CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Cash Flows From Operating Activities
Net loss	$ (48)	$ (351)	$ (266)	$ (3,802)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization of intangible assets			1,583	2,273
Amortization and write-off of debt premiums, discounts and issuance costs			49	62
Asset impairments	33	89	49	434
Acquisition-related contingent consideration			2	(23)
Allowances for losses on trade receivable and inventories			46	48
Deferred income taxes			(233)	(2)
(Gain) loss on sale of assets	(1)	26	(10)	26
Additions (reductions) to accrued legal settlements	9	(40)	12	(30)
Payments of accrued legal settlements			(4)	(222)
Goodwill impairments	0	0	0	2,213
Share-based compensation			77	65
Foreign exchange loss (gain)			8	(16)
Loss on extinguishment of debt	0	0	40	75
Payments of contingent consideration adjustments, including accretion			(1)	(2)
Other			27	(19)
Changes in operating assets and liabilities:
Trade receivables			110	56
Inventories			(205)	(8)
Prepaid expenses and other current assets			16	(53)
Accounts payable, accrued and other liabilities			(33)	107
Net cash provided by operating activities			1,267	1,182
Cash Flows From Investing Activities
Acquisition of businesses, net of cash acquired			(180)	5
Payments for intangible and other assets			(1)	(76)
Purchases of property, plant and equipment			(192)	(95)
Purchases of marketable securities			(8)	(5)
Proceeds from sale of marketable securities			3	5
Proceeds from sale of assets and businesses, net of costs to sell			44	32
Net cash used in investing activities			(334)	(134)
Cash Flows From Financing Activities
Net proceeds from the issuances of long-term debt			3,238	7,471
Repayments of long-term debt			(3,956)	(8,200)
Proceeds from the issuances of short-term debt			12	0
Repayments of short-term debt			(12)	(1)
Payments of employee withholding taxes related to share-based awards			(40)	(10)
Payments of acquisition-related contingent consideration			(27)	(26)
Payments of financing costs			(26)	(62)
Payments of deferred consideration			0	(18)
Other			(1)	(5)
Net cash used in financing activities			(812)	(851)
Effect of exchange rate changes on cash and cash equivalents			(17)	(21)
Net increase in cash and cash equivalents and restricted cash			104	176
Cash and cash equivalents and restricted cash, beginning of period			723	797	$ 797
Cash and cash equivalents and restricted cash, end of period	827	973	827	973	723
Cash and cash equivalents						$ 825	$ 721	$ 973
Restricted cash, current						2	2	0
Cash and cash equivalents and restricted cash, end of period	$ 827	$ 973	$ 723	$ 797	$ 723	$ 827	$ 723	$ 973