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Fair Value (Tables)
3 Months Ended
Mar. 31, 2022
Fair Value Disclosures [Abstract]  
Fair value, by balance sheet grouping
The following is a listing of our assets and liabilities required to be measured at fair value on a recurring basis and where they are classified within the fair value hierarchy as of March 31, 2022 and December 31, 2021 (in millions):
March 31, 2022
Level 1Level 2Level 3Total
Assets
Cash equivalents$1,128 $15 $— $1,143 
Available-for-sale investment securities— 936 — 936 
Equity investment securities24 — — 24 
December 31, 2021
Level 1Level 2Level 3Total
Assets
Cash equivalents$1,515 $— $— $1,515 
Available-for-sale investment securities— 800 — 800 
Equity investment securities26 — — 26 
Refer to Note 3 to our condensed consolidated financial statements for fair value information related to our outstanding debt obligations as of March 31, 2022 and December 31, 2021.