Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended					9 Months Ended		1 Months Ended							9 Months Ended
	Sep. 29, 2012	Sep. 29, 2012 CPT	Dec. 31, 2011 CPT	Oct. 01, 2011 CPT	Sep. 29, 2012 Minimum	Sep. 29, 2012 Maximum	Sep. 29, 2012 Senior Notes	Sep. 29, 2012 Credit Facility	Apr. 30, 2011 Credit Facility	Sep. 29, 2012 Other Credit Facilities	Sep. 29, 2012 Senior Notes Five Point Six Five Zero Percent Fixed Rate	Sep. 29, 2012 Senior Notes Five Point Six Five Zero Percent Fixed Rate Minimum	Sep. 29, 2012 Senior Notes Five Point Six Five Zero Percent Fixed Rate Maximum	Sep. 29, 2012 Senior Notes One Point Zero Five Zero Percent Due Twenty Thirteen Floating Rate	Sep. 29, 2012 Senior Notes One Point Zero Five Zero Percent Due Twenty Thirteen Senior Notes	Sep. 29, 2012 Senior Notes Three Point One Five Zero Percent Due Twenty Twenty Two	Sep. 29, 2012 Senior Notes Three Point One Five Zero Percent Due Twenty Twenty Two Fixed Rate	Sep. 29, 2012 Notes One Point Eight Seven Five Percent Due Twenty Seventeen	Sep. 29, 2012 Notes One Point Eight Seven Five Percent Due Twenty Seventeen Fixed Rate	May 31, 2011 Senior Notes, 5.00 Percent Due 2021	Sep. 29, 2012 Senior Notes, 5.00 Percent Due 2021 Fixed Rate	Sep. 29, 2012 Fair Value, Inputs, Level 2	Dec. 31, 2011 Fair Value, Inputs, Level 2	Oct. 01, 2011 Fair Value, Inputs, Level 2
Debt Disclosure [Line Items]
Fair value of total debt																						$ 2,105	$ 1,361	$ 1,400
Aggregate principal amount																550		350		500
Debt, interest rate											5.65%					3.15%		1.875%		5.00%
Debt, maturity year												2013	2017	2013		2022	2022	2017	2017	2021	2021
Debt instrument proceeds used to repay amounts of other debt	435								105
Credit facility maximum borrowing capacity								1,450.0	700.0	74.1
Previous revolving credit facility								700
Credit facility expiration date								Sep. 30, 2017
Facility Fees								0.00100
Facility Fees								0.00300
Outstanding aggregate principal											400
Floating rate notes														1.05%
Senior Notes Redemption Value															100
Whole Premium Amount							65.8
Unamortized deferred financing costs							0.5
Terminate related interest rate swaps							3.6
Credit facility interest rate, before the addition of LIBOR									1.75%
Commercial paper outstanding	100
Remaining availability under Credit Facility								1,392
Cost and expenses incurred in connection with acquisition						40
Debt agreement financial covenant, leverage ratio					3.50	3.00
Compliance with debt agreement financial covenants	We were in compliance with all financial covenants in our debt agreements.
Line of credit facility, amount outstanding										9.0
Capital lease obligation cost		42.4	22.7	23.9
Accumulated amortization		5.5	5.1	5.1
Future minimum lease payments	32.4
Imputed interest	$ 2.6