Other Comprehensive Income (Loss) - Significant Items Reclassified Out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Reclassifications out of accumulated other comprehensive income (loss)
Cost of revenue	$ (4,057,159)	$ (4,070,859)
Income tax expense (benefit)	66,831	(15,257)
Interest expense	(18,323)	(18,630)
Net earnings (loss)	(256,450)	(45,045)
Ownership Share of Equity Method Investees’ Other Comprehensive Income (Loss) | Reclassified out of AOCI
Reclassifications out of accumulated other comprehensive income (loss)
Cost of revenue	(188)	(189)
Income tax expense (benefit)	47	47
Net of tax	(141)	(142)
Defined Benefit Pension and Postretirement Plans | Reclassified out of AOCI
Reclassifications out of accumulated other comprehensive income (loss)
Income tax expense (benefit)	(44)	146
Corporate G&A	(1,002)	(2,210)
Net of tax	(1,046)	(2,064)
Accumulated OCI, Net | Reclassified out of AOCI
Reclassifications out of accumulated other comprehensive income (loss)
Income tax expense (benefit)	(4)	504
Net earnings (loss)	219	(761)
Accumulated OCI, Net | Reclassified out of AOCI | Commodity and foreign currency contracts
Reclassifications out of accumulated other comprehensive income (loss)
Cost of revenue	642	(845)
Accumulated OCI, Net | Reclassified out of AOCI | Interest rate contracts
Reclassifications out of accumulated other comprehensive income (loss)
Interest expense	$ (419)	$ (420)