Subsidiary Guarantors - Condensed Consolidating Statements of Financial Position (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Current Assets
Cash and cash equivalents	$ 769	$ 1,043	$ 895	$ 1,057
Accounts receivable, net	1,144	1,123
Inventoried costs, net	272	311
Deferred income taxes	167	170
Prepaid expenses and other current assets	28	29
Total current assets	2,380	2,676
Property, plant, and equipment, net	1,852	1,897
Goodwill	1,086	881
Other purchased intangibles	551	528
Pension plan assets	129	124
Miscellaneous other assets	127	119
Total assets	6,125	6,225
Current Liabilities
Trade accounts payable	268	337
Accrued employees' compensation	226	230
Current portion of long-term debt	93	79
Current portion of postretirement plan liabilities	139	139
Current portion of workers' compensation liabilities	233	230
Advance payments and billings in excess of costs incurred	53	115
Other current liabilities	222	262
Total current liabilities	1,234	1,392
Long-term debt	1,650	1,700
Pension plan liabilities	452	529
Other postretirement plan liabilities	486	477
Workers' compensation liabilities	424	419
Deferred tax liabilities	118	83
Other long-term liabilities	99	104
Total liabilities	4,463	4,704
Stockholders' equity	1,662	1,521	935	667
Total liabilities and stockholders' equity	6,125	6,225
Huntington Ingalls Industries, Inc.
Current Assets
Cash and cash equivalents	760	1,042	894	1,056
Total current assets	760	1,042
Miscellaneous other assets	27	35
Investment in subsidiaries	3,630	3,295
Total assets	4,417	4,372
Current Liabilities
Current portion of long-term debt	93	79
Other current liabilities	4	25
Total current liabilities	97	104
Long-term debt	1,545	1,595
Deferred tax liabilities
Intercompany liabilities	1,113	1,152
Total liabilities	2,755	2,851
Stockholders' equity	1,662	1,521
Total liabilities and stockholders' equity	4,417	4,372
Subsidiary Guarantors
Current Assets
Cash and cash equivalents	3
Accounts receivable, net	1,127	1,123
Inventoried costs, net	272	311
Deferred income taxes	167	170
Prepaid expenses and other current assets	28	30
Total current assets	1,597	1,634
Property, plant, and equipment, net	1,850	1,897
Goodwill	1,086	881
Other purchased intangibles	551	528
Pension plan assets	129	124
Miscellaneous other assets	100	84
Intercompany receivables	1,121	1,152
Total assets	6,434	6,300
Current Liabilities
Trade accounts payable	263	337
Accrued employees' compensation	224	230
Current portion of postretirement plan liabilities	139	139
Current portion of workers' compensation liabilities	233	230
Advance payments and billings in excess of costs incurred	53	115
Other current liabilities	218	237
Total current liabilities	1,130	1,288
Long-term debt	105	105
Pension plan liabilities	452	529
Other postretirement plan liabilities	486	477
Workers' compensation liabilities	424	419
Deferred tax liabilities	118	83
Other long-term liabilities	99	104
Total liabilities	2,814	3,005
Stockholders' equity	3,620	3,295
Total liabilities and stockholders' equity	6,434	6,300
Non-Guarantor Subsidiaries
Current Assets
Cash and cash equivalents	6	1	1	1
Accounts receivable, net	17
Prepaid expenses and other current assets	9	5
Total current assets	32	6
Property, plant, and equipment, net	2
Total assets	34	6
Current Liabilities
Trade accounts payable	5
Accrued employees' compensation	2
Other current liabilities	9	6
Total current liabilities	16	6
Deferred tax liabilities
Intercompany liabilities	8
Total liabilities	24	6
Stockholders' equity	10
Total liabilities and stockholders' equity	34	6
Eliminations
Current Assets
Prepaid expenses and other current assets	(9)	(6)
Total current assets	(9)	(6)
Investment in subsidiaries	(3,630)	(3,295)
Intercompany receivables	(1,121)	(1,152)
Total assets	(4,760)	(4,453)
Current Liabilities
Other current liabilities	(9)	(6)
Total current liabilities	(9)	(6)
Deferred tax liabilities
Intercompany liabilities	(1,121)	(1,152)
Total liabilities	(1,130)	(1,158)
Stockholders' equity	(3,630)	(3,295)
Total liabilities and stockholders' equity	$ (4,760)	$ (4,453)