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Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2021
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
The carrying amounts and estimated fair values of our financial instruments are as follows:
June 30, 2021December 31, 2020
Carrying AmountFair ValueCarrying AmountFair Value
Cash and cash equivalents$1,417.6 $1,417.6 $574.0 $574.0 
Accounts receivable930.5 930.5 881.1 881.1 
Accounts payable924.8 924.8 769.1 769.1 
Structured accounts payable arrangements830.7 830.7 640.0 640.0 
Short-term debt0.1 0.1 0.1 0.1 
Long-term debt, including current portion4,462.8 5,033.2 4,578.0 5,172.1