Receivables (Details) - USD ($)	Mar. 30, 2018	Jun. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, gross	$ 747,000,000	$ 626,000,000
Less allowances for collection losses	(4,000,000)	(3,000,000)
Receivables, net	743,000,000	623,000,000
Trade Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, gross	463,000,000	368,000,000
Cost-Plus | Unbilled Revenues
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, gross	284,000,000	$ 258,000,000
RSA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Authorized amount of accounts receivables outstanding under agreement	$ 50,000,000