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Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
(Increase) decrease in:
Accounts and notes receivable, net	$ 5,393	$ 138,388	$ 210,419
Contract assets	(178,632)	280,360	207,467
Other current assets	(167,416)	3,893	(80,248)
Other assets	283,895	76,613	44,707
Increase (decrease) in:
Accounts payable	6,360	(343,113)	(46,873)
Contract liabilities	(175,812)	(53,580)	202,359
Accrued liabilities	108,896	(11,829)	29,880
Other liabilities	(79,336)	(59,684)	63,986
Increase (decrease) in cash due to changes in assets and liabilities	(196,652)	31,048	631,697
Cash paid during the year for:
Interest	90,299	65,641	71,938
Income taxes (net of refunds)	$ 74,589	$ 65,188	$ 204,080

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