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Supplemental Cash Flow Information - Net Effects of Changes in Operating Assets and Liabilities, Net, on Cash Flows from Operating Activities (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Supplemental Cash Flow Elements [Abstract]
Accounts and notes receivable	$ (169,041)	$ (272,131)	$ (345,842)	$ (398,574)
Contract assets	(125,878)	20,981	(188,996)	(126,999)
Inventories	(8,436)	13,525	(13,841)	8,727
Prepaid expenses and other current assets	12,991	10,495	(45,002)	(23,142)
Accounts payable and accrued expenses and other non-current liabilities	170,469	203,607	294,259	216,651
Contract liabilities	(48,386)	43,836	22,676	80,042
Other, net	(2,291)	(6,621)	(8,270)	12,813
Net change in operating assets and liabilities, net of non-cash transactions	$ (170,572)	$ 13,692	$ (285,016)	$ (230,482)

X

- Definition

The increase (decrease) during the reporting period of the sum of amounts due within one year (or one business cycle) from customers for the credit sale of goods and services; and from note holders for outstanding loans.

+ References

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-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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- Definition

Amount of increase (decrease) in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

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-Publisher FASB
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-Section 45
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- Definition

Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

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- Definition

The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities.

+ References

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The increase (decrease) during the reporting period of all assets and liabilities used in operating activities.

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The increase (decrease) during the reporting period in other obligations or expenses incurred but not yet paid.

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- Definition

Amount of increase (decrease) in operating assets after deduction of operating liabilities classified as other.

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Amount of increase (decrease) in prepaid expenses, and assets classified as other.

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No definition available.

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