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Receivables (Details) $ in Millions	11 Months Ended		12 Months Ended
Receivables (Details) $ in Millions	Jan. 01, 2016 USD ($)	Jan. 02, 2015 USD ($)	Jan. 30, 2015 USD ($) project	Jan. 31, 2014 USD ($) project
Accounts, Notes, Loans and Financing Receivable [Line Items]
Billed Contracts Receivable	$ 715		$ 655
Unbilled Contracts Receivable	187		230
Accounts receivable, gross	29		21
Allowance for doubtful accounts	(10)		(10)
Accounts receivable, net	921		896
Bad debt expense	8	$ 4	5	$ 44
One Customer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net, noncurrent			18
Allowance for doubtful accounts			$ 7
Number of projects \| project			1
Bad debt expense	11
Proceeds from sale of receivables	$ 6		$ 21
Two Customers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of projects \| project				2
Bad debt expense				$ 41