Johnson Mills reported the following information in its 2015 financial statements ($ in millions):

	2015			2014
Balance Sheets:
Accounts receivable, net	$	2,248.0		$	1,725.2
2015 Income statement:
Sales revenue	$	18,578.1

A note disclosed that the allowance for uncollectible accounts had a balance of $31.9 million and $31.3 million at the end of 2015 and 2014, respectively. Bad debt expense for 2015 was $21.6 million. Required:

Determine the amount of cash collected from customers during 2015.