Segments - Summary of Segment Profit (Detail) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	$ 4,295.0	$ 5,065.0
Gross profit	1,856.0	2,315.0
R&D expenses	261.0	317.0
S&M expenses	648.0	738.0
G&A expenses	292.0	329.0
Segment profit	134.0	1,525.0
North America [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	2,047.0	2,531.0
Gross profit	1,039.0	1,403.0
R&D expenses	165.0	188.0
S&M expenses	268.0	276.0
G&A expenses	112.0	126.0
Other income (loss)	(4.0)	(102.0)
Segment profit	498.0	915.0
Europe [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	1,264.0	1,442.0
Gross profit	730.0	792.0
R&D expenses	66.0	73.0
S&M expenses	215.0	250.0
G&A expenses	48.0	91.0
Other income (loss)	(1.0)	1.0
Segment profit	403.0	377.0
International Markets [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	668.0	750.0
Gross profit	269.0	313.0
R&D expenses	22.0	24.0
S&M expenses	115.0	134.0
G&A expenses	36.0	41.0
Other income (loss)	(0.2)	(8.0)
Segment profit	$ 97.0	$ 122.0

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

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