Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 413	$ 306
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	311	295
Asset Impairment Charges	113	0
Change in fair value of contingent consideration	32	31
Payments of contingent consideration	(18)	0
Share-based compensation expense	172	151
Deferred taxes	(57)	96
Unrealized Gain (Loss) on Derivatives and Commodity Contracts	8	11
Other	(1)	(1)
Changes in operating assets and liabilities
Accounts receivable	(35)	(130)
Inventories	(69)	(72)
Prepaid expenses and other assets	(94)	(120)
Accounts payable, accrued expenses and other liabilities	102	93
Deferred revenue	(19)	43
Net cash provided by operating activities	858	703
Cash flows from investing activities:
Purchases of available-for-sale securities	(1,580)	(656)
Proceeds from maturity or sale of available-for-sale securities	932	485
Purchases of trading securities	(8)	(6)
Purchases of property, plant and equipment	(269)	(226)
Other	6	1
Net cash used in investing activities	(919)	(402)
Cash flows from financing activities:
Payments on term loan	(131)	(175)
Repurchase of common stock	(299)	(400)
Net proceeds from issuance of common stock under share-based compensation arrangements	76	28
Payment For Contingent Consideration Liability, Financing Activities	(7)	0
Payments on facility lease obligation	(10)	(5)
Net cash used in financing activities	(371)	(552)
Effect of exchange rate changes on cash	16	3
Net change in cash and cash equivalents	(416)	(248)
Cash and cash equivalents at beginning of period	966	1,010
Cash and cash equivalents at end of period	550	762
Supplemental cash flow disclosures from investing and financing activities:
Capitalization of construction costs related to facility lease obligations	110	85
Accrued expenses for purchases of property, plant and equipment	$ 33	$ 23