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Fair Value Measurements Assets and Liabilities Measured at Fair Value on a Nonrecurring (Tables)
 12 Months Ended
Dec. 31, 2022
Assets and Liabilities Measured at Fair Value on Recurring Basis [Abstract]  
Fair Value Measurements, Nonrecurring [Table Text Block]
The following table presents information about our financial instruments that are not measured at fair value on a recurring basis as of December 31, 2022, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value.
 December 31, 2022December 31, 2021
 Level 1Level 2Level 3TotalLevel 1Level 2Level 3Total
Total long-term debt 1
$0.0 $2,551.5 $0.8 $2,552.3 $0.0 $3,295.6 $41.8 $3,337.4 
1 The majority of the decrease from December 31, 2021 to December 31, 2022 in Level 3 total long-term debt is related to the settlement of $36.1 of a senior note issued by IPG.