Consolidated Statement of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities - continuing operations:
Net earnings		$ 3,484	$ 3,345	$ 2,912
Adjustments to reconcile net earnings to net cash from operating activities:
Depreciation of property, plant and equipment		466	436	362
Amortization of intangible and finance lease right-of-use assets		363	327	79
Equity-based compensation expense		133	140	123
Deferred income tax (benefit) provision		92	(3)	401
Discontinued operations, net of tax		0	13	0
(Increase) decrease in assets, net of effects of business acquisitions:
Accounts receivable		176	417	(195)
Unbilled receivables		(1,303)	(800)	(987)
Inventories		(376)	(591)	(182)
Other current assets		8	310	207
Increase (decrease) in liabilities, net of effects of business acquisitions:
Accounts payable		6	(197)	657
Customer advances and deposits		(105)	36	264
Other, net		37	(285)	235
Net cash provided by operating activities	[1]	2,981	3,148	3,876
Cash flows from investing activities:
Capital expenditures		(987)	(690)	(428)
Business acquisitions, net of cash acquired		(19)	(10,099)	(399)
Proceeds from sales of assets		14	562	50
Other, net		(2)	(7)	(11)
Net cash used by investing activities		(994)	(10,234)	(788)
Cash flows from financing activities:
Dividends paid		(1,152)	(1,075)	(986)
(Repayments of) proceeds from commercial paper, net		(850)	850	0
Purchases of common stock		(231)	(1,769)	(1,558)
Proceeds from notes		0	6,461	985
Repayment of CSRA accounts receivable purchase agreement		0	(450)	0
Repayment of fixed-rate notes		0	0	(900)
Other, net		236	69	60
Net cash (used) provided by financing activities		(1,997)	5,086	(2,399)
Net cash used by discontinued operations		(51)	(20)	(40)
Net (decrease) increase in cash and equivalents		(61)	(2,020)	649
Cash and equivalents at beginning of year		963	2,983	2,334
Cash and equivalents at end of year		902	963	2,983
LIBOR
Cash flows from financing activities:
Proceeds from notes		$ 0	$ 1,000	$ 0

[1] * Continuing operations only.