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Compensation Plans - Others (Details) $ / shares in Units, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 USD ($) item $ / shares shares | Dec. 31, 2015 USD ($) $ / shares shares | Dec. 31, 2014 USD ($) shares | May 01, 2014 shares
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Total share-based compensation expense recognized | $ | $ 23.0 | $ 26.0 | $ 22.0 |
Deferred compensation cost | $ | $ 14.0 | $ 19.0 |  |
Total unrecognized compensation cost, period of recognition | 3 years |  |  |
Number of impacted participants on spin off | item | 133 |  |  |
Business days, period | 5 days |  |  |
Common Stock Options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Information |  |  |  |
Stock-based awards, vesting period | 10 years |  |  |
Shares under Options (in shares) | 1,300,000 | 1,700,000 |  |
Currently Exercisable - Shares Under Options (in shares) | 1,200,000 | 1,400,000 |  |
Proceeds received from options exercised | $ | $ 4.0 | $ 28.0 | $ 5.0 |
Restricted Stock and Performance Restricted Stock Units |  |  |  |
Restricted Stock and Performance Restricted Stock Units |  |  |  |
Shares withheld to offset tax withholding obligations (in shares) | 237,000 | 200,000 | 323,000 |
Unvested restricted stock and performance restricted stock units activity |  |  |  |
Weighted-average remaining vesting period of restricted stock and restricted stock units | 1 year |  |  |
Total fair values (at vesting) of restricted stock and restricted stock units vested | $ | $ 24.0 | $ 21.0 | $ 24.0 |
Restricted stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Information |  |  |  |
Stock-based awards, vesting period | 3 years |  |  |
Unvested restricted stock and performance restricted stock units activity |  |  |  |
Unvested at the beginning of the period (in shares) | 36,000 |  |  |
Vested (in shares) | (36,000) |  |  |
Unvested at the end of the period (in shares) |  | 36,000 |  |
Unvested at the beginning of the period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares | $ 41.77 |  |  |
Vested, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares | $ 41.77 |  |  |
Unvested at the end of the period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares |  | $ 41.77 |  |
Restricted Stock Units |  |  |  |
Unvested restricted stock and performance restricted stock units activity |  |  |  |
Unvested at the beginning of the period (in shares) | 867,000 |  |  |
Granted (in shares) | 790,000 |  |  |
Vested (in shares) | (528,000) |  |  |
Forfeited (in shares) | (167,000) |  |  |
Unvested at the end of the period (in shares) | 962,000 | 867,000 |  |
Unvested at the beginning of the period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares | $ 43.34 |  |  |
Granted, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares | 34.86 |  |  |
Vested, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares | 42.07 |  |  |
Forfeited, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares | 41.48 |  |  |
Unvested at the end of the period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares | $ 37.39 | $ 43.34 |  |
Minimum | Common Stock Options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Information |  |  |  |
Stock-based awards, vesting period | 3 years |  |  |
Minimum | Restricted stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Information |  |  |  |
Stock-based awards, vesting period | 1 year |  |  |
Unvested restricted stock and performance restricted stock units activity |  |  |  |
Percentage of performance metrics during performance period | 0.00% |  |  |
Maximum | Common Stock Options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Information |  |  |  |
Stock-based awards, vesting period | 5 years |  |  |
Maximum | Restricted stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Information |  |  |  |
Stock-based awards, vesting period | 4 years |  |  |
Unvested restricted stock and performance restricted stock units activity |  |  |  |
Percentage of performance metrics during performance period | 200.00% |  |  |
Former Chairman, Chief Executive Officer and President |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Total share-based compensation expense recognized | $ | $ 7.0 |  |  |
2006 Incentive Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Maximum number of shares available for future awards (in shares) |  |  |  | 0
2014 Incentive Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Maximum number of shares reserved for awards (in shares) |  |  |  | 33,000,000
Maximum number of shares available for future awards (in shares) | 31,000,000 |  |  |
Maximum number of shares available for future awards to be issued as restricted stock and performance restricted stock unit | 21,000,000 |  |  |

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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 + Details
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