Equity Arrangements - Additional Information (Detail) (USD $)	1 Months Ended			3 Months Ended		6 Months Ended		12 Months Ended			1 Months Ended	12 Months Ended				1 Months Ended	3 Months Ended	1 Months Ended		12 Months Ended				12 Months Ended
	Dec. 31, 2013	Aug. 31, 2013	Jan. 31, 2013	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013	Dec. 31, 2011	Dec. 28, 2013	Nov. 30, 2010	Nov. 30, 2010 Call Option [Member]	Dec. 28, 2013 Call Option [Member]	Jun. 28, 2014 Call Option [Member]	Dec. 28, 2013 Notes 2 Point 25 Percent due 2018 [Member]	Nov. 30, 2010 Convertible notes payable due in 2018 (junior subordinated)	Nov. 30, 2010 Maximum [Member] Call Option [Member]	Jun. 28, 2014 Maximum [Member] Call Option [Member]	Nov. 30, 2010 Minimum [Member] Call Option [Member]	Nov. 30, 2010 Convertible Preferred Units	Dec. 28, 2013 Convertible Preferred Units	Jun. 28, 2014 Convertible Preferred Units	Nov. 30, 2010 Convertible Preferred Units On or after December 22, 2015	Dec. 28, 2013 Convertible Preferred Units Maximum [Member]	Dec. 28, 2013 Common Stock [Member] Maximum [Member]	Dec. 28, 2013 Common Stock [Member] Minimum [Member]	Dec. 28, 2013 Call Option [Member]	Jun. 28, 2014 Call Option [Member]
Stockholders Equity Note [Line Items]
Forward share purchase contract			$ 362,700,000	$ 0	$ 0	$ 0	$ 350,000,000	$ 350,000,000
Payments for Repurchase of Common Stock				0	3,700,000	19,400,000	24,800,000																	80.65	98.80
Long-term debt, including current maturities				4,261,200,000		4,261,200,000			3,889,400,000					345,000,000	632,500,000
Convertible preferred units issued																			6,325,000
Convertible preferred units issued, per share																			$ 100
Stated interest rate																			4.75%
Convertible preferred stock, conversion rate																			1.3333		1.3631		1.2399
Conversion price (in dollars per share)																			$ 75.00		$ 73.36
Debt Instrument, Number of Shares of Convertible Preferred Stock to be Delivered, As a Percentage of Purchase Contracts				85.00%		85.00%
Common stock to be issued up on conversion																			8,433,123	3,500,000.0
Convertible preferred stock, redemption price as a percent of liquidation preference																						100.00%
Convertible preferred stock, liquidation preference per share																						$ 100
Number of common shares purchased under call option											8,433,123															12,200,000.0
Option Indexed to Issuer's Equity, Premium Amount																										73,500,000
Option Indexed to Issuer's Equity, Average Premium Price Per Share																										$ 6.03
Option Indexed to Issuer's Equity, Average Lower Strike Price																										$ 86.07
Option Indexed to Issuer's Equity, Average Upper Strike Price																										$ 106.56
Option Indexed to Issuer's Equity, Aggregate Fair Value				12,500,000		12,500,000																					86,100,000
Call option, aggregate premium	9,700,000										50,300,000
Call option, average price (in dollars per share)											$ 5.97	$ 2.77
Open option contracts written at fair value													102,800,000
Strike price (in dollars per share)																$ 97.95	$ 95.81	$ 75.00
Debt Instrument Convertible Conversion Warrant Strike Price, Percentage Higher than Previous Price on November 1, 2010										60.00%
Equity Forward Contracts, Net Settlement, Shares		5,581,400
Proceeds from Cash Settlements of Equity Forward Contracts		$ 18,800,000