Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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Summary of Significant Accounting Policies - ASU 2014-09 (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Recently Adopted Accounting Standards
Net sales before shipping and handling costs	$ 1,537	$ 1,563	$ 1,608	$ 1,581	$ 1,543	$ 1,591	$ 1,558	$ 1,552	$ 6,289	$ 6,244	$ 6,082
Less: Shipping and handling costs	111	113	112	112	106	106	101	99	448	412	378
Net sales	$ 1,426	$ 1,450	$ 1,496	$ 1,469	$ 1,437	$ 1,485	$ 1,457	$ 1,453	$ 5,841	5,832	5,704
ASU 2014-09 \| As Reported, Before 606
Recently Adopted Accounting Standards
Net sales before shipping and handling costs										6,180	6,022
Less: Shipping and handling costs										348	318
Net sales										$ 5,832	$ 5,704