SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Reconciliation of Weighted-Average Outstanding Shares used in Calculations of Basic and Diluted EPS (Details) - shares shares in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
|
| Accounting Policies [Abstract] | ||
| Weighted-average shares outstanding (basic) (in shares) | 121.3 | 120.7 |
| Effect of dilutive securities: | ||
| Stock options and restricted stock units (in shares) | 1.3 | 0.9 |
| Weighted-average shares outstanding (diluted) (in shares) | 122.6 | 121.6 |