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Revenue (Tables)
6 Months Ended
Jun. 30, 2022
Revenue Recognition [Abstract]  
Disaggregation of Revenue [Table Text Block] The following table presents our revenues disaggregated by geography, based on the billing addresses of our customers:
 Three Months Ended June 30,Six Months Ended June 30,
2022202120222021
 (In millions)
U.S.$230.9 $211.0 $455.5 $418.1 
EMEA56.4 57.7 115.0 114.1 
China26.5 25.4 52.5 51.1 
Other38.1 35.3 75.8 69.7 
Total revenues$351.9 $329.4 $698.8 $653.0