Stock-Based Awards - Class A Common Stock Reserved for Issuance (Details) (Class A Common Stock) In Thousands, unless otherwise specified	Dec. 28, 2014		Dec. 29, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, outstanding	12,055		12,873
Shares, available for issuance	17,863		12,616
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, available for issuance	6,410	[1]	6,410	[1]
Stock Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, available for issuance	8,408		3,161
Stock Options and Stock-Settled Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, outstanding	9,228		10,965
Stock-Settled Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, outstanding	2,827	[2]	1,908	[2]
401(k) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, available for issuance	3,045	[3]	3,045	[3]

[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 would 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.