Revenue Recognition (Tables)

9 Months Ended

Jun. 30, 2019

Revenue Recognition

Schedule of revenues disaggregated by revenue sources

	Three months ended				Nine months ended
	June 30,		June 30,		June 30,		June 30,
	2019		2018		2019		2018
	(in millions)
Cost reimbursable	$	2,692.7	$	2,409.2	$	7,832.2	$	7,018.2
Guaranteed maximum price		950.5		1,189.2		2,978.1		3,517.6
Fixed price		1,337.0		1,549.5		4,247.4		4,313.9
Total revenue	$	4,980.2	$	5,147.9	$	15,057.7	$	14,849.7

	Three months ended				Nine months ended
	June 30,		June 30,		June 30,		June 30,
	2019		2018		2019		2018
	(in millions)
Americas	$	4,007.2	$	4,046.3	$	12,103.4	$	11,759.8
Europe, Middle East, Africa		538.0		741.3		1,665.2		1,963.0
Asia Pacific		435.0		360.3		1,289.1		1,126.9
Total revenue	$	4,980.2	$	5,147.9	$	15,057.7	$	14,849.7

Schedule of net accounts receivable

	June 30,		September 30,
	2019		2018
	(in millions)
Billed	$	2,767.1	$	2,697.7
Contract retentions		656.1		661.7
Total accounts receivable—gross		3,423.2		3,359.4
Allowance for doubtful accounts		(49.8)		(51.6)
Total accounts receivable—net	$	3,373.4	$	3,307.8