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v3.20.1

Stockholders' equity (Components of AOCI) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Increase (Decrease) in AOCI [Roll Forward] |  |
Balance as of beginning of period | $ 9,673 | $ 12,500
Foreign currency translation adjustments | (52) | (13)
Balance as of end of period | 9,485 | 10,832
Foreign currency translation [Member] |  |
Increase (Decrease) in AOCI [Roll Forward] |  |
Balance as of beginning of period | (718) |
Foreign currency translation adjustments | (52) |
Income taxes | 0 |
Balance as of end of period | (770) |
Cash flow hedges [Member] |  |
Increase (Decrease) in AOCI [Roll Forward] |  |
Balance as of beginning of period | 175 |
Unrealized (losses) gains | (162) |
Reclassification adjustments to income | 84 |
Income taxes | (17) |
Balance as of end of period | 114 |
Available-for-sale securities [Member] |  |
Increase (Decrease) in AOCI [Roll Forward] |  |
Balance as of beginning of period | 22 |
Unrealized (losses) gains | 8 |
Reclassification adjustments to income | (33) |
Income taxes | (6) |
Balance as of end of period | 3 |
Other [Member] |  |
Increase (Decrease) in AOCI [Roll Forward] |  |
Balance as of beginning of period | (7) |
Unrealized (losses) gains | 0 |
Other | (2) |
Balance as of end of period | (9) |
AOCI [Member] |  |
Increase (Decrease) in AOCI [Roll Forward] |  |
Balance as of beginning of period | (528) | (769)
Foreign currency translation adjustments | (52) |
Unrealized (losses) gains | (154) |
Reclassification adjustments to income | 51 |
Other | (2) |
Income taxes | 23 |
Balance as of end of period | $ (662) | $ (516)

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