Employee Equity Incentive Plans (Tables)

12 Months Ended

Dec. 26, 2015

Employee Benefits and Share-based Compensation [Abstract]

Restricted Stock Units Estimated Values And Weighted Average Assumptions [Table Text Block]

We estimate the fair value of RSUs with time-based vesting using the value of our common stock on the date of grant, reduced by the present value of dividends expected to be paid on our shares of common stock prior to vesting. We estimate the fair value of OSUs using a Monte Carlo simulation model on the date of grant. We based the weighted average estimated value of RSU grants, as well as the weighted average assumptions that we used in calculating the fair value, on estimates at the date of grant, for each period as follows:

	Dec 26, 2015			Dec 27, 2014			Dec 28, 2013
Estimated values	$	31.63		$	25.40		$	21.45
Risk-free interest rate	0.6		%	0.5		%	0.2		%
Dividend yield	2.9		%	3.3		%	3.8		%
Volatility	27		%	23		%	25		%

Stock Options And Stock Purchase Plan Estimated Values And Weighted Average Assumptions [Table Text Block]

We use the Black-Scholes option pricing model to estimate the fair value of options granted under the 2006 Plan and rights to acquire shares of common stock granted under the 2006 Stock Purchase Plan. No options were granted in 2015. We based the weighted average estimated value of employee stock option grants and rights granted under the stock purchase plan, as well as the weighted average assumptions used in calculating the fair value, on estimates at the date of grant, for each period as follows:

	Stock Options							Stock Purchase Plan
	Dec 26, 2015	Dec 27, 2014			Dec 28, 2013			Dec 26, 2015			Dec 27, 2014			Dec 28, 2013
Estimated values	n/a	$	3.61		$	3.11		$	6.56		$	5.87		$	4.52
Expected life (in years)	n/a	5.1			5.2			0.5			0.5			0.5
Risk-free interest rate	n/a	1.7		%	0.8		%	0.1		%	0.1		%	0.1		%
Dividend yield	n/a	3.6		%	3.9		%	3.1		%	3.2		%	4.0		%
Volatility	n/a	23		%	25		%	25		%	22		%	22		%

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

Restricted stock unit activity for each period was as follows:

	Number of RSUs (In Millions)		Weighted Average Grant-Date Fair Value
December 29, 2012	109.3		$	22.03
Granted	53.4		$	21.45
Vested	(44.5	)	$	20.21
Forfeited	(4.9	)	$	22.06
December 28, 2013	113.3		$	22.47
Granted	57.2		$	25.40
Vested	(42.5	)	$	22.33
Forfeited	(8.6	)	$	22.94
December 27, 2014	119.4		$	23.89
Granted	42.4		$	31.63
Vested	(46.6	)	$	23.61
Forfeited	(7.8	)	$	25.76
December 26, 2015	107.4		$	26.93
Expected to vest as of December 26, 2015	102.5		$	26.93

Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block]

As of December 26, 2015, options outstanding that have vested and are expected to vest were as follows:

	Number of Options (In Millions)	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (In Years)	Aggregate Intrinsic Value (In Millions)
Vested	43.8	$	21.07	1.8	$	609
Expected to vest	9.6	$	24.07	4.1	$	104
Total	53.4	$	21.61	2.2	$	713

Schedule of Stock Options Roll Forward [Table Text Block]

Stock option activity for each period was as follows:

	Number of Options (In Millions)		Weighted Average Exercise Price
December 29, 2012	202.8		$	20.20
Granted	20.1		$	22.99
Exercised	(65.0	)	$	18.76
Cancelled and forfeited	(3.0	)	$	22.58
Expired	(1.9	)	$	22.56
December 28, 2013	153.0		$	21.10
Granted	0.6		$	25.34
Exercised	(63.7	)	$	19.87
Cancelled and forfeited	(2.7	)	$	23.70
Expired	(9.9	)	$	27.00
December 27, 2014	77.3		$	21.30
Granted	—		$	—
Exercised	(21.9	)	$	20.34
Cancelled and forfeited	(1.1	)	$	23.23
Expired	(0.1	)	$	20.87
December 26, 2015	54.2		$	21.65
Options exercisable as of:
December 28, 2013	111.5		$	20.25
December 27, 2014	54.7		$	20.29
December 26, 2015	43.8		$	21.07

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

As of December 26, 2015, outstanding options and exercisable options information, by range of exercise prices, was as follows:

					Outstanding Options				Exercisable Options
Range of Exercise Prices					Number of Shares (In Millions)	Weighted Average Remaining Contractual Life (In Years)	Weighted Average Exercise Price		Number of Shares (In Millions)	Weighted Average Exercise Price
$	1.82	-	$	15.00	0.4	2.9	$	11.70	0.4	$	11.70
$	15.01	-	$	20.00	21.7	0.8	$	18.48	21.7	$	18.48
$	20.01	-	$	25.00	24.7	3.1	$	22.92	16.9	$	22.86
$	25.01	-	$	27.42	7.4	3.3	$	27.15	4.8	$	27.23
Total					54.2	2.2	$	21.65	43.8	$	21.07