forfeited, Weighted Average Price Per Share	$ 19.39	$ 30.50	$ 35.11
Outstanding, Weighted Average Price Per Share, ending	$ 22.64	$ 21.00	$ 24.51

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- Definition

Notional Amount Of Foreign Currency Cash Flow Hedge Derivatives Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Lower Range Limit.

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Notional Amount Of Foreign Currency Cash Flow Hedge Derivatives Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Upper Range Limit.

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- Definition

Stock option plans, options forfeited, lower range, price per share.

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Stock option plans, options forfeited, upper range, price per share.

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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