Shareholders' Equity - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	6 Months Ended		6 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended
	Jun. 29, 2013	Dec. 31, 2012	Jun. 29, 2013 Stock Repurchase Program	Sep. 30, 2012 Stock Repurchase Program	Oct. 30, 2012 Stock Repurchase Program Maximum	Sep. 30, 2012 Stock Repurchase Program Maximum	Jun. 29, 2013 Payable Q4 2013	Jun. 29, 2013 Payable Q1 2014	Jun. 29, 2013 Payable Q2 2014	Jun. 29, 2013 Payable Q3 and Q4 2013 and Q1 and Q2 2014	Jun. 29, 2013 Payable Q3 2013
Stockholders Equity Note Disclosure [Line Items]
Repurchase of shares of our common stock up to a maximum aggregate value					$ 800.0	$ 400.0
Common stock authorized for repurchase, expiration date				Dec. 31, 2015
Share repurchase program remaining available amount			375.5
Share repurchase (in shares)			9.0
Repurchase of common stock, value	490.3		490.3
Dividends payable amount (USD per share)							$ 0.25	$ 0.25	$ 0.25	$ 1.00	$ 0.25
Dividends payable	$ 199.2	$ 95.0