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Common Stock - Summary of Stock Option Outstanding Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted-Avg Remaining Contractual Life	6 years 9 months 26 days
Stock Options Outstanding, Shares	10,636,193
Stock Options Outstanding, Weighted - Average Exercise Price	$ 63.29
Stock Options Exercisable, Shares	5,831,091
Stock Options Exercisable, Weighted - Average Exercise Price	$ 53.46
Stock option, Minimum Range	$ 9.14
Stock option, Maximum Range	$ 84.58
Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted-Avg Remaining Contractual Life	4 years 4 months 10 days
Stock Options Outstanding, Shares	3,201,686
Stock Options Outstanding, Weighted - Average Exercise Price	$ 34.43
Stock Options Exercisable, Shares	3,201,686
Stock Options Exercisable, Weighted - Average Exercise Price	$ 34.43
Stock option, Minimum Range	$ 9.14
Stock option, Maximum Range	$ 45.00
Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted-Avg Remaining Contractual Life	8 years 2 months 1 day
Stock Options Outstanding, Shares	3,361,420
Stock Options Outstanding, Weighted - Average Exercise Price	$ 67.84
Stock Options Exercisable, Shares	622,464
Stock Options Exercisable, Weighted - Average Exercise Price	$ 61.32
Stock option, Minimum Range	$ 45.01
Stock option, Maximum Range	$ 70.00
Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted-Avg Remaining Contractual Life	7 years 7 months 17 days
Stock Options Outstanding, Shares	4,073,087
Stock Options Outstanding, Weighted - Average Exercise Price	$ 82.21
Stock Options Exercisable, Shares	2,006,941
Stock Options Exercisable, Weighted - Average Exercise Price	$ 81.39
Stock option, Minimum Range	$ 70.01
Stock option, Maximum Range	$ 84.58

X

- Definition

Share-based compensation shares authorized under stock option plan exercise price range exercisable options weighted average exercise price.

+ References

No definition available.

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X

- Definition

Share-based compensation shares authorized under stock option plan exercise price range outstanding options weighted average exercise price.

+ References

No definition available.

+ Details

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X

- Definition

Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ 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 (e)(2)

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

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ 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 (g)

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

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X

- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ 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)(iii)

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

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ 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)-(ii)

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

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X

- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ 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 (g)

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

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