SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - EARNINGS PER SHARE (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income [Abstract]
Net earnings, basic	$ 119.6	$ 137.2	$ 141.3	$ 113.1	$ 126.4	$ 148.3	$ 151.9	$ 147.2	$ 511.2	$ 573.8	$ 583.1
Net earnings, diluted									$ 511.2	$ 573.8	$ 583.1
Shares [Abstract]
Outstanding shares, basic (in shares)									84.8	90.2	95.7
Dilutive effect of stock options (in shares)									1.1	1.1	0.8
Dilutive effect of restricted stock awards and other (in shares)									0	0	0.3
Dilutive effect of convertible debt, net of tax (in shares)									0.5	0.5	0.6
Outstanding shares, diluted (in shares)									86.4	91.8	97.4
Per Share Amount [Abstract]
Basic earnings per common share	$ 1.41	$ 1.62	$ 1.67	$ 1.33	$ 1.46	$ 1.66	$ 1.65	$ 1.58	$ 6.03	$ 6.36	$ 6.09
Diluted earnings per share (in dollars per share)	$ 1.37	$ 1.59	$ 1.64	$ 1.31	$ 1.43	$ 1.63	$ 1.62	$ 1.56	$ 5.91	$ 6.25	$ 5.99