Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity - Additional Information (Detail)

v2.4.0.8
Shareholders' Equity - Additional Information (Detail) (USD $)
Share data in Millions, except Per Share data, unless otherwise specified
 0 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended
Jul. 30, 2012
May 04, 2012
May 02, 2012
May 03, 2010
Apr. 30, 2009
Jul. 31, 2012
Jun. 30, 2012
Mar. 31, 2012
Jun. 30, 2011
Sep. 30, 2010
Jun. 30, 2010
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Stockholders Equity [Line Items]                            
Common shares, shares outstanding                       101.1 106.9 115.8
Preference shares authorized                       7.5    
Preference shares par value                       $ 0.002    
Dividend declared per common share               $ 0.30 $ 0.20 $ 0.13 $ 0.10 $ 1.20 $ 1.20 $ 0.73
Increase in cash dividends per common share               $ 0.10 $ 0.07 $ 0.03        
Dividend declaration date               Feb. 21, 2012 May 02, 2011 Aug. 02, 2010        
Dividends paid                       $ 123,055,000 $ 135,091,000 $ 85,489,000
Share repurchase program authorized amount 1,000,000,000     1,000,000,000 300,000,000             1,000,000,000    
Previous expiration date of share repurchase program                       Apr. 01, 2011    
Revised expiration date of share repurchase program                       Dec. 01, 2014    
Repurchase of common stock, amount   427,900,000                   306,441,000 556,727,000 321,639,000
Agreement expiration date                       Jul. 27, 2012    
Repurchase of common stock, shares     427.9     3.9 5.3         6.2 11.5 6.0
Share repurchase program expiration date                       Jun. 30, 2017    
Share repurchase program, remaining authorized capacity                       652,600,000    
Repurchase of common shares                       6.1 11.0 5.5
Shares repurchased through open market purchases, aggregate cost                       297,400,000 527,800,000 298,800,000
Average cost per share of shares repurchased                       $ 49.08 $ 47.78 $ 54.27
Other comprehensive income (loss) before reclassifications, Tax benefits                       1,700,000 (1,161,000) 1,455,000
Amounts reclassified from accumulated other comprehensive income (loss) to income, net of tax expense                       700,000    
Foreign Currency Translation Adjustments [Member]
                            
Stockholders Equity [Line Items]                            
Other comprehensive income (loss) before reclassifications, Tax benefits                       (4,300,000)    
Unrealized Gain (Loss) on Derivatives [Member]
                            
Stockholders Equity [Line Items]                            
Other comprehensive income (loss) before reclassifications, Tax benefits                       1,000,000    
Unrealized Gain (Loss) on Available-For-Sale Investments [Member]
                            
Stockholders Equity [Line Items]                            
Other comprehensive income (loss) before reclassifications, Tax benefits                       $ 100,000