XML 91 R69.htm IDEA: XBRL DOCUMENT v3.20.4
Commitments (Tables)
 12 Months Ended
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
Schedule of commitments and contingencies A schedule of future minimum long-term purchase commitments, based on expected market prices as of December 31, 2020 is as follows:
(in millions)Purchase
Commitments
2021$2,191.8 
2022566.3 
2023368.3 
2024301.1 
2025248.3 
Subsequent years1,418.8 
$5,094.6