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Share-Based Compensation - Schedule of transactions of the Company's stock options (Details) (Stock Option and Incentive Plan [Member], USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Stock Option and Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Options, Unexercised options outstanding, Beginning balance	3.8
Weighted Average Exercise Price, Unexercised options outstanding, Beginning balance	$ 74.04
Stock Options, Options granted	0
Weighted Average Exercise Price, Options granted	$ 191.75
Stock Options, Options exercised	(0.8)
Weighted Average Exercise Price, Options exercised	$ 62.59
Stock Options, Options forfeited	0
Weighted average Exercise Price, Options forfeited	$ 81.49
Stock Options, Unexercised options outstanding, Ending balance	3.0
Weighted Average Exercise Price, Unexercised options outstanding, Ending balance	$ 77.71
Weighted Average Remaining Contractual Life (years), Unexercised options outstanding, Ending balance	3 years 4 months 24 days
Stock Options, Exercisable, Ending balance	2.4
Weighted Average Exercise Price, Exercisable, Ending balance	$ 73.56
Weighted Average Remaining Contractual Life (years), Exerciable, Ending balance	3 years 2 months 12 days

X

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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- Definition

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

+ References

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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

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- Definition

Net number of share options (or share units) granted during the period.

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- Definition

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

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

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

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

+ References

No definition available.

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

+ References

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

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Number of share options (or share units) exercised during the current period.

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