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INCOME (LOSS) PER COMMON SHARE (Tables) | 6 Months Ended
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Jun. 30, 2022
Earnings Per Share [Abstract] |
Schedule of reconciliations of the numerators and denominators used in the computations of basic and diluted earnings per common share | Reconciliations of the numerators and denominators used in the computations of basic and diluted income (loss) per common share were as follows, in millions:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Numerator (basic and diluted): |  |  |  |  |  |  |
Net income (loss) | $ | 278 |  |  | $ | (36) |  |  | $ | 511 |  |  | $ | 58 |
Less: Allocation to redeemable noncontrolling interest | 1 |  |  | — |  |  | — |  |  | 6 |
Less: Allocation to unvested restricted stock awards | 1 |  |  | — |  |  | 2 |  |  | — |
Net income (loss) attributable to common shareholders | $ | 276 |  |  | $ | (36) |  |  | $ | 509 |  |  | $ | 52 |
Denominator: |  |  |  |  |  |  |
Basic common shares (based upon weighted average) | 231 |  |  | 252 |  |  | 235 |  |  | 254 |
Add: Stock option dilution | 2 |  |  | — |  |  | 2 |  |  | 2 |
Diluted common shares | 233 |  |  | 252 |  |  | 237 |  |  | 256 |
Schedule of the Company's Stock Option Activity | The following stock options and restricted stock units were excluded from the computation of weighted-average diluted common shares outstanding due to their anti-dilutive effect, in thousands:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Number of stock options | 670 |  | 2,802 |  | 599 |  | 260
Number of restricted stock units | 249 |  | 464 |  | 17 |  | 1

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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