NET INCOME PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Basic
Net income	$ 577.9	$ 370.8	$ 648.6	$ 409.6	$ 948.7	$ 1,058.2
Average shares outstanding (in shares)	258,100,000		262,800,000		258,500,000	264,300,000
Basic net income per share (in dollars per share)	$ 2.24		$ 2.47		$ 3.67	$ 4.00
Diluted
Net income	$ 577.9	$ 370.8	$ 648.6	$ 409.6	$ 948.7	$ 1,058.2
Average shares outstanding assuming dilution:
Average shares outstanding (in shares)	258,100,000		262,800,000		258,500,000	264,300,000
Stock options and other contingently issuable shares (in shares)	3,700,000		5,000,000.0		4,000,000.0	4,700,000
Average shares outstanding assuming dilution (in shares)	261,800,000		267,800,000		262,500,000	269,000,000.0
Diluted net income per share (in dollars per share)	$ 2.21		$ 2.42		$ 3.61	$ 3.93
Stock options and other contingently issuable shares with anti-dilutive effects (in shares)	1,000,000		0		1,000,000	0