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Share-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2014
Share-Based Compensation Plans [Abstract] |
Stock option activity | A summary of stock option activity is as follows:
|  |  |  |  |  |  |  | Wtd. Avg. |  |  |  |
|  |  |  |  | Wtd. Avg. |  |  | Remaining |  |  | Aggregate |
|  |  |  |  | Exercise Price |  |  | Contractual Term |  |  | Intrinsic Value |
|  | Shares (000) |  |  | Per Share |  |  | (years) |  |  | (in millions) |
Outstanding, January 1, 2012 |  |  | 5,265 |  |  | $ | 50 |  |  |  |  |  |  |  |  |
Granted |  |  | 302 |  |  |  | 45 |  |  |  |  |  |  |  |  |
Exercised |  |  | (116 | ) |  |  | 34 |  |  |  |  |  |  | $ | 1 |
Expired or cancelled |  |  | (107 | ) |  |  | 51 |  |  |  |  |  |  |  |  |
Outstanding, December 31, 2012 |  |  | 5,344 |  |  | $ | 50 |  |  |  | 5.0 |  |  | $ | 14 |
Vested or expected to vest, December 31, 2012 |  |  | 5,326 |  |  | $ | 50 |  |  |  | 4.9 |  |  |  |  |
Exercisable, December 31, 2012 |  |  | 4,210 |  |  | $ | 51 |  |  |  | 4.3 |  |  | $ | 11 |
Outstanding, January 1, 2013 |  |  | 5,344 |  |  | $ | 50 |  |  |  |  |  |  |  |  |
Granted |  |  | 221 |  |  |  | 53 |  |  |  |  |  |  |  |  |
Exercised |  |  | (2,576 | ) |  |  | 43 |  |  |  |  |  |  | $ | 63 |
Expired or cancelled |  |  | (206 | ) |  |  | 51 |  |  |  |  |  |  |  |  |
Outstanding, December 31, 2013 |  |  | 2,783 |  |  | $ | 57 |  |  |  | 5.1 |  |  | $ | 81 |
Vested or expected to vest, December 31, 2013 |  |  | 2,769 |  |  | $ | 57 |  |  |  | 4.8 |  |  |  |  |
Exercisable, December 31, 2013 |  |  | 2,153 |  |  | $ | 58 |  |  |  | 4.2 |  |  | $ | 60 |
Outstanding, January 1, 2014 |  |  | 2,783 |  |  | $ | 57 |  |  |  |  |  |  |  |  |
Granted |  |  | 204 |  |  |  | 77 |  |  |  |  |  |  |  |  |
Exercised |  |  | (473 | ) |  |  | 53 |  |  |  |  |  |  | $ | 13 |
Expired or cancelled |  |  | (30 | ) |  |  | 43 |  |  |  |  |  |  |  |  |
Outstanding, December 31, 2014 |  |  | 2,484 |  |  | $ | 59 |  |  |  | 4.7 |  |  | $ | 28 |
Vested or expected to vest, December 31, 2014 |  |  | 2,476 |  |  | $ | 59 |  |  |  | 4.5 |  |  |  |  |
Exercisable, December 31, 2014 |  |  | 1,957 |  |  | $ | 59 |  |  |  | 3.7 |  |  | $ | 23 |
Options outstanding and exercisable | Options outstanding and exercisable as of December 31, 2014 are as follows:
|  | Options Outstanding |  |  | Options Exercisable |
|  |  |  |  | Weighted- |  |  |  |  |  |  |  |  |  |
|  |  |  |  | Average |  |  |  |  |  |  |  |  |  |
|  |  |  |  | Remaining |  |  | Weighted- |  |  |  |  |  | Weighted- |
|  |  |  |  | Contractual |  |  | Average |  |  |  |  |  | Average |
Exercise Price |  | Shares (000) |  |  | Life (years) |  |  | Exercise Price |  |  | Shares (000) |  |  | Exercise Price |
$27–$34 |  |  | 150 |  |  |  | 3.8 |  |  | $ | 31 |  |  |  | 150 |  |  | $ | 31 |
$35–$44 |  |  | 212 |  |  |  | 5.4 |  |  |  | 45 |  |  |  | 93 |  |  |  | 45 |
$45–$55 |  |  | 818 |  |  |  | 5.2 |  |  |  | 53 |  |  |  | 658 |  |  |  | 53 |
$56–$93 |  |  | 1,304 |  |  |  | 4.0 |  |  |  | 69 |  |  |  | 1,056 |  |  |  | 67 |
|  |  | 2,484 |  |  |  | 4.7 |  |  | $ | 59 |  |  |  | 1,957 |  |  | $ | 59 |
Assumptions used to estimate fair value of share awards | We estimated the fair value of each stock option on the date of grant using the Black-Scholes option pricing model and the following assumptions:
Year Ended December 31 |  | 2014 |  |  | 2013 |  |  | 2012 |
Average risk-free interest rate |  |  | 1.8 | % |  |  | 1.1 | % |  |  | 1.1 | %
Expected dividend yield |  |  | 1.2 | % |  |  | 1.7 | % |  |  | 1.8 | %
Expected volatility |  |  | 37.0 | % |  |  | 42.0 | % |  |  | 44.0 | %
Expected term (years) |  |  | 5.9 |  |  |  | 5.9 |  |  |  | 5.9 |
Restricted stock activity | A summary of restricted stock activity is as follows:
