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EQUITY (Tables) | 12 Months Ended
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Dec. 31, 2021
Equity [Abstract] |
Schedule of Total Outstanding Shares | Total outstanding shares of common stock and treasury stock were as follows:
(in millions) |  | Shares of Common Stock |  | Shares of Treasury Stock |  | Outstanding Shares
Balance at December 31, 2018 |  | 264.5 |  |  | (41.5) |  |  | 223.0 |
Shares of treasury stock issued |  | — |  |  | 3.1 |  |  | 3.1 |
Repurchase of common stock at an average cost of $54.18 |  | — |  |  | (4.8) |  |  | (4.8) |
Balance at December 31, 2019 |  | 264.5 |  |  | (43.2) |  |  | 221.3 |
Shares of treasury stock issued |  | — |  |  | 1.1 |  |  | 1.1 |
Repurchase of common stock at an average cost of $38.25 |  | — |  |  | (3.7) |  |  | (3.7) |
Balance at December 31, 2020 |  | 264.5 |  |  | (45.8) |  |  | 218.7 |
Shares of treasury stock issued |  | — |  |  | 2.2 |  |  | 2.2 |
Repurchase of common stock at an average cost of $57.47 |  | — |  |  | (3.5) |  |  | (3.5) |
Balance at December 31, 2021 |  | 264.5 |  |  | (47.1) |  |  | 217.4 |

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