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Equity Arrangements - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended9 Months Ended1 Months Ended9 Months Ended1 Months Ended12 Months Ended12 Months Ended
Oct. 01, 2011
Oct. 02, 2010
Oct. 01, 2011
Oct. 02, 2010
Jan. 01, 2011
Oct. 01, 2011
Maximum
Capped call (equity options)
Oct. 01, 2011
Minimum
Capped call (equity options)
Nov. 30, 2010
Capped call (equity options)
Oct. 01, 2011
Capped call (equity options)
May 31, 2011
Capped call (equity options)
Series - I
May 31, 2011
Series - I
Jan. 01, 2011
Series B Preferred Stock
Oct. 01, 2011
Minimum
Nov. 30, 2010
Minimum
Oct. 01, 2011
Maximum
Nov. 30, 2010
Maximum
Jan. 01, 2011
Notes payable due in 2018 (junior subordinated)
Oct. 01, 2011
Notes payable due in 2018 (junior subordinated)
Forward share repurchase contract, amount agreed$ 350.0                 
Forward share repurchase contract, shares to be repurchased at the company's option5,581,400 5,581,400               
Forward share repurchase contract,expriration dateAug. 31, 2013Aug. 31, 2013
Over the counter capped call purchased, maturity period       5 years  3 years       
Number of common shares purchased under call option  8,433,123    8,433,1238,433,1232,448,558        
Call option, aggregate premium       50.350.319.6        
Call option, average price       $ 5.97 $ 8.00        
Convertible preferred stock, conversion rate1.3373 1.3373 1.3333             
Shares to be purchase upon conversion of convertible debt           6,325,000      
Convertible preferred stock, initial conversion price$ 74.78 $ 74.78 $ 75.00      $ 100.00      
Percentage of shares tendered under purchase contract which could be delivered before November 17, 201585.00% 85.00%               
Convertible preferred stock, redemption price as a percent of liquidation preference100.00% 100.00%               
Convertible preferred stock, liquidation preference$ 100 $ 100               
Adjusted Strike Price     $ 97.65$ 74.78     $ 70.16$ 74.86$ 80.35$ 97.65  
Number of shares received upon the termination of capped calls  3,052               
Value of shares received upon the termination of capped calls  0.2               
Long-term debt, including current maturities3,256.0 3,256.0 3,434.2           632.5632.5
Proceed from issuance of long-term debt$ 0.9$ 396.3$ 21.4$ 396.3            $ 632.5