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Fair Value Measurements
3 Months Ended
Mar. 31, 2021
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
The following tables present the Company’s fair value hierarchy for financial assets and liabilities measured as of March 31, 2021 and December 31, 2020 ($ in millions):
March 31, 2021
Level 1Level 2Level 3Total
Assets:
U.S. Government obligations$— $6.5 $— $6.5 
Total$— $6.5 $— $6.5 
December 31, 2020
Level 1Level 2Level 3Total
Assets:
U.S. Government obligations$— $6.6 $— $6.6 
Total$— $6.6 $— $6.6 
There were no transfers between Level 1, Level 2, or Level 3 during the three months ended March 31, 2021 and December 31, 2020, respectively.