Summary Of Quarterly Information (Parenthetical) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			12 Months Ended					3 Months Ended	12 Months Ended					3 Months Ended		12 Months Ended
	Dec. 31, 2011	Jun. 26, 2011	Mar. 28, 2010	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009	Sep. 26, 2010 Voluntary Executive Separation Program [Member]	Dec. 31, 2010 Voluntary Executive Separation Program [Member]	Sep. 25, 2011 Savi Technology, Inc. [Member]	Dec. 31, 2011 Pacific Architects And Engineers, Inc. [Member]	Dec. 31, 2010 Pacific Architects And Engineers, Inc. [Member]	Jun. 27, 2010 Pacific Architects And Engineers, Inc. [Member]	Dec. 31, 2010 Enterprise Integration Group (EIG) [Member]	Dec. 31, 2010 Electronic Systems [Member]	Dec. 31, 2010 Electronic Systems [Member]	Dec. 31, 2010 Electronic Systems [Member] Voluntary Executive Separation Program [Member]
Segment Reporting Information [Line Items]
Reduction in income tax expense due to IRS examinations		$ 89		$ 89		$ 10		$ 69
Reduction in net earnings due to severance and other charges		63		88					116	116						27	27
Severance and other charges		97		136	[1]	220	[1]		178	178						42	42	38
Increase in non-cash FAS/CAS pension expense adjustment	107
Increase in non-cash FAS/CAS pension expense adjustment, after tax	66
Decrease in R&D tax credits	36			35		43		43
Premiums paid in connection with early extinguishments of debt	46			48
After tax impact of charge in connection with early extinguishments of debt	28
Increase in tax expense related to Medicare Part D reimbursement			96			96
Deferred tax asset											66	15	182	96
Gain on sale of EIG						$ 184									$ 184

[1] Severance and other charges include the severance charges recorded in 2011 associated with Aeronautics, IS&GS, and Space Systems business segments, and Corporate Headquarters, and for 2010, included the charges related to the VESP and facilities consolidation within Electronic Systems (Note 2).