Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Cash flows from operating activities - continuing operations:
Net earnings	$ 3,167	$ 3,484	[1]	$ 3,345	[1]
Adjustments to reconcile net earnings to net cash from operating activities:
Depreciation of property, plant and equipment	523	466		436
Amortization of intangible and finance lease right-of-use assets	355	363		327
Equity-based compensation expense	128	133		140
Deferred income tax (benefit) provision	(127)	92		(3)
Discontinued operations, net of tax	0	0		13
(Increase) decrease in assets, net of effects of business acquisitions:
Accounts receivable	371	176		417
Unbilled receivables	(116)	(1,303)		(800)
Inventories	502	(376)		(591)
Other current assets	208	8		310
Increase (decrease) in liabilities, net of effects of business acquisitions:
Accounts payable	(215)	6		(197)
Customer advances and deposits	(707)	(105)		36
Other, net	(231)	37		(285)
Net cash provided by operating activities	3,858	2,981		3,148
Cash flows from investing activities:
Capital expenditures	(967)	(987)		(690)
Business acquisitions, net of cash acquired	(203)	(19)		(10,099)
Proceeds from sales of assets	171	14		562
Other, net	25	(2)		(7)
Net cash used by investing activities	(974)	(994)		(10,234)
Cash flows from financing activities:
Proceeds from notes	3,960	0		6,461
Repayments of notes	(2,000)	0		0
Proceeds from (Repayments of) Lines of Credit	(441)	291		122
Dividends paid	(1,240)	(1,152)		(1,075)
Purchases of common stock	(587)	(231)		(1,769)
Proceeds from commercial paper, gross (maturities greater than 3 months)	420	0		0
Repayment of commercial paper, gross (maturities greater than 3 months)	(420)	0		0
Repayment of fixed-rate notes	0	(850)		850
(Repayment of) proceeds from commercial paper, net	0	0		(450)
Other, net	(95)	(55)		(53)
Net cash (used) provided by financing activities	(903)	(1,997)		5,086
Net cash used by discontinued operations	(59)	(51)		(20)
Net increase (decrease) in cash and equivalents	1,922	(61)		(2,020)
Cash and equivalents at beginning of year	902	963		2,983
Cash and equivalents at end of year	2,824	902		963
Floating-rate notes
Cash flows from financing activities:
Proceeds from notes	0	0		1,000
Repayments of notes	$ (500)	$ 0		$ 0

[1] *Prior-period information has been restated for the retrospective application of a change in accounting principle related to the amortization of actuarial gains and losses for our qualified U.S. government pension plans, which we adopted in the fourth quarter of 2020. For further discussion of this change in accounting principle, see Note T to the Consolidated Financial Statements.