Debt and Other Obligations (Details) (Narrative) (USD $)	12 Months Ended					9 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Dec. 27, 2008	Sep. 27, 2014	Mar. 28, 2009
Debt Instrument [Line Items]
Gain (loss) on debt redemptions	$ (61,000,000)	$ (1,000,000)	$ 0
Long-term debt, gross	2,025,000,000
Letters of credit, outstanding balance	6,000,000
Secured revolving line of credit, outstanding balance	130,000,000	55,000,000
Capital lease obligations	12,000,000	16,000,000
Capital leased assets, gross	23,000,000	23,000,000
Capital leased assets, accumulated depreciation	(18,000,000)	(16,000,000)
Secured Revolving Line of Credit
Debt Instrument [Line Items]
Secured revolving line of credit, maximum borrowing capacity	500,000,000
Letters of credit, maximum borrowing capacity	75,000,000
Secured revolving line of credit, borrowing base description	Borrowings under the Secured Revolving Line of Credit are limited to up to 85% of eligible account receivable minus certain reserves.
Secured revolving line of credit, interest rate description	per annum equal to (a) London Interbank Offered Rate (LIBOR) plus an applicable margin ranging from 2.00% to 2.75%, or (b) (i) the greater of (x) the Agent’s prime rate, (y) the federal funds rate as published by the Federal Reserve Bank of New York plus 0.50%, and (z) LIBOR for a one-month period plus 1.00%, plus (ii) an applicable margin ranging from 1.00% to 1.75%.
Secured revolving line of credit, outstanding balance	130,000,000
Secured revolving line of credit, interest rate at period end	4.25%
Secured revolving line of credit, remaining borrowing capacity	364,000,000
6.00% Convertible Senior Notes Due 2015
Debt Instrument [Line Items]
Principal amount, at time of issuance	2,200,000,000
Issuance date	Apr. 27, 2007
Maturity date	May 01, 2015
Extinguishment of Debt, Amount		50,000,000		1,600,000,000
Repayments of debt		53,000,000			1,400,000,000
Gain (loss) on debt redemptions	(10,000,000)
Repayments of debt, convertible, allocation to equity component		3,000,000
Carrying amount of equity component	125,000,000	159,000,000					259,000,000
Long-term debt, gross	42,000,000	530,000,000
Debt discount	0	(13,000,000)
Long-term debt, net of discount	42,000,000	517,000,000
Convertible debt, conversion ratio, number of shares	35.6125
Convertible debt, conversion ratio, denomination value	1,000
Convertible debt, conversion price per share	$ 28.08
Convertible debt, terms of conversion feature	This initial conversion price represents a premium of 100% relative to the last reported sale price of the Company’s common stock on April 23, 2007 (the trading date preceding the date of pricing of the 6.00% Notes) of $14.04 per share.
6.00% Convertible Senior Notes Due 2015 | Repurchase in Open Market
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	64,000,000
Repayments of Debt, including Accrued Interest	69,000,000
Interest Paid	1,000,000
6.00% Convertible Senior Notes Due 2015 | Repurchase Pursuant To Tender Offer
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	423,000,000
Repayments of Debt, including Accrued Interest	460,000,000
Interest Paid	10,000,000
8.125% Senior Notes Due 2017
Debt Instrument [Line Items]
Principal amount, at time of issuance	500,000,000
Issuance date	Nov. 30, 2009
Extinguishment of Debt, Amount	500,000,000
Repayments of Debt, including Accrued Interest	531,000,000
Gain (loss) on debt redemptions	(54,000,000)
Long-term debt, gross	0
Long-term debt, net of discount	0	470,000,000
Interest Paid	8,000,000
6.75% Senior Notes due 2019
Debt Instrument [Line Items]
Principal amount, at time of issuance	600,000,000
Issuance date	Feb. 26, 2014
Maturity date	Mar. 01, 2019
Debt Instrument, Redemption Price, Percentage	101.00%
Long-term debt, net of discount	600,000,000
Long-term debt, redemption terms	At any time before March 1, 2019, the Company may redeem some or all of the 6.75% Notes at a price equal to 100% of the principal amount, plus accrued and unpaid interest and a “make whole” premium (as set forth in the 6.75% Indenture).
7.75% Senior Notes Due 2020
Debt Instrument [Line Items]
Principal amount, at time of issuance	500,000,000
Issuance date	Aug. 04, 2010
Maturity date	Aug. 01, 2020
Extinguishment of Debt, Amount	50,000,000
Repayments of Debt, including Accrued Interest	49,000,000
Gain (loss) on debt redemptions	2,000,000
Long-term debt, net of discount	450,000,000	500,000,000
Long-term debt, redemption terms	Prior to August 1, 2015, the Company may redeem some or all of the 7.75% Notes at a price equal to 100% of the principal amount, plus accrued and unpaid interest and a “make whole” premium (as defined in the 7.75% Indenture). From August 1, 2015, the Company may redeem the 7.75% Notes at specified redemption prices, plus accrued and unpaid interest.
Percentage of repurchase price over to principal amount	101.00%
Interest Paid	1,000,000
7.50% Senior Notes due 2022
Debt Instrument [Line Items]
Principal amount, at time of issuance	500,000,000
Issuance date	Aug. 15, 2012
Maturity date	Aug. 15, 2022
Extinguishment of Debt, Amount	25,000,000
Repayments of Debt, including Accrued Interest	24,000,000
Gain (loss) on debt redemptions	1,000,000
Long-term debt, net of discount	475,000,000	500,000,000
Long-term debt, redemption terms	At any time (which may be more than once) before August 15, 2015, the Company can redeem up to 35% of the aggregate principal amount of the 7.50% Notes within 90 days of the closing of an equity offering with the net proceeds thereof at a redemption price not greater than 107.5% of the principal amount thereof, together with accrued and unpaid interest to but excluding the date of redemption. Prior to August 15, 2022, the Company may redeem some or all of the 7.50% Notes at a price equal to 100% of the principal amount, plus accrued and unpaid interest and a “make whole” premium (as defined in the 7.50% Indenture).
Percentage of repurchase price over to principal amount	101.00%
7.00% Senior Notes due 2024
Debt Instrument [Line Items]
Principal amount, at time of issuance						500,000,000
Issuance date						Jun. 16, 2014
Maturity date						Jul. 01, 2024
Debt Instrument, Redemption Price, Percentage	101.00%
Long-term debt, net of discount	$ 500,000,000
Long-term debt, redemption terms	At any time before July 1, 2017, the Company may redeem up to 35% of the aggregate principal amount of the 7.00% Notes within 90 days of the closing of an equity offering with the net proceeds thereof at a redemption price equal to 107.000% of the principal amount thereof, together with accrued and unpaid interest to but excluding the date of redemption. Prior to July 1, 2019, the Company may redeem some or all of the 7.00% Notes at a price equal to 100% of the principal amount, plus accrued and unpaid interest and a “make whole” premium (as set forth in the 7.00% Indenture).