Note 12. Stock-Based Compensation Introduction Narrative (Details) shares in Millions	12 Months Ended
Dec. 31, 2015 Performance_metrics shares	Dec. 31, 2014 Performance_metrics
Retirement Eligibility Age	65 years
Retirement Eligibility Age with Ten Years of Service	55 years
Retirement Eligibility Years Tenure	10 years
Retirement Eligibility Service Requirement	1 year
Shares authorized for issuance under the plan (in shares) \| shares	9.6
Shares available for future grant under the plan (in shares) \| shares	1.4
Options
Stock options vesting period	4 years
Contractual Term	10 years
Annual Vesting Percentage	25.00%
Performance Share Units
Stock options vesting period	3 years
Restricted Stock Units
Stock options vesting period	3 years
Annual Vesting Percentage	33.33%
2014 \| Performance Share Units
Stock options vesting period		3 years
Number of performance metrics		2
2014 \| Debt and EBITDA Margin Metrics [Member] \| Minimum [Member] \| Performance Share Units
Award Vesting Percentage		0.00%
2014 \| Debt and EBITDA Margin Metrics [Member] \| Maximum [Member] \| Performance Share Units
Award Vesting Percentage		200.00%
2015 \| Performance Share Units
Stock options vesting period	3 years
Number of performance metrics	2
The first performance metric	1
2015 \| RTSR [Member] \| Minimum [Member] \| Performance Share Units
Award Vesting Percentage	0.00%
2015 \| RTSR [Member] \| Maximum [Member] \| Performance Share Units
Award Vesting Percentage	175.00%
2015 \| Cumulative Free Cash Flow [Member] \| Minimum [Member] \| Performance Share Units
Award Vesting Percentage	0.00%
2015 \| Cumulative Free Cash Flow [Member] \| Maximum [Member] \| Performance Share Units
Award Vesting Percentage	200.00%

Number of performance metrics

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- Definition

Age attained for which the retirement provision for equity grants provides for continued vesting of awards provided they have been employed or provided services to the Company for one year following the date of grant.

+ References

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Age attained for which the retirement provision for equity grants provides for continued vesting of awards if the employee has at least ten years of tenure with the Company and provided they have been employed or provided services to the Company for one year following the date of grant.

+ References

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Number of years of service required following the grant date or start of the performance period in order to qualify for the retirement provision for equity grants.

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Number of years of tenure with the Company required for employees aged 55 to qualify for the retirement provision for equity grants.

+ References

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Annual percentage of vesting of share-based compensation awards.

+ References

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- Definition

The first performance metric

+ References

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, 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 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ 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 (a)(3)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

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

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- Definition

Percentage of vesting of share-based compensation awards.

+ References

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- Definition

Period from grant date that an equity-based award expires, 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 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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