REVENUE (Tables)

9 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Accounts receivables and current and long-term contract assets and liabilities

The Company’s Accounts receivable and current and long-term contract assets and liabilities are summarized in the following table.

	Accounts Receivable, Less Allowance		Contract Assets (Current)		Contract Assets (Long-Term)		Contract Liabilities (Current)		Contract Liabilities (Long-Term)
Balance at December 31, 2019	$	2,088.9	$	50.5	$	178.2	$	242.8	$	10.4
Balance at September 30, 2020	2,454.5		49.0		177.8		243.9		10.7

Schedule of allowance for doubtful accounts

The following table summarizes the movement in the Company's allowance for doubtful accounts:

Balance at December 31, 2019	$	36.5
Adjustment upon adoption of ASU 2016-13	3.0
Bad debt expense	63.6
Uncollectible accounts written off, net of recoveries	(26.0)
Balance at September 30, 2020	$	77.1