Segment Information - Narrative (Details) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)		Sep. 30, 2018 USD ($) segment	Sep. 30, 2017 USD ($)
Segment Reporting Information [Line Items]
Number of product segments (in segments) | segment				2
Number of reportable segments (in segments) | segment				5
Number of operating segments (in segments) | segment				5
Non-service related postretirement costs	$ 18	$ 30	[1]	$ 65	$ 82	[1]
Operating Segments | Pet Nutrition
Segment Reporting Information [Line Items]
Non-service related postretirement costs		6			18
Corporate
Segment Reporting Information [Line Items]
Non-service related postretirement costs		6			10
North America | Operating Segments | Oral, Personal and Home Care
Segment Reporting Information [Line Items]
Non-service related postretirement costs		15			43
Latin America | Operating Segments | Oral, Personal and Home Care
Segment Reporting Information [Line Items]
Non-service related postretirement costs		2			5
Europe | Operating Segments | Oral, Personal and Home Care
Segment Reporting Information [Line Items]
Non-service related postretirement costs		1			4
Asia Pacific | Operating Segments | Oral, Personal and Home Care
Segment Reporting Information [Line Items]
Non-service related postretirement costs		0			1
Africa/Eurasia | Operating Segments | Oral, Personal and Home Care
Segment Reporting Information [Line Items]
Non-service related postretirement costs		0			1
Sales Revenue, Net
Segment Reporting Information [Line Items]
Percentage of consolidated Net sales represented by sales outside US	70.00%			70.00%
Percentage of consolidated Net sales coming from emerging markets	50.00%			50.00%
Global Growth and Efficiency Program
Segment Reporting Information [Line Items]
Total Global Growth and Efficiency Program charges, pretax	$ 26	58		$ 115	246
Global Growth and Efficiency Program | Corporate | Included in Operating profit (loss)
Segment Reporting Information [Line Items]
Total Global Growth and Efficiency Program charges, pretax	$ 25	$ 47		$ 107	$ 233

[1] Prior year amounts have been reclassified to conform to the current year presentation as a result of the adoption of Accounting Standards Update (“ASU”) No. 2017-07, “Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.” For further information regarding the impact of the reclassification, see Note 1, Basis of Presentation, Note 3, Recent Accounting Pronouncements and Updated Accounting Policies and Note 13, Segment Information to the Condensed Consolidated Financial Statements.