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Note 12. Stock-Based Compensation Incentive Equity Awards Activity - Summary of Restricted Stock, Restricted Stock Unit, and Performance Unit Activity (Details)
$ / shares in Units, shares in Thousands, $ in Millions

12 Months Ended

Dec. 31, 2015

USD ($)

$ / shares

shares

Restricted Stock

Equity Instruments Other than Options, Number of Shares Roll Forward

Unvested at January 1, 2015 | shares

90

Granted | shares

0

Vested (a) | shares

(90)

^[1]

Forfeited/Expired | shares

0

Unvested at December 31, 2015 | shares

0

Equity Instruments Other than Options, Weighted Average Grant Date Fair Value Roll Forward

Unvested at January 1, 2015 | $ / shares

$ 27.14

Granted | $ / shares

0.00

Vested (a) | $ / shares

27.14

^[1]

Forfeited/Expired | $ / shares

0.00

Unvested at December 31, 2015 | $ / shares

$ 0.00

Fair Value of Shares Vested in Period | $

$ 2

Restricted Stock Units

Equity Instruments Other than Options, Number of Shares Roll Forward

Unvested at January 1, 2015 | shares

740

Granted | shares

630

Vested (a) | shares

(310)

^[1]

Forfeited/Expired | shares

(40)

Unvested at December 31, 2015 | shares

1,020

Equity Instruments Other than Options, Weighted Average Grant Date Fair Value Roll Forward

Unvested at January 1, 2015 | $ / shares

$ 45.83

Granted | $ / shares

46.40

Vested (a) | $ / shares

45.13

^[1]

Forfeited/Expired | $ / shares

46.31

Unvested at December 31, 2015 | $ / shares

$ 46.36

Fair Value of Shares Vested in Period | $

$ 14

Performance Share Units

Equity Instruments Other than Options, Number of Shares Roll Forward

Unvested at January 1, 2015 | shares

370

^[2]

Granted | shares

520

^[2]

Vested (a) | shares

(30)

^[2],[3]

Unvested at December 31, 2015 | shares

860

^[2]

Equity Instruments Other than Options, Weighted Average Grant Date Fair Value Roll Forward

Unvested at January 1, 2015 | $ / shares

$ 46.63

Granted | $ / shares

43.69

Vested (a) | $ / shares

43.72

^[3]

Unvested at December 31, 2015 | $ / shares

$ 44.97

Fair Value of Shares Vested in Period | $

$ 1

[1]	(a)The total fair value of restricted stock and restricted stock units which vested during the year ended December 31, 2015 was $2 million and $14 million, respectively.
[2]	(a)The PSU amounts in the table are shown at the target amount of the award.
[3]	(b)The total fair value of PSUs which vested during the year ended December 31, 2015 was approximately $1 million.

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ 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)(2)(iii)(3)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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X

- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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X

- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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

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X

- Definition

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+ References

No definition available.

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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

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+ References

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- Definition

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

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X

- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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

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X

- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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

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