ACCOUNTS RECEIVABLE AND COSTS AND ACCRUED EARNINGS IN EXCESS OF BILLINGS ON CONTRACTS (DETAILS) (USD $) In Millions, unless otherwise specified	Jul. 04, 2014	Jan. 03, 2014
Schedule of accounts receivable and costs and accrued earnings in excess of billings on contracts [Line Items]
Total accounts receivable	$ 1,374	$ 1,393
Unbilled Accounts Receivable including amounts in Other long-term assets	1,683	1,652
Less: Amounts included in Other long-term assets	(146)	(131)
Unbilled Accounts Receivable	1,537	1,521
Schedule of Unbilled Accounts Receivable [Abstract]
Balances	1,683	1,652
Balances	1,683	1,652
Amounts included in "Other long-term assets" [Member]
Schedule of accounts receivable and costs and accrued earnings in excess of billings on contracts [Line Items]
Total accounts receivable		1,393
Unbilled Accounts Receivable including amounts in Other long-term assets		1,652
Less: Amounts included in Other long-term assets		(131)
Unbilled Accounts Receivable		1,521
Schedule of Unbilled Accounts Receivable [Abstract]
Balances		1,652
Balances		1,652
US Federal Government [Member]
Schedule of accounts receivable and costs and accrued earnings in excess of billings on contracts [Line Items]
Total accounts receivable	358	353
Unbilled Accounts Receivable including amounts in Other long-term assets	817	856
Schedule of Unbilled Accounts Receivable [Abstract]
Balances	817	856
Balances	817	856
US Federal Government [Member] | Amounts included in "Other long-term assets" [Member]
Schedule of accounts receivable and costs and accrued earnings in excess of billings on contracts [Line Items]
Total accounts receivable		353
Unbilled Accounts Receivable including amounts in Other long-term assets		856
Schedule of Unbilled Accounts Receivable [Abstract]
Balances		856
Balances		856
Others [Member]
Schedule of accounts receivable and costs and accrued earnings in excess of billings on contracts [Line Items]
Total accounts receivable	1,016	1,040
Unbilled Accounts Receivable including amounts in Other long-term assets	866	796
Schedule of Unbilled Accounts Receivable [Abstract]
Balances	866	796
Balances	866	796
Others [Member] | Amounts included in "Other long-term assets" [Member]
Schedule of accounts receivable and costs and accrued earnings in excess of billings on contracts [Line Items]
Total accounts receivable		1,040
Unbilled Accounts Receivable including amounts in Other long-term assets		796
Schedule of Unbilled Accounts Receivable [Abstract]
Balances		796
Balances		796
DOE Deactivation, Demolition and Removal Project [Member]
Loss Contingencies [Line Items]
Accounts receivable	$ 99	$ 82