STOCK-BASED COMPENSATION - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended				6 Months Ended			3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 Year	Jun. 30, 2010	Jun. 30, 2011 Stock Incentive Plan 2010	Apr. 27, 2010 Stock Incentive Plan 2010	Jun. 30, 2011 2005 Stock Incentive Plan	Jun. 30, 2011 Long Term Performance Plan 2008-2010	Jun. 30, 2010 Long Term Performance Plan 2007 to 2009	Jun. 30, 2011 Share Based Liability Awards	Jun. 30, 2010 Share Based Liability Awards	Jun. 30, 2011 Share Based Liability Awards	Jun. 30, 2010 Share Based Liability Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Incentive Plan, common shares authorized						3,000,000	4,000,000
Stock Incentive Plan, maximum number of shares can be settled as full-value awards						1,500,000
Stock Incentive Plan, arrangement description					The 2010 Plan provides for the granting of up to 3,000,000 common shares in the form of stock appreciation rights, restricted and unrestricted shares and share units (collectively referred to as “full-value awards”), and options to buy common shares, of which no more than 1,500,000 can be settled as full-value awards. After the 1,500,000 limit has been reached, full-value awards are counted in a 3-to-1 ratio against the 3,000,000 limit.
Options exercising percentage one year after date of grant						50.00%	50.00%
Options exercising percentage two year after date of grant						75.00%	75.00%
Options exercising percentage three year after date of grant						100.00%	100.00%
Options expiration duration (in years)					10 years after grant		10 years after grant
Stock Incentive Plan termination date					2015-04-01		2010-04-01
Stock options granted			77,500	91,800
Performance-based share units			82,150	106,500
Share based Compensation Policy for Issuing Shares upon Exercise			The company uses previously purchased treasury shares for all shares issued for option exercises and performance-based and restricted share units.
Proceeds from the exercise of stock options			$ 9.1	$ 16.7
Excess tax benefit from the exercise of stock options and awards			11.7	9.7
Performance based plan, issuance of shares								178,081	213,960
Performance based plan, deferral of shares into deferred compensation plan								26,179	20,576
Performance-based share units granted to international employees description			The terms of the performance-based share units granted to international employees state that payment will be in cash at the end of the performance period. In addition, some international employees received stock-based awards in prior years that are similar to stock appreciation rights. As such, liability accounting is used for both of these awards and compensation expense is calculated based on the company’s common share price.
Total stock-based compensation expense recognized in the consolidated statements of operations	4.7	3.7	12.6	11.0
Total stock-based compensation expense recognized in the consolidated statements of operations, related tax benefit	1.7	1.3	4.4	3.8
Total pre-tax unrecognized compensation cost related to all stock-based awards that were not vested	24.1		24.1
Total pre-tax unrecognized compensation cost related to all stock-based awards that were not vested, expected weighted-average period to be recognized			1.8
Total stock-based compensation (credit) expense recognized in the consolidated statements of operations										$ 0.8	$ (1.5)	$ 4.6	$ 1.9