Segments - Summary of Segment Profit (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	$ 4,264	$ 4,529	$ 12,896	$ 14,295
Gross profit	1,830	1,977	5,579	6,325
R&D expenses	240	311	778	918
S&M expenses	595	699	1,908	2,119
G&A expenses	285	309	873	954
Segment profit	(81)	16	(591)	1,527
North America [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	2,051	2,265	6,169	7,059
Gross profit	1,048	1,196	3,155	3,778
R&D expenses	156	158	497	528
S&M expenses	219	265	756	813
G&A expenses	112	128	342	357
Other (income) expense	(5)	(4)	(6)	(206)
Segment profit	565	649	1,566	2,286
Europe [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	1,163	1,212	3,611	3,982
Gross profit	662	676	2,066	2,195
R&D expenses	63	62	199	208
S&M expenses	206	242	637	725
G&A expenses	56	74	175	243
Other (income) expense	(4)	1	(5)	(1)
Segment profit	341	297	1,060	1,020
International Markets [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	736	726	2,145	2,265
Gross profit	295	301	877	942
R&D expenses	21	21	66	70
S&M expenses	114	120	348	384
G&A expenses	32	37	102	115
Other (income) expense	(1)		(2)	(11)
Segment profit	$ 130	$ 123	$ 363	$ 384

Other Operating Income (Expense)

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The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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The costs incurred in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, excluding in-process research and development acquired in a business combination consummated during the period. Excludes software research and development, which has a separate concept.

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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.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The aggregate total amount of expenses directly related to the marketing or selling of products or services.

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