Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net income	$ 74	$ 23
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	38	38
Amortization	111	114
Restructuring charges	4	8
Deferred taxes	3	(11)
Share-based compensation expense	11	9
Profit-sharing expense	10	6
Non-cash lease expense	36	33
Net periodic pension benefit	(6)	(22)
Loss on extinguishment of debt, net	3
Other, net	(7)	12
Pension contributions	(2)	(27)
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	12	(57)
Contract assets	(47)	(91)
Inventories	(6)	(19)
Prepaid expenses and other current assets	(50)	(25)
Accounts payable	(18)	34
Accrued liabilities and income taxes payable	(63)	(49)
Contract liabilities	21	29
Other assets and liabilities	(51)	(69)
Net cash provided by (used in) operating activities	73	(64)
Cash flows from investing activities:
Acquisitions, net of cash acquired	(45)	(2,875)
Purchases of property and equipment	(46)	(34)
Proceeds from sales of property, equipment, and businesses	9	6
Net cash used in investing activities	(82)	(2,903)
Cash flows from financing activities:
Proceeds from long-term borrowings		1,101
Payments on long-term borrowings	(204)	(31)
Payments of debt issuance costs		(25)
Repurchases of common stock	(23)	(22)
Proceeds from equity issuances		797
Payments of acquisition-related consideration	(3)	(1)
Restricted shares tendered for taxes	(2)	(1)
Net cash (used in) provided by financing activities	(232)	1,818
Effect of foreign currency exchange rate change on cash, cash equivalents, and restricted cash	4	(9)
Net decrease in cash, cash equivalents, and restricted cash	(237)	(1,158)
Cash, cash equivalents, and restricted cash, beginning of period	607	1,491
Cash, cash equivalents, and restricted cash, end of period	370	333
Supplemental cash flow disclosures:
Cash paid for interest	79	48
Cash paid for income taxes, net of refunds	48	16
Accrued consideration issued in business combinations	4
Share of common stock issued to profit sharing plan	$ 14	$ 13