UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2019	Mar. 30, 2018
Operating activities:
Net income	$ 223	$ 208
Less: income from discontinued operations, net of tax	0	(16)
Income from continuing operations	223	192
Depreciation of property, plant and equipment	43	43
Amortization of intangibles and other assets	15	13
Deferred income tax provision	8	16
Stock-based employee compensation expense	12	20
Contributions to employee savings plans in common stock	30	32
Amortization of pension and postretirement benefit plans net loss and prior service cost	9	18
Other non-cash items	5	1
Changes in operating assets and liabilities, excluding amounts from acquisitions and divestitures, and discontinued operations:
Billed receivables	116	(73)
Contract assets	(142)	(145)
Inventories	(20)	(65)
Prepaid expenses and other current assets	(31)	(99)
Accounts payable, trade	(32)	56
Accrued employment costs	(70)	(54)
Accrued expenses	(31)	(6)
Contract liabilities	43	41
Income taxes	14	(11)
All other operating activities	(18)	(14)
Net cash from (used in) operating activities from continuing operations	174	(35)
Investing activities:
Proceeds from the sale of businesses, net of closing date cash balances	1	0
Working capital adjustment on prior divestitures	(20)	0
Capital expenditures	(49)	(56)
Dispositions of property, plant and equipment	3	2
Other investing activities	(9)	(29)
Net cash used in investing activities from continuing operations	(74)	(83)
Financing activities:
Borrowings under revolving credit facility	0	207
Repayments of borrowings under revolving credit facility	0	(207)
Common stock repurchased	0	(119)
Dividends paid	(70)	(65)
Proceeds from exercises of stock options	19	55
Proceeds from employee stock purchase plan	0	8
Repurchases of common stock to satisfy tax withholding obligations	(22)	(23)
Other financing activities	(7)	(2)
Net cash used in financing activities from continuing operations	(80)	(146)
Effect of foreign currency exchange rate changes on cash and cash equivalents	3	6
Net cash from (used in) discontinued operations:
Operating activities	19	(29)
Investing activities	0	(1)
Net cash from (used in) discontinued operations	19	(30)
Net increase (decrease) cash and cash equivalents	42	(288)
Cash and cash equivalents, beginning of the period	1,066	662
Cash and cash equivalents, end of the period	$ 1,108	$ 374