Receivables (Details) - USD ($) $ in Millions	Mar. 31, 2017	Apr. 01, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, net of allowance for doubtful accounts	$ 1,643	$ 1,831
Billed trade receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, net of allowance for doubtful accounts	732	1,061
Unbilled recoverable amounts under contracts in progress
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, net of allowance for doubtful accounts	402	595
Related party receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, net of allowance for doubtful accounts	0	45
Other receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, net of allowance for doubtful accounts	$ 509	$ 130