v3.23.1
Investments - Schedule of Debt Securities Available-for-Sale (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Short-term investments      
Debt securities, amortized cost $ 2,426.0    
Debt securities, total estimated fair value 2,411.0    
Time deposits     $ 20.0
Equity investments     1.0
Amortized Cost 2,434.0   2,253.0
Total short-term investments 2,428.0   2,244.0
Long-term investments:      
Debt securities, amortized cost 2,426.0    
Debt securities, total estimated fair value 2,411.0    
Equity investments:      
Carrying Value, Beginning of Period 75.0 $ 75.0 75.0
Upward Adjustments 0.0   0.0
Downward Adjustments 0.0   0.0
Carrying Value, End of Period 75.0   75.0
Impairment of investments 0.0 $ 0.0  
Cumulative downward adjustments for observable price changes and impairment 56.2   56.2
Short-Term Investments      
Short-term investments      
Debt securities, amortized cost 2,413.0   2,232.0
Debt securities, gross unrealized gains 3.0   1.0
Debt securities, gross unrealized losses (9.0)   (10.0)
Debt securities, total estimated fair value 2,407.0   2,223.0
Time deposits 20.0    
Equity investments 1.0    
Long-term investments:      
Debt securities, amortized cost 2,413.0   2,232.0
Debt securities, gross unrealized gains 3.0   1.0
Debt securities, gross unrealized losses (9.0)   (10.0)
Debt securities, total estimated fair value 2,407.0   2,223.0
Short-Term Investments | Certificates of deposit      
Short-term investments      
Debt securities, amortized cost 492.0   573.0
Debt securities, gross unrealized gains 0.0   0.0
Debt securities, gross unrealized losses 0.0   0.0
Debt securities, total estimated fair value 492.0   573.0
Long-term investments:      
Debt securities, amortized cost 492.0   573.0
Debt securities, gross unrealized gains 0.0   0.0
Debt securities, gross unrealized losses 0.0   0.0
Debt securities, total estimated fair value 492.0   573.0
Short-Term Investments | Government bonds      
Short-term investments      
Debt securities, amortized cost 254.0   83.0
Debt securities, gross unrealized gains 1.0   0.0
Debt securities, gross unrealized losses 0.0   0.0
Debt securities, total estimated fair value 255.0   83.0
Long-term investments:      
Debt securities, amortized cost 254.0   83.0
Debt securities, gross unrealized gains 1.0   0.0
Debt securities, gross unrealized losses 0.0   0.0
Debt securities, total estimated fair value 255.0   83.0
Short-Term Investments | Commercial paper      
Short-term investments      
Debt securities, amortized cost 586.0   574.0
Debt securities, gross unrealized gains 0.0   0.0
Debt securities, gross unrealized losses 0.0   0.0
Debt securities, total estimated fair value 586.0   574.0
Long-term investments:      
Debt securities, amortized cost 586.0   574.0
Debt securities, gross unrealized gains 0.0   0.0
Debt securities, gross unrealized losses 0.0   0.0
Debt securities, total estimated fair value 586.0   574.0
Short-Term Investments | Corporate debt securities      
Short-term investments      
Debt securities, amortized cost 1,023.0   965.0
Debt securities, gross unrealized gains 2.0   1.0
Debt securities, gross unrealized losses (6.0)   (7.0)
Debt securities, total estimated fair value 1,019.0   959.0
Long-term investments:      
Debt securities, amortized cost 1,023.0   965.0
Debt securities, gross unrealized gains 2.0   1.0
Debt securities, gross unrealized losses (6.0)   (7.0)
Debt securities, total estimated fair value 1,019.0   959.0
Short-Term Investments | Mortgage-backed and asset-backed securities      
Short-term investments      
Debt securities, amortized cost 58.0   37.0
Debt securities, gross unrealized gains 0.0   0.0
Debt securities, gross unrealized losses (3.0)   (3.0)
Debt securities, total estimated fair value 55.0   34.0
Long-term investments:      
Debt securities, amortized cost 58.0   37.0
Debt securities, gross unrealized gains 0.0   0.0
Debt securities, gross unrealized losses (3.0)   (3.0)
Debt securities, total estimated fair value 55.0   34.0
Long-term investments | Corporate debt securities      
Short-term investments      
Debt securities, amortized cost 13.0   13.0
Debt securities, gross unrealized gains 0.0   0.0
Debt securities, gross unrealized losses (9.0)   (9.0)
Debt securities, total estimated fair value 4.0   4.0
Long-term investments:      
Debt securities, amortized cost 13.0   13.0
Debt securities, gross unrealized gains 0.0   0.0
Debt securities, gross unrealized losses (9.0)   (9.0)
Debt securities, total estimated fair value $ 4.0   $ 4.0