Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Consolidated Statements of Comprehensive Income
Net income	$ 600us-gaap_NetIncomeLoss	$ 498us-gaap_NetIncomeLoss	$ 589us-gaap_NetIncomeLoss
Other comprehensive income (loss), net of tax
Pension and postretirement benefits adjustments, net of reclassifications	(401)	747	(146)
Foreign currency translation adjustments	(75)	12	2
Deferred gains/losses on hedge contracts, net of reclassifications	(3)	(16)	(1)
Other comprehensive income (loss)	(479)	743	(145)
Comprehensive income	$ 121us-gaap_ComprehensiveIncomeNetOfTax	$ 1,241us-gaap_ComprehensiveIncomeNetOfTax	$ 444us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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