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Employee Equity Incentive Plans (Tables) | 12 Months Ended
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Dec. 27, 2014
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 restricted stock unit awards 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 market-based restricted stock units using a Monte Carlo simulation model on the date of grant. We based the weighted average estimated value of restricted stock unit 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:
|  | 2014 |  | 2013 |  | 2012
Estimated values |  | $ | 25.40 |  |  | $ | 21.45 |  |  | $ | 25.32 |
Risk-free interest rate |  | 0.5 | % |  | 0.2 | % |  | 0.3 | %
Dividend yield |  | 3.3 | % |  | 3.8 | % |  | 3.3 | %
Volatility |  | 23 | % |  | 25 | % |  | 26 | %
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 our equity incentive plans and rights to acquire shares of common stock granted under our stock purchase plan. 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
|  | 2014 |  | 2013 |  | 2012 |  | 2014 |  | 2013 |  | 2012
Estimated values |  | $ | 3.61 |  |  | $ | 3.11 |  |  | $ | 4.22 |  |  | $ | 5.87 |  |  | $ | 4.52 |  |  | $ | 5.47 |
Expected life (in years) |  | 5.1 |  | 5.2 |  | 5.3 |  | 0.5 |  | 0.5 |  | 0.5
Risk-free interest rate |  | 1.7 | % |  | 0.8 | % |  | 1.0 | % |  | 0.1 | % |  | 0.1 | % |  | 0.1 | %
Dividend yield |  | 3.6 | % |  | 3.9 | % |  | 3.3 | % |  | 3.2 | % |  | 4.0 | % |  | 3.3 | %
Volatility |  | 23 | % |  | 25 | % |  | 25 | % |  | 22 | % |  | 22 | % |  | 24 | %
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 31, 2011 |  | 107.0 |  |  | $ | 19.18 |
Granted |  | 49.9 |  |  | $ | 25.32 |
Vested |  | (43.2 | ) |  | $ | 18.88 |
Forfeited |  | (4.4 | ) |  | $ | 20.93 |
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 |
Expected to vest as of December 27, 2014 | 112.1 |  |  | $ | 23.88 |
Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block] | As of December 27, 2014, 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 |  | 54.7 |  |  | $ | 20.29 |  |  | 2.3 |  | $ | 944 |
Expected to vest |  | 21.2 |  |  | $ | 23.74 |  |  | 4.8 |  | $ | 293 |
Total |  | 75.9 |  |  | $ | 21.25 |  |  | 3.0 |  | $ | 1,237 |
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 31, 2011 |  | 298.3 |  |  | $ | 20.12 |
Granted |  | 13.5 |  |  | $ | 27.01 |
Exercised |  | (85.8 | ) |  | $ | 20.45 |
Cancelled and forfeited |  | (3.9 | ) |  | $ | 21.17 |
Expired |  | (19.3 | ) |  | $ | 22.45 |
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 |
Options exercisable as of: |  |  |  |
December 29, 2012 |  | 139.8 |  |  | $ | 19.76 |
December 28, 2013 |  | 111.5 |  |  | $ | 20.25 |
December 27, 2014 |  | 54.7 |  |  | $ | 20.29 |
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] | As of December 27, 2014, outstanding options and exercisable options information, by range of exercises 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 |  |  |  | 0.7 |  |  | 3.0 |  | $ | 11.60 |  |  | 0.7 |  |  | $ | 11.60 |
$ | 15.01 |  | - | $ | 20.00 |  |  |  | 32.9 |  |  | 1.8 |  | $ | 18.27 |  |  | 32.9 |  |  | $ | 18.27 |
$ | 20.01 |  | - | $ | 25.00 |  |  |  | 34.0 |  |  | 3.9 |  | $ | 22.75 |  |  | 17.2 |  |  | $ | 22.89 |
$ | 25.01 |  | - | $ | 27.42 |  |  |  | 9.7 |  |  | 4.3 |  | $ | 27.11 |  |  | 3.9 |  |  | $ | 27.21 |
Total |  |  |  |  | 77.3 |  |  | 3.0 |  | $ | 21.30 |  |  | 54.7 |  |  | $ | 20.29 |

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- Definition Tabular disclosure of the following for fully vested share options (or share units) and share options expected to vest at the date of the latest statement of financial position: the number, weighted-average exercise price (or conversion ratio), aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term of options (or share units) outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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