OTHER ASSETS, NET (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Intangible Assets
Less accumulated depreciation and amortization	$ (70.9)	$ (63.5)
Data processing software, net	38.5	37.5
Other assets	87.3	38.8
Other assets, net	125.8	76.3
Notes receivable, net	79.3	32.6
Amortization expense	126.6	124.8	$ 138.6
Software development work in progress
Intangible Assets
Software	5.6	8.4
Data processing software
Intangible Assets
Software	103.8	92.6
Amortization expense	$ 7.3	$ 6.9	$ 13.5

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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For each balance sheet presented, the amount of accumulated amortization for capitalized computer software costs.

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Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software.

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The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

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Amount, after allowance for credit loss, of accounts and financing receivables, classified as noncurrent. Includes, but is not limited to, notes and loan receivable.

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Amount of other miscellaneous assets expected to be realized or consumed after one year or normal operating cycle, if longer.

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