Stock-Based Awards - Class A Common Stock Reserved for Issuance (Details) - Class A Common Stock - shares shares in Thousands		Dec. 25, 2016	Dec. 27, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, outstanding		8,747	11,080
Shares, available for issuance		16,369	16,737
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, available for issuance	[1]	6,410	6,410
Incentive Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, available for issuance		6,914	7,282
Stock Options and Stock-Settled Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, outstanding		5,588	7,549
Stock-Settled Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, outstanding	[2]	3,159	3,531
401(k) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, available for issuance	[3]	3,045	3,045

[1] We have not had an offering under the Employee Stock Purchase Plan since 2010.

[2] The number of shares actually earned at the end of the multi-year performance period will vary, based on actual performance, from 0% to 200% of the target number of performance awards granted. The maximum number of shares that could be issued is included in the table above.

[3] Effective 2014, we no longer offer a Company stock match under the Company’s 401(k) plan.