Debt Additional Information (Details) £ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2015 USD ($)	Sep. 28, 2014 USD ($)	Sep. 27, 2015 USD ($)	Sep. 27, 2015 GBP (£)	Sep. 28, 2014 USD ($)	Dec. 28, 2014 USD ($)
Debt Instrument [Line Items]
Total long-term debt, excluding current portion	$ 25,324,000,000		$ 25,324,000,000			$ 13,400,000,000
Gains (Losses) on Extinguishment of Debt			(341,000,000)
Write-off of Debt Issuance Costs			236,000,000
Aggregate Principal Amount of Previously Issued Debt that Parent Became Guarantor of During the Period			$ 1,719,000,000
Percentage of Subsidiary Owned by Parent			100.00%	100.00%
Unamortized Debt Issuance Costs	88,000,000		$ 88,000,000
Amortization of Financing Costs	2,000,000	$ 12,000,000	24,000,000		$ 37,000,000
Debt Instrument, Unamortized Discount (Premium), Net	(720,000,000)		(720,000,000)
Amortization of Debt Discount (Premium)	(21,000,000)	$ (1,000,000)	$ (24,000,000)		$ (3,000,000)
Line of Credit Facility, Initiation Date			Jul. 06, 2015	Jul. 06, 2015
Line of Credit Facility, Maximum Borrowing Capacity	4,000,000,000		$ 4,000,000,000
Line of Credit Facility, Expiration Date			Jul. 06, 2020	Jul. 06, 2020
Revolving Credit Facility Sub-Limit for Borrowings in Canadian Dollars, Euro or Sterling	1,000,000,000		$ 1,000,000,000
Revolving Credit Facility Letter of Credit Sub-Facility Maximum Borrowing Capacity	150,000,000		150,000,000
Maximum Possible Increase in the Amount of Revolving Commitments and/or Term Loans	1,000,000,000		1,000,000,000
Proceeds from Lines of Credit			0
Long-term Debt, Fair Value	$ 26,100,000,000		$ 26,100,000,000
Two Point Zero Zero Zero Percent U.S. Dollar Notes Due 2016
Debt Instrument [Line Items]
Stated Interest Rate Percentage on Previously Issued Debt that Parent Became Guarantor of During the Period	2.00%		2.00%
Maturity Year for Previously Issued Debt that Parent Became Guarantor of During the Period			2016	2016
One Point Five Zero Zero Percent U.S. Dollar Notes Due 2017
Debt Instrument [Line Items]
Stated Interest Rate Percentage on Previously Issued Debt that Parent Became Guarantor of During the Period	1.50%		1.50%
Maturity Year for Previously Issued Debt that Parent Became Guarantor of During the Period			2017	2017
Three Point One Two Five Percent U.S. Dollar Notes Due 2021
Debt Instrument [Line Items]
Stated Interest Rate Percentage on Previously Issued Debt that Parent Became Guarantor of During the Period	3.125%		3.125%
Maturity Year for Previously Issued Debt that Parent Became Guarantor of During the Period			2021	2021
Two Point Eight Five Zero Percent U.S. Dollar Notes Due 2022
Debt Instrument [Line Items]
Stated Interest Rate Percentage on Previously Issued Debt that Parent Became Guarantor of During the Period	2.85%		2.85%
Maturity Year for Previously Issued Debt that Parent Became Guarantor of During the Period			2022	2022
Six Point Three Seven Five Percent Debentures Due 2028
Debt Instrument [Line Items]
Stated Interest Rate Percentage on Previously Issued Debt that Parent Became Guarantor of During the Period	6.375%		6.375%
Maturity Year for Previously Issued Debt that Parent Became Guarantor of During the Period			2028	2028
Six Point Seven Five Zero Percent Debentures Due 2032
Debt Instrument [Line Items]
Stated Interest Rate Percentage on Previously Issued Debt that Parent Became Guarantor of During the Period	6.75%		6.75%
Maturity Year for Previously Issued Debt that Parent Became Guarantor of During the Period			2032	2032
Seven Point One Two Five Percent Debentures Due 2039
Debt Instrument [Line Items]
Stated Interest Rate Percentage on Previously Issued Debt that Parent Became Guarantor of During the Period	7.125%		7.125%
Maturity Year for Previously Issued Debt that Parent Became Guarantor of During the Period			2039	2039
Six Point Two Five Zero Percent Pound Sterling Notes Due 2030
Debt Instrument [Line Items]
Aggregate Principal Amount of Previously Issued Debt that Parent Became Guarantor of During the Period | £				£ 125
Stated Interest Rate Percentage on Previously Issued Debt that Parent Became Guarantor of During the Period	6.25%		6.25%
Maturity Year for Previously Issued Debt that Parent Became Guarantor of During the Period			2030	2030
Four Point Two Five Zero Percent Second Lien Senior Secured Notes due 2020
Debt Instrument [Line Items]
Call Premiums			$ 66,000,000
Four Point Eight Seven Five Percent Second Lien Senior Secured Notes Due February 15, 2025
Debt Instrument [Line Items]
Call Premiums			39,000,000
Aggregate Principal Amount of Debt Issued or Assumed During the Period			$ 2,000,000,000
Debt Instrument, Maturity Date			Feb. 15, 2025	Feb. 15, 2025
Debt Instrument, Face Amount	$ 2,000,000,000		$ 2,000,000,000
Senior Unsecured Term Loan Facility Floating Rate (LIBOR plus 1.250 percent) due July 6, 2020
Debt Instrument [Line Items]
Aggregate Principal Amount of Debt Issued or Assumed During the Period			$ 600,000,000
Debt Instrument, Maturity Date			Jul. 06, 2020	Jul. 06, 2020
Debt Instrument, Face Amount	$ 600,000,000		$ 600,000,000