Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details) (Summary of Tax Attribute Carryforwards)

v3.3.1.900
Income Taxes (Details) (Summary of Tax Attribute Carryforwards)
$ in Millions
 12 Months Ended
Dec. 26, 2015
USD ($)
US-net operating loss carryovers | Federal  
Tax Attribute Carryforwards [Line Items]  
Operating loss carryforwards, amount $ 6,478
Operating loss carryforwards, limitations on use Utilization of $12 million of the Company’s U.S. federal net operating loss carryforwards are subject to annual limitations
US-net operating loss carryovers | State/Provincial  
Tax Attribute Carryforwards [Line Items]  
Operating loss carryforwards, amount $ 335
US-net operating loss carryovers | From  
Tax Attribute Carryforwards [Line Items]  
Operating loss carryforwards, expiration dates Jan. 01, 2016
US-net operating loss carryovers | To  
Tax Attribute Carryforwards [Line Items]  
Operating loss carryforwards, expiration dates Dec. 31, 2035
US-credit carryovers | Federal  
Tax Attribute Carryforwards [Line Items]  
Tax credit carryforward, amount $ 401
US-credit carryovers | State/Provincial  
Tax Attribute Carryforwards [Line Items]  
Tax credit carryforward, amount $ 204
US-credit carryovers | From  
Tax Attribute Carryforwards [Line Items]  
Tax credit carryforward, expiration date Jan. 01, 2016
US-credit carryovers | To  
Tax Attribute Carryforwards [Line Items]  
Tax credit carryforward, expiration date Dec. 31, 2035
Canada-net operating loss carryovers | Federal  
Tax Attribute Carryforwards [Line Items]  
Operating loss carryforwards, amount $ 173
Canada-net operating loss carryovers | State/Provincial  
Tax Attribute Carryforwards [Line Items]  
Operating loss carryforwards, amount $ 173
Canada-net operating loss carryovers | From  
Tax Attribute Carryforwards [Line Items]  
Operating loss carryforwards, expiration dates Jan. 01, 2027
Canada-net operating loss carryovers | To  
Tax Attribute Carryforwards [Line Items]  
Operating loss carryforwards, expiration dates Dec. 31, 2028
Canada-credit carryovers | Federal  
Tax Attribute Carryforwards [Line Items]  
Tax credit carryforward, amount $ 302
Canada-credit carryovers | State/Provincial  
Tax Attribute Carryforwards [Line Items]  
Tax credit carryforward, amount $ 32
Canada-credit carryovers | From  
Tax Attribute Carryforwards [Line Items]  
Tax credit carryforward, expiration date Jan. 01, 2021
Canada-credit carryovers | To  
Tax Attribute Carryforwards [Line Items]  
Tax credit carryforward, expiration date Dec. 31, 2035
Canada-R&D pools | Federal  
Tax Attribute Carryforwards [Line Items]  
Tax credit carryforward, amount $ 225
Canada-R&D pools | State/Provincial  
Tax Attribute Carryforwards [Line Items]  
Tax credit carryforward, amount 225
Barbados-net operating loss carryovers | Federal  
Tax Attribute Carryforwards [Line Items]  
Operating loss carryforwards, amount $ 143
Barbados-net operating loss carryovers | From  
Tax Attribute Carryforwards [Line Items]  
Operating loss carryforwards, expiration dates Jan. 01, 2016
Barbados-net operating loss carryovers | To  
Tax Attribute Carryforwards [Line Items]  
Operating loss carryforwards, expiration dates Dec. 31, 2017
Other foreign net operating loss carryovers | Federal  
Tax Attribute Carryforwards [Line Items]  
Operating loss carryforwards, amount $ 19