EARNINGS PER SHARE (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Basic earnings per share:
Weighted-average shares outstanding									204.3	204.7	200.6
Net earnings attributable to shareholders (in dollars)	$ 85.6	$ 144.7	$ 132.1	$ 146.1	$ 99.6	$ 106.1	$ 121.4	$ 125.6	$ 508.5	$ 452.7	$ 399.6
Dividends and undistributed earnings attributable to unvested shares (in dollars)									(1.4)	(1.4)	(0.7)
Net earnings attributable to shareholders used for basic earnings per share calculation (in dollars)									507.1	451.3	398.9
Net earnings attributable to shareholders per share (in dollars per share)	$ 0.42	$ 0.71	$ 0.64	$ 0.71	$ 0.49	$ 0.52	$ 0.59	$ 0.61	$ 2.48	$ 2.20	$ 1.99
Diluted earnings per share:
Weighted-average shares outstanding									204.3	204.7	200.6
Incremental shares outstanding assuming the exercise/vesting of dilutive stock options/performance share awards									0.7	0.4	0.1
Weighted-average shares - diluted									205.0	205.1	200.7
Net earnings attributable to shareholders	85.6	144.7	132.1	146.1	99.6	106.1	121.4	125.6	508.5	452.7	399.6
Dividends and undistributed earnings attributable to unvested shares (in dollars)									(1.4)	(1.4)	(0.7)
Net earnings attributable to shareholders used for diluted earnings per share calculation (in dollars)									$ 507.1	$ 451.3	$ 398.9
Net earnings attributable to shareholders per share (in dollars per share)	$ 0.42	$ 0.70	$ 0.64	$ 0.71	$ 0.48	$ 0.52	$ 0.59	$ 0.61	$ 2.47	$ 2.20	$ 1.99
Potential shares outstanding	2.9				2.3				2.9	2.3	1.7
Potential shares outstanding, not included in the diluted earnings per share calculation									2.2	1.9	1.6