Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0000874761 (http://www.sec.gov/CIK)

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The following table presents the weighted average fair value of each option grant and the underlying weighted average assumptions, as of the grant date, using the Black-Scholes option-pricing model: December 31,   2015   2014 Expected volatility   25 %   24 % Expected annual dividend yield   3 %   1 % Expected option term (years)   7   6 Risk-free interest rate   1.86 %   1.86 % Fair value at grant date   $ 2.07   $ 3.26
Schedule of Share Based Compensation Summary of Financial Statement Components Stock Options	The following table summarizes the components of stock-based compensation related to employee stock options recognized in the Company's consolidated financial statements (in millions): December 31,   2016   2015   2014 Pretax compensation expense   $ 2   $ 3   $ 3 Tax benefit   (1 )   (1 )   (1 ) Stock options expense, net of tax   $ 1   $ 2   $ 2 Total intrinsic value of options exercised   $ —   $ 1   $ 1 Total fair value of options vested   3   3   2 Cash received from the exercise of stock options   1   5   3
Schedule of Share-based Compensation, Stock Options, Activity	A summary of the option activity for the year ended December 31, 2016 follows (number of options in thousands, dollars in millions except per option amounts):     Options   Weighted Average Exercise Price   Weighted Average Remaining Contractual Term (in years)   Aggregate Intrinsic Value Outstanding at December 31, 2015   7,155   $ 13.81         Exercised   (127 )   11.00         Forfeited and expired   (700 )   17.70         Outstanding at December 31, 2016   6,328   $ 13.43   5.5   $ 2 Vested and expected to vest at December 31, 2016   6,200   $ 13.46   5.5   $ 2 Eligible for exercise at December 31, 2016   4,810   $ 13.72   4.8   $ 2
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,   2016   2015   2014 RSU expense before income tax   $ 14   $ 13   $ 12 Tax benefit   (4 )   (3 )   (3 ) RSU expense, net of tax   $ 10   $ 10   $ 9 Total value of RSUs converted (1)   $ 7   $ 16   $ 25 Total fair value of RSUs vested   $ 13   $ 12   $ 13 _____________________________ (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, 2016 follows (RSUs in thousands):     RSUs   Weighted Average Grant Date Fair Values   Weighted Average Remaining Vesting Term Nonvested at December 31, 2015   2,392   $ 12.55     Vested   (1,063 )   12.43     Forfeited and expired   (256 )   10.91     Granted   1,964   9.42     Nonvested at December 31, 2016   3,037   $ 10.70   1.7 Vested and expected to vest at December 31, 2016   2,716   $ 10.76
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): Years Ended December 31,   2016   2015   2014 RSUs vested during the year   1,063   954   1,037 RSUs converted during the year, net of shares withheld for taxes   705   1,238   1,734 Shares withheld for taxes   358   549   796
Schedule of Share Based Compensation Summary of Financial Statement Components Restricted Stock Units With Market Conditions	The following table summarizes the components of the Company's stock-based compensation related to its PSUs recognized in the Company's consolidated financial statements (in millions): December 31,   2016   2015   2014 PSU expense before income tax   $ 6   $ 5   $ 6 Tax benefit   (2 )   (1 )   (2 ) PSU expense, net of tax   $ 4 $ 4 $ 4 Total value of PSUs converted(1)   $ 1   $ 1   $ 4 Total fair value of PSUs vested   $ 3   $ 3   $ 1 _____________________________ (1)   Amount represents fair market value on the date of conversion.
Schedule of Share Based Compensation Restricted Stock Units With Market Conditions Activity	A summary of the activity of PSUs for the year ended December 31, 2016 follows (PSUs in thousands):     PSUs   Weighted Average Grant Date Fair Values   Weighted Average Remaining Vesting Term Nonvested at December 31, 2015   1,551   $ 12.16     Vested   (231 )   12.23     Forfeited and expired   (308 )   12.28     Granted   697   9.41     Nonvested at December 31, 2016   1,709   $ 11.01   1.3 Vested and expected to vest at December 31, 2016   1,449   $ 10.39
Schedule of Share Based Compensation Restricted Stock Units With Market Condition Vested and Converted	The following table summarizes the PSUs that vested and were converted during the periods indicated (PSUs in thousands): Years Ended December 31,   2016   2015   2014 PSUs vested during the year   231   161   85 PSUs converted during the year, net of shares withheld for taxes   141   96   287 Shares withheld for taxes   90   65   141