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Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Segment Reporting [Abstract]
Revenues	$ 4,728,325	$ 4,141,801	$ 13,365,592	$ 8,197,154
Operating Income (Loss)	229,466	178,095	581,589	254,278
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,728,325	4,141,801	13,365,592	8,197,154
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	229,466	178,095	581,589	254,278
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	12,481,018		12,481,018		$ 11,880,214
EES
Segment Reporting [Abstract]
Operating Income (Loss)	155,210	105,508	409,062	194,643
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,982,485	1,653,726	5,626,309	3,811,498
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	155,210	105,508	409,062	194,643
CSS
Segment Reporting [Abstract]
Operating Income (Loss)	108,226	89,634	293,446	127,502
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,488,689	1,388,791	4,200,424	1,953,967
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	108,226	89,634	293,446	127,502
UBS
Segment Reporting [Abstract]
Operating Income (Loss)	108,172	74,092	289,895	167,651
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,257,151	1,099,284	3,538,859	2,431,689
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	108,172	74,092	289,895	167,651
Corporate Segment
Segment Reporting [Abstract]
Operating Income (Loss)	(142,142)	(91,139)	(410,814)	(235,518)
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	$ (142,142)	$ (91,139)	$ (410,814)	$ (235,518)

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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No definition available.

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No definition available.

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