SUMMARY OF SIGNIFICANT ACCOUNTING - EARNINGS PER SHARE - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income [Abstract]
Net earnings, basic	$ 1,556.1	$ 823.8	$ 883.7
Net earnings, diluted	$ 1,556.1	$ 823.8	$ 883.7
Shares [Abstract]
Stock Options (in shares)	0.2	0.2	0.1
Outstanding shares, basic (in shares)	97.3	97.9	101.4
Dilutive effect of stock options (in shares)	0.7	0.7	1.2
Dilutive effect of convertible debt, net of tax (in shares)	0.0	0.0	0.0
Outstanding shares, diluted (in shares)	98.0	98.6	102.6
Per Share Amount [Abstract]
Earnings Per Share, Basic	$ 15.99	$ 8.42	$ 8.71
Diluted earnings per share (in dollars per share)	$ 15.88	$ 8.35	$ 8.61