Accounting Policies - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net Sales		$ 15,475	$ 15,377	$ 15,158
Net Income		708	365	1,284
Cost of goods sold		(11,961)	(11,680)	(10,935)
Selling, administrative and general expense		(2,312)	(2,279)	(2,409)
Other (income) expense		(174)	70	25
Adoption of new accounting standard			1		$ (56)
Research and development expenditures		424	406	388
Advertising costs		345	320	355
Maximum cash investments with single counterparty		180
Capital lease obligations		6	5	3
Accrued capital expenditures remaining unpaid		266	265	264
Payments for capital expenditures accrued and unpaid in prior year		265	264	254
Restricted net assets		697
Depreciation expense for property, plant and equipment		$ 776	779	726
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Payment term		30 days
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Payment term		90 days
Scenario, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of goods sold	$ (24)
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net Income		$ 693	346	1,264
Adoption of new accounting standard			1		$ (56)
Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of goods sold			39	37
Selling, administrative and general expense			23	2
General and administrative expense			28	$ 24
Other (income) expense		9
Accounting Standards Update 2016-16 | Deferred Income Taxes
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adoption of new accounting standard			(7)
Accounting Standards Update 2016-16 | Other Assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adoption of new accounting standard			5
Accounting Standards Update 2016-16 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adoption of new accounting standard			$ (2)
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net Sales		7
Net Income		$ 5