Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Activities
Net earnings (loss)	$ 579	$ 544	$ 696
Adjustments to reconcile to net cash provided by (used in) operating activities
Depreciation	218	207	191
Amortization of purchased intangibles	140	86	56
Amortization of debt issuance costs	8	8	7
Provision for doubtful accounts	(7)	7	(1)
Stock-based compensation	36	33	23
Deferred income taxes	2	98	23
Loss on early extinguishment of debt			21
Loss (gain) on investments in marketable securities	25	(19)	(17)
Asset impairments			13
Change in
Accounts receivable	(196)	58	(70)
Contract assets	70	(126)	22
Inventoried costs	(22)	(25)	11
Prepaid expenses and other assets	20	(88)	(62)
Accounts payable and accruals	6	45	344
Retiree benefits	(127)	(78)	(176)
Other non-cash transactions, net	14	10	12
Net cash provided by (used in) operating activities	766	760	1,093
Capital expenditures
Capital expenditure additions	(284)	(331)	(353)
Grant proceeds for capital expenditures	12	20	17
Acquisitions of businesses, net of cash received		(1,643)	(417)
Investment in affiliates	(5)	(22)
Proceeds from disposition of business		20
Other investing activities, net	9	2	(6)
Net cash provided by (used in) investing activities	(268)	(1,954)	(759)
Financing Activities
Proceeds from issuance of long-term debt		1,650	1,000
Repayment of long-term debt	(400)	(25)	(600)
Proceeds from line of credit borrowings	24		385
Repayment of line of credit borrowings	(24)		(385)
Debt issuance costs		(22)	(13)
Premiums and fees related to early extinguishment of debt			(15)
Dividends paid	(192)	(186)	(172)
Repurchases of common stock	(52)	(101)	(84)
Employee taxes on certain share-based payment arrangements	(14)	(7)	(13)
Net cash provided by (used in) financing activities	(658)	1,309	103
Change in cash and cash equivalents	(160)	115	437
Cash and cash equivalents, beginning of period	627	512	75
Cash and cash equivalents, end of period	467	627	512
Supplemental Cash Flow Disclosure
Cash paid for income taxes (net of refunds)	127	33	155
Cash paid for interest	100	76	89
Non-Cash Investing and Financing Activities
Capital expenditures accrued in accounts payable	$ 12	$ 6	$ 7