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Financial Instruments Cost and Fair Value of Financial Instruments (Details) - USD ($) $ in Millions | Apr. 30, 2017 | Jan. 31, 2017 | Apr. 30, 2016 | Jan. 31, 2016
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Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | $ 1,340.2 |  | $ 1,213.1 |  | $ 1,223.4 | $ 1,353.0
Derivative contracts, Amortized Cost |  | 5.1 | [1] | 2.2 | [2] |  |
Derivative contracts, Gross unrealized gains |  | 5.1 | [1] | 12.3 | [2] |  |
Derivative contracts, Gross unrealized losses |  | (1.8) | [1] | (11.7) | [2] |  |
Derivative contracts, Fair Value |  | 8.4 | [1] | 2.8 | [2] |  |
Amortized Cost |  | 1,655.0 |  | 1,903.5 |  |  |
Gross unrealized gains |  | 12.6 |  | 17.4 |  |  |
Gross unrealized losses |  | (3.6) |  | (13.6) |  |  |
Fair Value |  | 1,664.0 |  | 1,907.3 |  |  |
Marketable Securities, Current |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Mutual funds, Amortized Cost |  | 48.3 |  | 44.8 |  |  |
Mutual funds, Gross unrealized gains |  | 4.2 |  | 2.5 |  |  |
Mutual funds, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Mutual funds, Fair Value |  | 52.5 |  | 47.3 |  |  |
Marketable Securities, Current | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 7.5 |  | 13.2 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  |  |  |  |
Marketable securities, Fair Value |  | 7.5 |  | 13.2 |  |  |
Marketable Securities, Current | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 30.9 |  | 19.6 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 30.9 |  | 19.6 |  |  |
Marketable Securities, Current | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 19.7 |  | 157.3 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 19.7 |  | 157.3 |  |  |
Marketable Securities, Current | Commercial paper |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 81.3 |  | 109.2 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 81.3 |  | 109.2 |  |  |
Marketable Securities, Current | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 204.9 |  | 234.7 |  |  |
Marketable securities, Gross unrealized gains |  | 0.1 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | (0.1) |  | (0.2) |  |  |
Marketable securities, Fair Value |  | 204.9 |  | 234.5 |  |  |
Marketable Securities, Current | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 36.9 |  | 43.4 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 36.9 |  | 43.4 |  |  |
Marketable Securities, Current | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 12.0 |  | 30.0 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 12.0 |  | 30.0 |  |  |
Marketable Securities, Current | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 25.4 |  | 32.3 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 25.4 |  | 32.3 |  |  |
Marketable Securities, Noncurrent | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 2.6 |  | 7.1 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 2.6 |  | 7.1 |  |  |
Marketable Securities, Noncurrent | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 54.9 |  | 65.8 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.1 |  |  |
Marketable securities, Gross unrealized losses |  | (0.1) |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 54.8 |  | 65.9 |  |  |
Marketable Securities, Noncurrent | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 143.1 |  | 172.1 |  |  |
Marketable securities, Gross unrealized gains |  | 0.2 |  | 0.1 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | (0.1) |  |  |
Marketable securities, Fair Value |  | 143.3 |  | 172.1 |  |  |
Marketable Securities, Noncurrent | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 7.6 |  | 10.7 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 7.6 |  | 10.7 |  |  |
Marketable Securities, Noncurrent | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  |  |  | 1.5 |  |  |
Marketable securities, Gross unrealized gains |  |  |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  |  |  | 0.0 |  |  |
Marketable securities, Fair Value |  |  |  | 1.5 |  |  |
Marketable Securities, Noncurrent | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 56.1 |  | 48.8 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.1 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 56.1 |  | 48.9 |  |  |
Convertible debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Convertible debt securities, Amortized Cost |  | 8.9 | [3] | 4.9 | [4] |  |
Convertible debt securities, Gross unrealized gains |  | 3.0 | [3] | 2.3 | [4] |  |
Convertible debt securities, Gross unrealized losses |  | (1.6) | [3] | (1.6) | [4] |  |
Convertible debt securities, Fair Value |  | 10.3 | [3] | 5.6 | [4] |  |
Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | 17.0 | [5] | 6.0 | [6] |  |
Cash equivalents, Fair Value |  | 17.0 | [5] | 6.0 | [6] |  |
Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents | [5] | 2.5 |  |  |  |  |
Cash equivalents, Fair Value | [5] | 2.5 |  |  |  |  |
Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | 61.0 | [5] | 63.1 | [6] |  |