|  |  |  |  |  |  |  | Wtd. Avg |  |  |  |
|  |  |  |  |  |  |  | Remaining |  |  | Aggregate |
|  |  |  |  | Wtd. Avg. |  |  | Contractual |  |  | Intrinsic Value |
|  | Shares (000) |  |  | Price Per Share |  |  | Term (years) |  |  | (in millions) |
Unvested, January 1, 2012 |  |  | 409 |  |  | $ | 59 |  |  |  | 1.8 |  |  |  |  |
Granted |  |  | 309 |  |  |  | 44 |  |  |  |  |  |  |  |  |
Vested |  |  | (124 | ) |  |  | 40 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (5 | ) |  |  | 67 |  |  |  |  |  |  |  |  |
Unvested, December 31, 2012 |  |  | 589 |  |  | $ | 55 |  |  |  | 1.7 |  |  |  |  |
Granted |  |  | 192 |  |  | $ | 52 |  |  |  |  |  |  |  |  |
Vested |  |  | (90 | ) |  |  | 52 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (64 | ) |  |  | 56 |  |  |  |  |  |  |  |  |
Unvested, December 31, 2013 |  |  | 627 |  |  | $ | 54 |  |  |  | 1.3 |  |  |  |  |
Granted |  |  | 169 |  |  | $ | 77 |  |  |  |  |  |  |  |  |
Vested |  |  | (283 | ) |  |  | 63 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (50 | ) |  |  | 53 |  |  |  |  |  |  |  |  |
Unvested, December 31, 2014 |  |  | 463 |  |  | $ | 57 |  |  |  | 1.2 |  |  | $ | 32 |
Performance share units detail by grant year | A summary of the performance share units detail by grant year is as follows:
|  |  |  |  | July 2012 and |  |  |  |  |  |  |
|  | 2012 |  |  | February 2013 |  |  | 2013(a) |  |  | 2014(b) |
Grant Date(s) |  |  | February 15, |  |  |  | July 1, 2012 and |  |  |  | February 14, |  |  |  | February 11, |
|  |  | 2012 |  |  |  | February 14, |  |  |  | 2013 |  |  |  | 2014 and |
|  |  |  |  |  |  | 2013 |  |  |  |  |  |  |  | May 1, 2014 |
Performance Period (Years) |  |  | 2012 |  |  |  | 2012–2014 |  |  |  | 2013 |  |  |  | 2014–2016 |
Vesting Date(s) |  |  | 50% on |  |  |  | 50% on |  |  |  | 50% on |  |  |  | 100% on |
|  |  | December 31, |  |  |  | July 1, |  |  |  | December 31, |  |  |  | December 31, |
|  |  | 2013 and 2014 |  |  |  | 2015 and 2016 |  |  |  | 2014 and 2015 |  |  |  | 2016 |
Payout Levels (in units): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold Award |  |  | 84,480 |  |  |  | 66,949 |  |  |  | 76,120 |  |  |  | 94,608 |
Target Award |  |  | 168,960 |  |  |  | 133,898 |  |  |  | 152,240 |  |  |  | 189,215 |
Outstanding Award |  |  | 337,920 |  |  |  | 267,796 |  |  |  | 304,480 |  |  |  | 378,430 |
Units Forfeited in 2014 (at Target Award level) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Shares Issued in 2014 |  |  | 72,843 |  |  |  | — |  |  |  | 101,239 |  |  |  | — |
Shares Subject to Holding Period as of December 31, 2014 |  |  | — |  |  |  | — |  |  |  | 108,853 |  |  |  | — |
% of the Target Performance Level based on the Current/Expected Average Operating Profit Margin over the Performance Period |  |  | 96 | % |  |  | 0 | % |  |  | 140 | % |  |  | 200 | %
(a) | Included in these figures are 7,612 of performance share units that were granted on February 14, 2013 with a separate performance period, performance criteria and vesting date. The performance period is 2013 through 2015, with a vesting date of July 1, 2016. The award’s current performance level is at Target.
(b) | Included in these figures are 3,046 of performance share units that were granted on October 29, 2014 with a separate performance period, performance criteria and vesting date. The performance period is June 1, 2015 through December 31, 2016, with a vesting date of October 29, 2017. The award’s current performance level is at Target.

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + 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 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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