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v3.23.3

Cash, Cash Equivalents and Short-Term Investments - Unrealized Loss Position Aggregated By Investment (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Less than 12 months |  |
Fair Value | $ 78.5 | $ 314.3
Gross Unrealized Losses | (0.9) | (6.0)
More than 12 months |  |
Fair Value | 575.9 | 633.7
Gross Unrealized Losses | (31.2) | (42.2)
Total |  |
Fair Value | 654.4 | 948.0
Gross Unrealized Losses | (32.1) | (48.2)
Corporate notes and obligations |  |
Less than 12 months |  |
Fair Value | 36.5 | 176.5
Gross Unrealized Losses | (0.3) | (3.5)
More than 12 months |  |
Fair Value | 255.4 | 292.3
Gross Unrealized Losses | (15.1) | (19.2)
Total |  |
Fair Value | 291.9 | 468.8
Gross Unrealized Losses | (15.4) | (22.7)
U.S. Treasury securities |  |
Less than 12 months |  |
Fair Value | 35.4 | 110.9
Gross Unrealized Losses | (0.6) | (1.8)
More than 12 months |  |
Fair Value | 187.2 | 176.9
Gross Unrealized Losses | (9.0) | (12.2)
Total |  |
Fair Value | 222.6 | 287.8
Gross Unrealized Losses | (9.6) | (14.0)
Asset backed securities |  |
Less than 12 months |  |
Fair Value | 4.3 | 13.7
Gross Unrealized Losses | 0.0 | (0.4)
More than 12 months |  |
Fair Value | 71.6 | 90.4
Gross Unrealized Losses | (3.4) | (5.6)
Total |  |
Fair Value | 75.9 | 104.1
Gross Unrealized Losses | (3.4) | (6.0)
Municipal securities |  |
Less than 12 months |  |
Fair Value | 0.0 | 9.3
Gross Unrealized Losses | 0.0 | (0.3)
More than 12 months |  |
Fair Value | 51.1 | 51.6
Gross Unrealized Losses | (2.9) | (3.8)
Total |  |
Fair Value | 51.1 | 60.9
Gross Unrealized Losses | (2.9) | (4.1)
U.S. agency obligations |  |
Less than 12 months |  |
Fair Value | 2.3 | 3.9
Gross Unrealized Losses | 0.0 | 0.0
More than 12 months |  |
Fair Value | 3.4 | 13.8
Gross Unrealized Losses | (0.4) | (0.8)
Total |  |
Fair Value | 5.7 | 17.7
Gross Unrealized Losses | (0.4) | (0.8)
Foreign government obligations |  |
Less than 12 months |  |
Fair Value | 0.0 | 0.0
Gross Unrealized Losses | 0.0 | 0.0
More than 12 months |  |
Fair Value | 5.6 | 5.5
Gross Unrealized Losses | (0.2) | (0.4)
Total |  |
Fair Value | 5.6 | 5.5
Gross Unrealized Losses | (0.2) | (0.4)
Supranational securities |  |
Less than 12 months |  |
Fair Value | 0.0 | 0.0
Gross Unrealized Losses | 0.0 | 0.0
More than 12 months |  |
Fair Value | 1.6 | 3.2
Gross Unrealized Losses | (0.2) | (0.2)
Total |  |
Fair Value | 1.6 | 3.2
Gross Unrealized Losses | $ (0.2) | $ (0.2)

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