OTHER - Changes in Estimates and Backlog (Details) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		12 Months Ended
	Feb. 29, 2020 satellite	Mar. 29, 2020 USD ($) satellite program $ / shares	Mar. 31, 2019 USD ($) $ / shares	Dec. 31, 2019 satellite
Change in Accounting Estimate [Line Items]
Performance obligation satisfied in previous period		$ 530	$ 670
Number of satellites launched or to be launched | satellite	1	3		2
EADGE-T
Change in Accounting Estimate [Line Items]
Cumulative losses on development		$ 260
Ground Based Radar
Change in Accounting Estimate [Line Items]
Cumulative losses on development		225
LM 2100 Project
Change in Accounting Estimate [Line Items]
Cumulative losses on development		410
Warrior Capability Sustainment Program
Change in Accounting Estimate [Line Items]
Cumulative losses on development		140
Contracts Accounted for under Percentage of Completion
Change in Accounting Estimate [Line Items]
Increase in operating profit due to profit rate adjustments		465	565
Increase in net earnings due to profit rate adjustments		$ 367	$ 446
Increase in diluted earnings per common share due to profit rate adjustments (in dollars per share) | $ / shares		$ 1.30	$ 1.57
Space
Change in Accounting Estimate [Line Items]
Number of commercial satellite programs with performance issues | program		2