Stock-Based Plans - Stock Option Activity (Details) - 6 months ended Jun. 30, 2015 - Stock Options - $ / shares shares in Millions	Total
Stock Option Activity (in shares)
Stock options outstanding, beginning of period	10
Granted and assumed	2
Exercised	(3)
Forfeited/expired/canceled	0
Stock options outstanding, end of period	9
Weighted average exercise price of stock options granted during period (usd per share)	$ 50.37
Weighted average grant date fair value of options granted during period (usd per share)	$ 13.39

Gross number of share options (or share units) granted and options assumed during the period.

No definition available.

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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)

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

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

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ 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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- Definition

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

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

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