NET INCOME PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Basic
Net income	$ 370.8	$ 409.6
Average shares outstanding (in shares)	258,800,000	265,800,000
Basic net income per share (in dollars per share)	$ 1.43	$ 1.54
Diluted
Net income	$ 370.8	$ 409.6
Average shares outstanding assuming dilution:
Average shares outstanding (in shares)	258,800,000	265,800,000
Stock options and other contingently issuable shares (in shares)	4,300,000	4,800,000
Average shares outstanding assuming dilution (in shares)	263,100,000	270,600,000
Diluted net income per share (in dollars per share)	$ 1.41	$ 1.51
Stock options and other contingently issuable shares with anti-dilutive effects (in shares)	1,000,000	0