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Segments - Summary of Segment Profit (Detail) - USD ($) $ in Millions | 3 Months Ended
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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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