Fair Value Measurements (Tables)

12 Months Ended

Dec. 26, 2014

Fair Value Disclosures [Abstract]

Schedule of fair value of investment assets

The Company's investment assets are carried at fair value on the consolidated balance sheets as summarized in the table below. Additionally, the amortized cost basis of these investments was $453 million and $668 million as of December 26, 2014 and December 27, 2013, respectively.

	Fiscal Years
	2014								2013
(Dollars in Millions)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Certificates of Deposit and Commercial Paper	$	—	$	250	$	—	$	250	$	—	$	472	$	—	$	472
Corporate Bonds	—		141		—		141		—		132		—		132
Government Securities	—		51		—		51		—		49		—		49
Auction Rate Securities	—		—		11		11		—		—		15		15
Total investments at fair value	$	—	$	442	$	11	$	453	$	—	$	653	$	15	$	668

Schedule of investment maturities

These investments have the following maturities and are represented on the consolidated balance sheet within short-term investments for investments with maturities within one year or less, and other long-term assets for investments with maturities greater than one year:

(Dollars in Millions)	December 2014		December 2013
Less than 1 year	$	292	$	487
1 - 2 years	45		58
2 - 5 years	100		105
Greater than 5 years	16		18
Total investments at fair value	$	453	$	668

Schedule of fair value and carrying value of long-term debt

The fair value and carrying value of the Company's long-term debt is as follows:

(Dollars in Millions)	December 2014		December 2013
Long-term Debt (Including Current Maturities):
Fair Value	$	11,042	$	10,354
Carrying Value	9,742		9,555

Schedule of pension plan assets at fair value by level

The pension plan assets at fair value by level, within the fair value hierarchy, as of calendar plan years 2014 and 2013 are shown in the table below. For additional information related to pension assets, see Note 8, Employee Benefit Plans.

	Fiscal Years
	2014								2013
(Dollars in Millions)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Common Stock:
Information technology	$	177	$	—	$	—	$	177	$	173	$	—	$	—	$	173
Health care	133		—		—		133		126		—		—		126
Consumer discretionary	125		—		—		125		152		—		—		152
Financials	116		—		—		116		116		—		—		116
Industrials	90		—		—		90		108		—		—		108
Energy	51		—		—		51		59		—		—		59
Consumer staples	42		—		—		42		43		—		—		43
Materials	20		—		—		20		29		—		—		29
Other	33		—		—		33		31		—		—		31
Mutual funds	20		—		—		20		17		—		—		17
Cash equivalents	1		—		—		1		—		—		—		—
Common trust funds	—		611		—		611		—		553		—		553
Corporate bonds	—		539		—		539		—		568		—		568
Partnerships	—		365		—		365		—		314		—		314
Government securities	—		164		—		164		—		186		—		186
Asset-backed securities	—		15		—		15		—		24		—		24
Derivatives and other	—		2		—		2		—		1		—		1
Total investments at     fair value	$	808	$	1,696	$	—	$	2,504	$	854	$	1,646	$	—	$	2,500