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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ 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 (f)(2)(iii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ 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 (f)(2)(iv)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average expected volatility rate of share-based compensation awards.

+ 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 (f)(2)(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

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- Definition

Expected term of share-based compensation awards, 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 S99
-Paragraph 1
-Subparagraph (SAB TOPIC 14.D.2)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
-Section D
-Subsection 2

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Share-Based Compensation Plans - Terms and Assumptions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Performance Shares 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Price	$ 23.19
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividend yield - weighted average	0.00%
Expected volatility - weighted average	30.00%
Risk-free interest rate - weighted average	1.00%
Expected term in years	2 years 10 months
Weighted-average fair value estimate per grant date (in dollars per share)	$ 28.97
PSUs Granted in 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Price		$ 33.29
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividend yield - weighted average		0.00%
Expected volatility - weighted average		32.00%
Risk-free interest rate - weighted average		0.70%
Expected term in years		2 years 6 months
Weighted-average fair value estimate per grant date (in dollars per share)		$ 24.39
PSUs Granted in 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Price			$ 27.59
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividend yield - weighted average			0.00%
Expected volatility - weighted average			28.00%
Risk-free interest rate - weighted average			0.30%
Expected term in years			1 year 6 months
Weighted-average fair value estimate per grant date (in dollars per share)			$ 23.68
Market Share Units Grantend In 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Price	$ 23.19
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividend yield - weighted average	0.00%
Expected volatility - weighted average	30.00%
Risk-free interest rate - weighted average	1.00%
Expected term in years	2 years 10 months
Weighted-average fair value estimate per grant date (in dollars per share)	$ 30.37
MSUs Granted in 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Price		$ 33.29
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividend yield - weighted average		0.00%
Expected volatility - weighted average		32.00%
Risk-free interest rate - weighted average		0.70%
Expected term in years		2 years 6 months
Weighted-average fair value estimate per grant date (in dollars per share)		$ 23.34
MSUs Granted in 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Price			$ 27.59
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividend yield - weighted average			0.00%
Expected volatility - weighted average			28.00%
Risk-free interest rate - weighted average			0.30%
Expected term in years			1 year 6 months
Weighted-average fair value estimate per grant date (in dollars per share)			$ 27.30