Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Cash flows from operating activities:
Net income	$ 109	$ 8
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	43	69
Amortization of debt issuance costs and discounts	2	4
Share-based compensation	10	7
Deferred income taxes	(2)	(9)
Unrealized gain on forward interest rate swaps	(12)	0
Other, net	(1)	1
Changes in operating assets and liabilities:
Accounts receivable, net	9	79
Inventories, net	6	(31)
Other assets	(7)	17
Accounts payable	(12)	(52)
Accrued liabilities	(74)	0
Deferred revenue	19	30
Income taxes	22	(2)
Other operating activities	4	(4)
Net cash provided by operating activities	116	117
Cash flows from investing activities:
Purchases of property, plant and equipment	(18)	(13)
Purchases of long-term investments	(2)	0
Net cash used in investing activities	(20)	(13)
Cash flows from financing activities:
Payments of long-term debt	(95)	(80)
Proceeds from exercise of stock options and stock purchase plan purchases	3	4
Taxes paid related to net share settlement of equity awards	0	(2)
Net cash used in financing activities	(92)	(78)
Effect of exchange rate changes on cash	(2)	(2)
Net increase in cash and cash equivalents	2	24
Cash and cash equivalents at beginning of period	62	156
Cash and cash equivalents at end of period	64	180
Supplemental disclosures of cash flow information:
Income taxes paid	2	5
Interest paid	$ 26	$ 16