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INCOME PER COMMON SHARE (Tables) | 6 Months Ended
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Jun. 30, 2023
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 per common share were as follows, in millions:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2023 |  | 2022 |  | 2023 |  | 2022
Numerator (basic and diluted): |  |  |  |  |  |  |
Net income | $ | 263 |  |  | $ | 278 |  |  | $ | 468 |  |  | $ | 511 |
Less: Allocation to redeemable noncontrolling interest | — |  |  | 1 |  |  | — |  |  | — |
Less: Allocation to unvested restricted stock awards | — |  |  | 1 |  |  | — |  |  | 2 |
Net income attributable to common shareholders | $ | 263 |  |  | $ | 276 |  |  | $ | 468 |  |  | $ | 509 |
Denominator: |  |  |  |  |  |  |
Basic common shares (based upon weighted average) | 225 |  |  | 231 |  |  | 226 |  |  | 235 |
Add: Stock option dilution | 1 |  |  | 2 |  |  | — |  |  | 2 |
Diluted common shares | 226 |  |  | 233 |  |  | 226 |  |  | 237 |
Schedule of weighted average number of shares | The following stock options, restricted stock units and performance 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,
| 2023 |  | 2022 |  | 2023 |  | 2022
Number of stock options | 897 |  | 670 |  | 843 |  | 599
Number of restricted stock units | 113 |  | 249 |  | 202 |  | 17 |
Number of performance restricted stock units | 15 |  | — |  |  | 15 |  | — |

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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 -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + 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 -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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