Share-Based Compensation (Option Rollforward) (Details) - Options [Member] - Stock Options [Member] shares in Thousands	12 Months Ended
Dec. 31, 2016 $ / shares shares
Options
Outstanding January 1, 2016 (in shares) \| shares	2,609
Exercised (in shares) \| shares	(451)
Forfeited (in shares) \| shares	(231)
Outstanding December 31, 2016 (in shares) \| shares	1,927
Exercisable at December 31, 2016 (in shares) \| shares	1,436
Weighted Average Exercise Price
Outstanding January 1, 2016 (USD per share) \| $ / shares	$ 36.08
Exercised (USD per share) \| $ / shares	31.90
Forfeited (USD per share) \| $ / shares	44.42
Outstanding December 31, 2016 (USD per share) \| $ / shares	36.02
Exercisable at December 31, 2016 (USD per share) \| $ / shares	$ 35.99

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.

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

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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.

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

+ References

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

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

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

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