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Selected Quarterly Financial Data (Unaudited) - Summary of the impact of the revision on net revenues and cost of sales (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Selected Quarterly Financial Information [Line Items]
Net revenues	$ 4,468	$ 4,093	$ 4,177	$ 4,149	$ 4,419	$ 4,385	$ 4,552	$ 4,916	$ 16,887	$ 18,271	$ 21,853
Cost of sales									$ 9,351	$ 9,975	$ 11,237
As reported [Member]
Selected Quarterly Financial Information [Line Items]
Net revenues		4,264	4,337	4,295	4,559	4,529	4,701	5,065
Cost of sales		2,435	2,443	2,440	2,588	2,552	2,668	2,750
Adjustment [Member]
Selected Quarterly Financial Information [Line Items]
Net revenues		(171)	(159)	(146)	(141)	(143)	(150)	(149)
Cost of sales		(171)	(159)	(146)	(141)	(143)	(150)	(149)
As revised [Member]
Selected Quarterly Financial Information [Line Items]
Net revenues		4,093	4,177	4,149	4,419	4,385	4,552	4,916
Cost of sales		$ 2,264	$ 2,284	$ 2,293	$ 2,447	$ 2,409	$ 2,518	$ 2,601

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Selected Quarterly Financial Information [Line Items]

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

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