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Investments - Schedule of Investments by Major Security Type (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Short-term investments    
Debt securities, amortized cost $ 2,650  
Debt securities, total estimated fair value 2,633  
Total short-term investments 3,369 $ 3,197
Long-term investments:    
Debt securities, amortized cost 2,650  
Debt securities, total estimated fair value 2,633  
Short-term investments    
Short-term investments    
Debt securities, amortized cost 2,637 2,508
Debt securities, gross unrealized gains 1 6
Debt securities, gross unrealized losses (9) (7)
Debt securities, total estimated fair value 2,629 2,507
Time deposits 740 690
Amortized Cost 3,377 3,198
Total short-term investments 3,369 3,197
Long-term investments:    
Debt securities, amortized cost 2,637 2,508
Debt securities, gross unrealized gains 1 6
Debt securities, gross unrealized losses (9) (7)
Debt securities, total estimated fair value 2,629 2,507
Short-term investments | Certificates of deposit    
Short-term investments    
Debt securities, amortized cost 11 172
Debt securities, gross unrealized gains 0 0
Debt securities, gross unrealized losses 0 0
Debt securities, total estimated fair value 11 172
Long-term investments:    
Debt securities, amortized cost 11 172
Debt securities, gross unrealized gains 0 0
Debt securities, gross unrealized losses 0 0
Debt securities, total estimated fair value 11 172
Short-term investments | Government bonds    
Short-term investments    
Debt securities, amortized cost 353 332
Debt securities, gross unrealized gains 0 1
Debt securities, gross unrealized losses (1) 0
Debt securities, total estimated fair value 352 333
Long-term investments:    
Debt securities, amortized cost 353 332
Debt securities, gross unrealized gains 0 1
Debt securities, gross unrealized losses (1) 0
Debt securities, total estimated fair value 352 333
Short-term investments | Commercial paper    
Short-term investments    
Debt securities, amortized cost 364 366
Debt securities, gross unrealized gains 0 0
Debt securities, gross unrealized losses 0 0
Debt securities, total estimated fair value 364 366
Long-term investments:    
Debt securities, amortized cost 364 366
Debt securities, gross unrealized gains 0 0
Debt securities, gross unrealized losses 0 0
Debt securities, total estimated fair value 364 366
Short-term investments | Corporate debt securities    
Short-term investments    
Debt securities, amortized cost 1,688 1,490
Debt securities, gross unrealized gains 1 4
Debt securities, gross unrealized losses (4) (3)
Debt securities, total estimated fair value 1,685 1,491
Long-term investments:    
Debt securities, amortized cost 1,688 1,490
Debt securities, gross unrealized gains 1 4
Debt securities, gross unrealized losses (4) (3)
Debt securities, total estimated fair value 1,685 1,491
Short-term investments | Mortgage-backed and asset-backed securities    
Short-term investments    
Debt securities, amortized cost 221 148
Debt securities, gross unrealized gains 0 1
Debt securities, gross unrealized losses (4) (4)
Debt securities, total estimated fair value 217 145
Long-term investments:    
Debt securities, amortized cost 221 148
Debt securities, gross unrealized gains 0 1
Debt securities, gross unrealized losses (4) (4)
Debt securities, total estimated fair value 217 145
Long-term investments | Corporate debt securities    
Short-term investments    
Debt securities, amortized cost 13 13
Debt securities, gross unrealized gains 0 0
Debt securities, gross unrealized losses (9) (9)
Debt securities, total estimated fair value 4 4
Long-term investments:    
Debt securities, amortized cost 13 13
Debt securities, gross unrealized gains 0 0
Debt securities, gross unrealized losses (9) (9)
Debt securities, total estimated fair value $ 4 $ 4