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Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2020
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, 2020December 31, 2019
Carrying AmountFair ValueCarrying AmountFair Value
Cash and cash equivalents$1,073.3  $1,073.3  $519.1  $519.1  
Accounts receivable689.6  689.6  803.9  803.9  
Accounts payable811.9  811.9  680.4  680.4  
Structured accounts payable arrangements410.3  410.3  740.6  740.6  
Short-term debt610.0  610.0  41.6  41.6  
Long-term debt, including current portion4,587.1  4,803.4  4,572.7  4,920.9