EARNINGS PER SHARE - Schedule of Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Basic:
Net income	$ 249.7	$ 206.6
Weighted-average shares outstanding (in shares)	207.9	210.2
Basic earnings per share (in dollars per share)	$ 1.20	$ 0.98
Diluted:
Net income	$ 249.7	$ 206.6
Weighted-average shares outstanding (in shares)	207.9	210.2
Dilutive effect of stock plans (in shares)	4.3	4.9
Dilutive weighted-average shares outstanding (in shares)	212.2	215.1
Diluted earnings per share (in dollars per share)	$ 1.18	$ 0.96