Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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

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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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- Definition

Discloses use of the simplified method to calculate the expected term that stock option awards under the specified plan will exist before being exercised or terminated, the reason and justification for its use, and the periods for which the method was used if it was not used in all periods presented.

+ 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)(i)

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

Reference 2: 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.Q6)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Paragraph Question 6 (SAB 110)

-Subsection 2

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- Definition

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

+ References

+ Details

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- Definition

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

+ References

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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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- Definition

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

+ References

No definition available.

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Share-Based Compensation Plans - Terms and Assumptions (Details) (USD $)	0 Months Ended			6 Months Ended	12 Months Ended
	Jul. 11, 2014	Feb. 20, 2014	May 03, 2013	Jul. 11, 2014	Dec. 31, 2012
PSUs Granted in 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period, description	Jan. 1, 2014 to Dec. 31, 2016	Jan. 1, 2014 to Dec. 31, 2016	April 1, 2013 to Dec. 31, 2015
Peferformance Period	3 years	3 years
Share Price	$ 33.29	$ 33.29		$ 33.29
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividend yield - weighted average	0.00%	0.00%
Expected volatility - weighted average	32.00%	38.00%
Risk-free interest rate - weighted average	0.70%	0.70%
Expected term in years	2 years 6 months	2 years 10 months 24 days
Weighted-average fair value estimate per grant date	$ 24.39	$ 30.71
PSUs Granted in 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period, description	April 1, 2013 to Dec. 31, 2015		April 1, 2013 to Dec. 31, 2015
Peferformance Period	2 years 9 months		2 years 9 months
Share Price	$ 27.59		27.59	$ 27.59
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividend yield - weighted average	0.00%		0.00%
Expected volatility - weighted average	28.00%		39.00%
Risk-free interest rate - weighted average	0.30%		0.30%
Expected term in years	1 year 6 months		2 years 8 months 12 days
Weighted-average fair value estimate per grant date	$ 23.68		26.22
MSUs Granted in 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period, description	Jan. 1, 2014 to Dec. 31, 2016	Jan. 1, 2014 to Dec. 31, 2016
Peferformance Period	3 years	3 years
Share Price	$ 33.29	$ 33.29		$ 33.29
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividend yield - weighted average	0.00%	0.00%
Expected volatility - weighted average	32.00%	38.00%
Risk-free interest rate - weighted average	0.70%	0.70%
Expected term in years	2 years 6 months	2 years 10 months 24 days
Weighted-average fair value estimate per grant date	$ 23.34	$ 30.87
MSUs Granted in 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period, description	April 1, 2013 to Dec. 31, 2015		April 1, 2013 to Dec. 31, 2015
Peferformance Period	2 years 9 months		2 years 9 months
Share Price	$ 27.59		27.59	$ 27.59
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividend yield - weighted average	0.00%		0.00%
Expected volatility - weighted average	28.00%		39.00%
Risk-free interest rate - weighted average	0.30%		0.30%
Expected term in years	1 year 6 months		2 years 8 months 12 days
Weighted-average fair value estimate per grant date	$ 27.3		26.42
Stock Options Granted in 2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Price	$ 22.52			$ 22.52	$ 22.55
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividend yield - weighted average				1.50%	1.80%
Expected volatility - weighted average				37.00%	40.00%
Risk-free interest rate - weighted average				0.90%	0.60%
Expected term in years				2 years 6 months	4 years 3 months 0 days
Weighted-average fair value estimate per grant date				$ 7.78	$ 6.32
Stock Options Granted in 2012 [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected term in years				2 years 4 months 24 days	3 years 3 months 7 days
Stock Options Granted in 2012 [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected term in years				2 years 9 months 18 days	5 years 3 months 7 days