Amortized Cost | Unrealized Gains | Unrealized Losses | Estimated Fair Value | ||||||||||||
Current assets: | |||||||||||||||
Cash | $ | 286,221 | $ | — | $ | — | $ | 286,221 | |||||||
Cash equivalents: | |||||||||||||||
Money market mutual funds | 429,373 | — | — | 429,373 | |||||||||||
Time deposits | 104,711 | — | — | 104,711 | |||||||||||
U.S. Treasury securities | 14,251 | — | — | 14,251 | |||||||||||
Total cash equivalents | 548,335 | — | — | 548,335 | |||||||||||
Total cash and cash equivalents | 834,556 | — | — | 834,556 | |||||||||||
Short-term fixed income securities: | |||||||||||||||
Corporate bonds and commercial paper | 1,261,375 | 7,116 | (631 | ) | 1,267,860 | ||||||||||
Foreign government securities | 11,213 | 56 | — | 11,269 | |||||||||||
Municipal securities | 186,320 | 328 | (24 | ) | 186,624 | ||||||||||
U.S. agency securities | 446,615 | 1,516 | (186 | ) | 447,945 | ||||||||||
U.S. Treasury securities | 424,076 | 799 | (97 | ) | 424,778 | ||||||||||
Subtotal | 2,329,599 | 9,815 | (938 | ) | 2,338,476 | ||||||||||
Marketable equity securities | 177 | 543 | — | 720 | |||||||||||
Total short-term investments | 2,329,776 | 10,358 | (938 | ) | 2,339,196 | ||||||||||
Total cash, cash equivalents and short-term investments | $ | 3,164,332 | $ | 10,358 | $ | (938 | ) | $ | 3,173,752 | ||||||
Amortized Cost | Unrealized Gains | Unrealized Losses | Estimated Fair Value | ||||||||||||
Current assets: | |||||||||||||||
Cash | $ | 200,771 | $ | — | $ | — | $ | 200,771 | |||||||
Cash equivalents: | |||||||||||||||
Corporate bonds and commercial paper | 3,998 | — | — | 3,998 | |||||||||||
Money market mutual funds and repurchase agreements | 1,171,270 | — | — | 1,171,270 | |||||||||||
Municipal securities | 3,895 | — | — | 3,895 | |||||||||||
Time deposits | 45,118 | — | — | 45,118 | |||||||||||
Total cash equivalents | 1,224,281 | — | — | 1,224,281 | |||||||||||
Total cash and cash equivalents | 1,425,052 | — | — | 1,425,052 | |||||||||||
Short-term fixed income securities: | |||||||||||||||
Corporate bonds and commercial paper | 1,059,158 | 11,415 | (133 | ) | 1,070,440 | ||||||||||
Foreign government securities | 6,919 | 45 | (12 | ) | 6,952 | ||||||||||
Municipal securities | 180,488 | 97 | (60 | ) | 180,525 | ||||||||||
Time deposits | 20,113 | — | — | 20,113 | |||||||||||
U.S. agency securities | 501,863 | 2,346 | (18 | ) | 504,191 | ||||||||||
U.S. Treasury securities | 330,072 | 801 | (37 | ) | 330,836 | ||||||||||
Subtotal | 2,098,613 | 14,704 | (260 | ) | 2,113,057 | ||||||||||
Marketable equity securities | 237 | 7 | — | 244 | |||||||||||
Total short-term investments | 2,098,850 | 14,711 | (260 | ) | 2,113,301 | ||||||||||
Total cash, cash equivalents and short-term investments | $ | 3,523,902 | $ | 14,711 | $ | (260 | ) | $ | 3,538,353 | ||||||