EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Basic earnings per share:
Weighted-average shares outstanding									185.5	199.0	202.1
Net earnings attributable to shareholders	$ 167.8	$ 149.3	$ 155.1	$ 72.7	$ 128.0	$ 155.2	$ 162.9	$ 207.4	$ 544.9	$ 653.5	$ 719.8
Dividends and undistributed earnings attributable to unvested shares, basic									(2.2)	(1.7)	(1.3)
Net earnings attributable to shareholders used for basic earnings per share calculation									$ 542.7	$ 651.8	$ 718.5
Net Earnings Attributable to Shareholders (in dollars per share)	$ 0.91	$ 0.80	$ 0.83	$ 0.39	$ 0.67	$ 0.77	$ 0.80	$ 1.02	$ 2.93	$ 3.28	$ 3.55
Diluted earnings per share:
Weighted-average shares outstanding									185.5	199.0	202.1
Incremental Common Shares Attributable to Participating Nonvested Shares with Non-forfeitable Dividend Rights									0.3	0.4	0.6
Weighted-average shares - diluted									185.8	199.4	202.7
Net earnings attributable to shareholders	$ 167.8	$ 149.3	$ 155.1	$ 72.7	$ 128.0	$ 155.2	$ 162.9	$ 207.4	$ 544.9	$ 653.5	$ 719.8
Dividends and undistributed earnings attributable to unvested shares, diluted									(2.2)	(1.7)	(1.3)
Net earnings attributable to shareholders used for diluted earnings per share calculation									$ 542.7	$ 651.8	$ 718.5
Net Earnings Attributable to Shareholders (in dollars per share - diluted)	$ 0.91	$ 0.80	$ 0.83	$ 0.39	$ 0.67	$ 0.77	$ 0.80	$ 1.02	$ 2.92	$ 3.27	$ 3.54
Potential shares outstanding	3.4				2.5				3.4	2.5	2.5
Potential shares outstanding, not included in the diluted earnings per share calculation									3.1	2.1	1.9