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Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2022
Fair Value Disclosures [Abstract]  
Fair Value Measurement Inputs and Valuation Techniques The following table presents the range and weighted average pull-through rates used in determining the fair value of IRLCs as of the dates presented:
December 31, 2022December 31, 2021
Range
47% - 100%
42% - 100%
Weighted average87%
85%
Summary of Balances of Cash Equivalents and Investments
The following tables present the balances of assets and liabilities measured at fair value on a recurring basis, by level within the fair value hierarchy, as of the dates presented (in millions):
 December 31, 2022
TotalLevel 1Level 2Level 3
Cash equivalents:
Money market funds$1,338 $1,338 $— $— 
Short-term investments:
U.S. government treasury securities1,716 — 1,716 — 
Corporate bonds161 — 161 — 
Commercial paper10 — 10 — 
U.S. government agency securities— — 
Mortgage origination-related:
Mortgage loans held for sale41 — 41 — 
Forward contracts - other current assets— — 
        Total$3,276 $1,338 $1,938 $— 

 December 31, 2021
 TotalLevel 1Level 2Level 3
Cash equivalents:
Money market funds$2,132 $2,132 $— $— 
Short-term investments:
U.S. government treasury securities471 — 471 — 
Corporate bonds33 — 33 — 
Commercial paper10 — 10 — 
Mortgage origination-related:
Mortgage loans held for sale107 — 107 — 
IRLCs - other assets— — 
        Total$2,758 $2,132 $621 $
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation The following table presents the changes in our IRLCs for the periods presented (in millions):
Year Ended December 31, 2022Year Ended December 31, 2021
Balance, beginning of the period$$12 
Issuances15 70 
Transfers(17)(78)
Fair value changes recognized in earnings(3)
Balance, end of period$— $