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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | N
Schedule of Share Based Compensation Summary of Financial Statement Components Stock Options | N
Schedule of Share-based Compensation, Stock Options, Activity | N
Schedule of Share Based Compensation Summary of Financial Statement Components Restricted Stock Units Without Market Conditions | The following table summarizes the components of the Company's stock-based compensation related to its employee RSUs recognized in the Company's consolidated financial statements (in millions):
December 31, |  | 2017 |  | 2016 |  | 2015
RSU expense before income tax |  | $ | 17 |  |  | $ | 14 |  |  | $ | 13 |
Tax benefit |  | (4 | ) |  | (4 | ) |  | (3 | )
RSU expense, net of tax |  | $ | 13 |  |  | $ | 10 |  |  | $ | 10 |
Total value of RSUs converted (1) |  | $ | 10 |  |  | $ | 7 |  |  | $ | 16 |
Total fair value of RSUs vested |  | $ | 15 |  |  | $ | 13 |  |  | $ | 12 |
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(1) | Amount represents fair market value on the date of conversion.
Schedule of Share Based Compensation Restricted Stock Units Without Market Conditions Activity Table | A summary of the activity of RSUs for the year ended December 31, 2017 follows (RSUs in thousands):
|  | RSUs |  | Weighted Average Grant Date Fair Values |  | Weighted Average Remaining Vesting Term
Non-vested at December 31, 2016 |  | 3,037 |  |  | $ | 10.70 |  |  |
Vested |  | (1,337 | ) |  | 11.37 |  |  |
Forfeited and expired |  | (280 | ) |  | 10.94 |  |  |
Granted |  | 1,546 |  |  | 11.93 |  |  |
Non-vested at December 31, 2017 |  | 2,966 |  |  | $ | 11.02 |  |  | 1.4
Vested and expected to vest at December 31, 2017 |  | 2,711 |  |  | $ | 11.01 |  |  |
Schedule of Share Based Compensation Restricted Stock Units Without Market Condition Vested And Converted | The following table summarizes the RSUs that vested and were converted during the periods indicated (RSUs in thousands):
Year Ended December 31, |  | 2017 |  | 2016 |  | 2015
RSUs vested during the year |  | 1,337 |  |  | 1,063 |  |  | 954 |
RSUs converted during the year, net of shares withheld for taxes |  | 865 |  |  | 705 |  |  | 1,238 |
Shares withheld for taxes |  | 472 |  |  | 358 |  |  | 549 |
Schedule of Share Based Compensation Summary of Financial Statement Components Restricted Stock Units With Market Conditions | .
Schedule of Share Based Compensation Restricted Stock Units With Market Conditions Activity | .
Schedule of Share Based Compensation Restricted Stock Units With Market Condition Vested and Converted |

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- Definition Disclosure of restricted stock units with market conditions vested and converted during the year + References No definition available. + Details
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- Definition For restricted stock units with market conditions, disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. Also includes disclosure of the number, aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both restricted stock units outstanding and restricted stock units fully vested and expected to vest at the date of the latest statement of financial position + References No definition available. + Details
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- Definition Disclosure of restricted stock units without market conditions vested and converted during the year + References No definition available. + Details
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- Definition For restricted stock units without market conditions, disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. Also includes disclosure of the number, aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both restricted stock units outstanding and restricted stock units fully vested and expected to vest at the date of the latest statement of financial position + References No definition available. + Details
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- Definition Summary of the required disclosures representing the effect of restricted stock units with market conditions within the financial statements including pre-tax RSU expense, tax expense (benefit), total value of RSUs converted and total value of RSUs vested + References No definition available. + Details
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- Definition Summary of the required disclosures representing the effect of restricted stock units without market conditions within the financial statements including pre-tax RSU expense, tax expense (benefit), total value of RSUs converted and total value of RSUs vested + References No definition available. + Details
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- Definition Summary of the required disclosures representing the effect of stock options within the financial statements including pre-tax compensation expense, tax expense (benefit), intrinsic value of stock options exercised, fair value of options vested and cash proceeds from stock options exercised + References No definition available. + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: 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=96867065&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=96867065&loc=d3e5070-113901 + Details
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