Cash equivalents, Fair Value |  | 61.0 | [5] | 63.1 | [6] |  |
Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | 10.2 | [5] | 40.2 | [6] |  |
Cash equivalents, Fair Value |  | 10.2 | [5] | 40.2 | [6] |  |
Commercial paper |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | 212.0 | [5] | 207.4 | [6] |  |
Cash equivalents, Fair Value |  | 212.0 | [5] | 207.4 | [6] |  |
Custody cash deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | 27.0 | [5] | 3.2 | [6] |  |
Cash equivalents, Fair Value |  | 27.0 | [5] | 3.2 | [6] |  |
Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | 5.0 | [5] | 5.0 | [6] |  |
Cash equivalents, Fair Value |  | 5.0 | [5] | 5.0 | [6] |  |
Money Market funds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | 542.6 | [5] | 256.5 |  |  |
Cash equivalents, Fair Value |  | 542.6 | [5] | 256.5 |  |  |
Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents | [6] |  |  | 15.0 |  |  |
Cash equivalents, Fair Value | [6] |  |  | 15.0 |  |  |
U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | 32.5 | [5] | 309.5 | [6] |  |
Cash equivalents, Fair Value |  | 32.5 | [5] | 309.5 | [6] |  |
Level 1 |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Derivative contracts, Fair Value |  | 0.0 | [1] | 0.0 | [2] |  |
Fair Value |  | 709.2 |  | 1,193.8 |  |  |
Level 1 | Marketable Securities, Current |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Mutual funds, Fair Value |  | 52.5 |  | 47.3 |  |  |
Level 1 | Marketable Securities, Current | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 7.5 |  | 13.2 |  |  |
Level 1 | Marketable Securities, Current | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 1 | Marketable Securities, Current | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 19.7 |  | 157.3 |  |  |
Level 1 | Marketable Securities, Current | Commercial paper |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 1 | Marketable Securities, Current | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 204.9 |  | 234.5 |  |  |
Level 1 | Marketable Securities, Current | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 36.9 |  | 43.4 |  |  |
Level 1 | Marketable Securities, Current | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 1 | Marketable Securities, Current | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 25.4 |  | 32.3 |  |  |
Level 1 | Marketable Securities, Noncurrent | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 2.6 |  | 7.1 |  |  |
Level 1 | Marketable Securities, Noncurrent | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 1 | Marketable Securities, Noncurrent | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 143.3 |  | 172.1 |  |  |
Level 1 | Marketable Securities, Noncurrent | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 7.6 |  | 10.7 |  |  |
Level 1 | Marketable Securities, Noncurrent | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  |  |  | 0.0 |  |  |
Level 1 | Marketable Securities, Noncurrent | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 56.1 |  | 48.9 |  |  |
Level 1 | Convertible debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Convertible debt securities, Fair Value |  | 0.0 | [3] | 0.0 | [4] |  |
Level 1 | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 17.0 | [5] | 6.0 | [6] |  |
Level 1 | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value | [5] | 0.0 |  |  |  |  |
Level 1 | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 61.0 | [5] | 63.1 | [6] |  |
Level 1 | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 10.2 | [5] | 40.2 | [6] |  |
Level 1 | Commercial paper |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [5] | 0.0 | [6] |  |
Level 1 | Custody cash deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 27.0 | [5] | 3.2 | [6] |  |
Level 1 | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 5.0 | [5] | 5.0 | [6] |  |
Level 1 | Money Market funds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [5] | 0.0 |  |  |
Level 1 | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value | [6] |  |  | 0.0 |  |  |
Level 1 | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 32.5 | [5] | 309.5 | [6] |  |
Level 2 |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Derivative contracts, Fair Value |  | 4.5 | [1] | 1.5 | [2] |  |
Fair Value |  | 940.6 |  | 706.6 |  |  |
Level 2 | Marketable Securities, Current |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Mutual funds, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Marketable Securities, Current | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Marketable Securities, Current | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 30.9 |  | 19.6 |  |  |
Level 2 | Marketable Securities, Current | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Marketable Securities, Current | Commercial paper |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 81.3 |  | 109.2 |  |  |
Level 2 | Marketable Securities, Current | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Marketable Securities, Current | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Marketable Securities, Current | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 12.0 |  | 30.0 |  |  |
