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Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Millions, $ in Millions | Total | Common Stock | Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive (Loss) Income
--- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2016 |  | 131 |  |  |
Beginning balance at Dec. 31, 2016 | $ 971 | $ 1 | $ 1,220 | $ (161) | $ (89)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net (loss) income | (67) |  |  | (67) |
Employee stock compensation, employee stock purchase programs and option exercises (in shares) |  | 2 |  |  |
Employee stock compensation, employee stock purchase programs and option exercises, net of tax | 100 |  | 100 |  |
Purchases of treasury stock, retired (in shares) |  | (11) |  |  |
Repurchases of common stock, retired | (351) |  |  | (351) |
Pension and postemployment benefit plans, net of tax | (1) |  |  |  | (1)
Currency translation adjustment | 16 |  |  |  | 16
Ending balance (in shares) at Dec. 31, 2017 |  | 122 |  |  |
Ending balance at Dec. 31, 2017 | 668 | $ 1 | 1,320 | (579) | (74)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net (loss) income | 30 |  |  | 30 |
Employee stock compensation, employee stock purchase programs and option exercises (in shares) |  | 2 |  |  |
Employee stock compensation, employee stock purchase programs and option exercises, net of tax | 98 |  | 98 |  |
Purchases of treasury stock, retired (in shares) |  | (7) |  |  |
Repurchases of common stock, retired | (300) |  |  | (300) |
Pension and postemployment benefit plans, net of tax | (8) |  |  |  | (8)
Unrealized loss on derivatives, net of tax | (6) |  |  |  | (6)
Currency translation adjustment | (13) |  |  |  | (13)
Ending balance (in shares) at Dec. 31, 2018 |  | 117 |  |  |
Ending balance at Dec. 31, 2018 | 495 | $ 1 | 1,418 | (823) | (101)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net (loss) income | (20) |  |  | (20) |
Employee stock compensation, employee stock purchase programs and option exercises (in shares) |  | 2 |  |  |
Employee stock compensation, employee stock purchase programs and option exercises, net of tax | 127 |  | 127 |  |
Purchases of treasury stock, retired (in shares) |  | (8) |  |  |
Repurchases of common stock, retired | (300) |  |  | (300) |
Pension and postemployment benefit plans, net of tax | (21) |  |  |  | (21)
Unrealized loss on derivatives, net of tax | (9) |  |  |  | (9)
Currency translation adjustment | (10) |  |  |  | (10)
Ending balance (in shares) at Dec. 31, 2019 |  | 111 |  |  |
Ending balance at Dec. 31, 2019 | $ 262 | $ 1 | $ 1,545 | $ (1,143) | $ (141)

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