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Segments - Summary of Segment Profit (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Revenues $ 3,978 $ 4,093 $ 12,206 $ 12,420
Gross profit 1,852 1,830 5,678 5,579
R&D expenses 258 240 704 778
S&M expenses 605 595 1,815 1,908
G&A expenses 279 285 846 873
Segment profit (4,342) (81) (3,978) (591)
North America [Member]        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Revenues 2,017 2,051 6,146 6,169
Gross profit 1,056 1,048 3,208 3,155
R&D expenses 155 156 455 497
S&M expenses 250 219 755 756
G&A expenses 97 112 325 342
Other (income) expense (5) (5) (9) (6)
Segment profit 560 565 1,682 1,566
Europe [Member]        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Revenues 1,116 1,163 3,520 3,611
Gross profit 637 662 2,009 2,066
R&D expenses 60 63 180 199
S&M expenses 200 206 590 637
G&A expenses 66 56 184 175
Other (income) expense (1) (4) (3) (5)
Segment profit 312 341 1,058 1,060
International Markets [Member]        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Revenues 529 565 [1] 1,582 1,668 [1]
Gross profit 275 295 828 877 [1]
R&D expenses 17 21 51 66 [1]
S&M expenses 101 114 312 348 [1]
G&A expenses 33 32 96 102 [1]
Other (income) expense (1) (1) (10) (2) [1]
Segment profit $ 125 $ 130 $ 378 $ 363 [1]
[1] The data presented for prior periods have been revised to reflect a revision in the presentation of net revenues and cost of sales in the consolidated financial statements. See note 1c.