Quarterly report pursuant to Section 13 or 15(d)

Debt (Details) (Narrative)

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Debt (Details) (Narrative) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 29, 2014
Mar. 30, 2013
Debt Instrument [Line Items]    
Loss on debt redemptions $ 15 $ 0
6.75% Senior Notes due 2019
   
Debt Instrument [Line Items]    
Debt instrument, issuance date Feb. 26, 2014  
Debt instrument, face amount 600  
Debt instrument, maturity date Mar. 01, 2019  
Long-term debt, redemption terms At any time (which may be more than once) before March 1, 2017, the Company may redeem up to 35% of the aggregate principal amount of the 6.75% Notes within 90 days of the closing of an equity offering with the net proceeds thereof at a redemption price not greater than 106.75% of the principal amount thereof, together with accrued and unpaid interest to but excluding the date of redemption. At any time (which may be more than once) 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).  
Percentage of repurchase price over to principal amount 101.00%  
6.00% Convertible Senior Notes Due 2015
   
Debt Instrument [Line Items]    
Loss on debt redemptions 10  
Long-term debt, gross 42  
Long-term debt, net of discount 41  
Debt instrument, unamortized discount 1  
Repurchase of 6.00% Notes Pursuant to Tender Offer
   
Debt Instrument [Line Items]    
Debt instrument, increase (decrease), net (423)  
Repayments of debt, including accrued interest 460  
Interest paid 10  
Repurchase of 6.00% Notes in Open Market
   
Debt Instrument [Line Items]    
Debt instrument, increase (decrease), net (64)  
Repayments of debt, including accrued interest 69  
Interest paid 1  
8.125% Senior Notes Due 2017
   
Debt Instrument [Line Items]    
Debt instrument, increase (decrease), net (48)  
Repayments of debt, including accrued interest 51  
Interest paid 1  
Loss on debt redemptions 5  
Long-term debt, gross 452  
Long-term debt, net of discount 427  
Debt instrument, unamortized discount 25  
Revolving Credit Facility
   
Debt Instrument [Line Items]    
Line of credit facility, maximum borrowing capacity $ 500