Level 2 | Marketable Securities, Current | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Marketable Securities, Noncurrent | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Marketable Securities, Noncurrent | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 54.8 |  | 65.9 |  |  |
Level 2 | Marketable Securities, Noncurrent | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Marketable Securities, Noncurrent | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Marketable Securities, Noncurrent | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  |  |  | 1.5 |  |  |
Level 2 | Marketable Securities, Noncurrent | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Convertible debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Convertible debt securities, Fair Value |  | 0.0 | [3] | 0.0 | [4] |  |
Level 2 | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [5] | 0.0 | [6] |  |
Level 2 | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value | [5] | 2.5 |  |  |  |  |
Level 2 | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [5] | 0.0 | [6] |  |
Level 2 | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [5] | 0.0 | [6] |  |
Level 2 | Commercial paper |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 212.0 | [5] | 207.4 | [6] |  |
Level 2 | Custody cash deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [5] | 0.0 | [6] |  |
Level 2 | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [5] | 0.0 | [6] |  |
Level 2 | Money Market funds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 542.6 | [5] | 256.5 |  |  |
Level 2 | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value | [6] |  |  | 15.0 |  |  |
Level 2 | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [5] | 0.0 | [6] |  |
Level 3 |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Derivative contracts, Fair Value |  | 3.9 | [1] | 1.3 | [2] |  |
Fair Value |  | 14.2 |  | 6.9 |  |  |
Level 3 | Marketable Securities, Current |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Mutual funds, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Current | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Current | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Current | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Current | Commercial paper |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Current | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Current | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Current | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Current | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Noncurrent | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Noncurrent | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Noncurrent | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Noncurrent | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Noncurrent | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  |  |  | 0.0 |  |  |
Level 3 | Marketable Securities, Noncurrent | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Convertible debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Convertible debt securities, Fair Value |  | 10.3 | [3] | 5.6 | [4] |  |
Level 3 | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [5] | 0.0 | [6] |  |
Level 3 | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value | [5] | 0.0 |  |  |  |  |
Level 3 | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [5] | 0.0 | [6] |  |
Level 3 | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [5] | 0.0 | [6] |  |
Level 3 | Commercial paper |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [5] | 0.0 | [6] |  |
Level 3 | Custody cash deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [5] | 0.0 | [6] |  |
Level 3 | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [5] | 0.0 | [6] |  |
Level 3 | Money Market funds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [5] | 0.0 |  |  |
Level 3 | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value | [6] |  |  | 0.0 |  |  |
Level 3 | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | $ 0.0 | [5] | $ 0.0 | [6] |  |
[1] | Included in “Prepaid expenses and other current assets” or “Other assets” in the accompanying Condensed Consolidated Balance Sheets.
[2] | Included in “Prepaid expenses and other current assets,” “Other assets,” or “Other accrued liabilities” in the accompanying Condensed Consolidated Balance Sheets.
[3] | Considered “available-for-sale” and included in “Other assets” in the accompanying Condensed Consolidated Balance Sheets.
[4] | Considered “available-for-sale” and included in “Other assets” in the accompanying Condensed Consolidated Balance Sheets.
[5] | Included in “Cash and cash equivalents” in the accompanying Condensed Consolidated Balance Sheets.
[6] | Included in “Cash and cash equivalents” in the accompanying Condensed Consolidated Balance Sheets.

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