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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions | Total | Class A Common Stock | Additional Paid-in Capital | Treasury Stock | Retained Earnings | Retained Earnings New Accounting Pronouncement, Early Adoption, Effect | Accumulated Other Comprehensive Loss
--- | --- | --- | --- | --- | --- | --- | ---
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning Balance, Shares |  | 51,654,337 |  |  |  |  |
Beginning Balance at Dec. 31, 2014 | $ 1,040 | $ 1 | $ 147 | $ (634) | $ 1,535 |  | $ (9)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning Balance, Shares |  | 52,161,851 |  |  |  |  |
Issuance of treasury shares upon exercise of stock options, purchases under stock purchase plan and grants of restricted stock awards, shares |  | 646,395 |  |  |  |  |
Issuance of treasury shares upon exercise of stock options, purchases under stock purchase plan and grants of restricted stock awards net of cancellations | 17 |  | 1 | 16 |  |  |
Shares withheld related to net share settlement (in shares) |  | (138,881) |  |  |  |  |
Shares withheld related to net share settlement (in shares) | (13) |  |  | (13) |  |  |
Issuance of warrants exercisable for 250,000 shares, exercise price $89.34, expiration April 5, 2017 | 4 |  | 4 |  |  |  |
Additional tax benefit resulting from exercise of options | 11 |  | 11 |  |  |  |
Share-based compensation | 31 |  | 31 |  |  |  |
Net income (loss) | (158) |  |  |  | (158) |  |
Unrealized loss on anticipated sales hedging transactions (net of income taxes) | (6) |  |  |  |  |  | (6)
Unrealized gain on forward interest rate swaps hedging transactions (net of income taxes) | (7) |  |  |  |  |  | (7)
Foreign currency translation adjustment | (26) |  |  |  |  |  | (26)
Ending Balance at Dec. 31, 2015 | 893 | $ 1 | 194 | (631) | 1,377 |  | (48)
Ending Balance, Shares at Dec. 31, 2015 |  | 52,161,851 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning Balance, Shares |  | 52,161,851 |  |  |  |  |
Beginning Balance, Shares |  | 52,884,588 |  |  |  |  |
Issuance of treasury shares upon exercise of stock options, purchases under stock purchase plan and grants of restricted stock awards, shares |  | 817,943 |  |  |  |  |
Issuance of treasury shares upon exercise of stock options, purchases under stock purchase plan and grants of restricted stock awards net of cancellations | 11 |  | (14) | 25 |  |  |
Shares withheld related to net share settlement (in shares) |  | (95,206) |  |  |  |  |
Shares withheld related to net share settlement (in shares) | (8) |  |  | (8) |  |  |
Additional tax benefit resulting from exercise of options | 3 |  | 3 |  |  |  |
Share-based compensation | 27 |  | 27 |  |  |  |
Net income (loss) | (137) |  |  |  | (137) |  |
Unrealized loss on anticipated sales hedging transactions (net of income taxes) | 7 |  |  |  |  |  | 7
Unrealized gain on forward interest rate swaps hedging transactions (net of income taxes) | 0 |  |  |  |  |  | 0
Foreign currency translation adjustment | (4) |  |  |  |  |  | (4)
Ending Balance at Dec. 31, 2016 | 792 | $ 1 | 210 | (614) | 1,240 |  | (45)
Ending Balance, Shares at Dec. 31, 2016 |  | 52,884,588 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning Balance, Shares |  | 52,884,588 |  |  |  |  |
Beginning Balance, Shares |  | 53,236,095 |  |  |  |  |
Issuance of treasury shares upon exercise of stock options, purchases under stock purchase plan and grants of restricted stock awards, shares |  | 410,239 |  |  |  |  |
Issuance of treasury shares upon exercise of stock options, purchases under stock purchase plan and grants of restricted stock awards net of cancellations | 12 |  | 12 | 0 |  |  |
Shares withheld related to net share settlement (in shares) |  | (58,732) |  |  |  |  |
Shares withheld related to net share settlement (in shares) | (6) |  |  | (6) |  |  |
Share-based compensation | 35 |  | 35 |  |  |  |
Net income (loss) | 17 |  |  |  | 17 |  |
Unrealized loss on anticipated sales hedging transactions (net of income taxes) | (15) |  |  |  |  |  | (15)
Unrealized gain on forward interest rate swaps hedging transactions (net of income taxes) | 6 |  |  |  |  |  | 6
Foreign currency translation adjustment | 2 |  |  |  |  |  | 2
Ending Balance at Dec. 31, 2017 | 834 | $ 1 | $ 257 | $ (620) | $ 1,248 |  | $ (52)
Ending Balance, Shares at Dec. 31, 2017 |  | 53,236,095 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning Balance, Shares |  | 53,236,095 |  |  |  |  |
Cumulative effect of change in accounting principle | $ 9 |  |  |  |  |  |
Cumulative effect of change in accounting principle | ASU 2016-16 |  |  |  |  |  | $ 9 |

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