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Indebtedness (Tables)
 12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Components of Indebtedness Long-term debt consisted of the following at December 31, 2021 and 2020 (in millions):
December 31, 2021December 31, 2020
Senior term loan due 2022$— $184.0 
Credit facility, expires 2023— 277.9 
1.002% Senior term loan due 2025
283.7 306.7 
Senior term loans due between 2023 and 2028(1)
445.9 806.0 
0.800% Senior Notes Due 2028
680.8 — 
Other long-term debt7.7 10.5 
Debt issuance costs(4.8)(2.5)
1,413.3 1,582.6 
Less: Senior term loans due 2021, net of debt issuance costs— (323.6)
           Current portion of other long-term debt(2.1)(2.3)
Total long-term indebtedness, less current portion$1,411.2 $1,256.7 
Maturities of Long-term Debt At December 31, 2021, the aggregate scheduled maturities of long-term debt, excluding the current portion of long-term debt, are as follows (in millions):
2023$281.7 
20242.3 
2025355.1 
202659.7 
Thereafter712.4 
$1,411.2