Comprehensive Income (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Reclassifications out of accumulated other comprehensive income (loss)
Total cost of revenue	$ (6,329,685)	$ (6,829,781)	$ (20,030,907)	$ (19,653,774)
Interest expense	(6,435)	(6,890)	(19,838)	(20,381)
Corporate general and administrative expense	(46,070)	(40,884)	(110,590)	(109,932)
Income tax expense	(87,391)	(92,164)	(271,834)	(251,449)
NET EARNINGS	217,351	172,338	637,947	542,034
Net earnings attributable to noncontrolling interests	(44,305)	(27,755)	(137,031)	(81,379)
Net of tax and noncontrolling interest	173,046	144,583	500,916	460,655
Defined benefit pension plan | Reclassified out of AOCI
Reclassifications out of accumulated other comprehensive income (loss)
Various accounts, primarily cost of revenue and corporate general and administrative expense	(3,220)		(9,666)
Income tax expense	1,208		3,625
NET EARNINGS	(2,012)		(6,041)
Unrealized loss on derivative contracts | Reclassified out of AOCI
Reclassifications out of accumulated other comprehensive income (loss)
Income tax expense	949		1,315
NET EARNINGS	(1,582)		(2,180)
Net earnings attributable to noncontrolling interests			(1)
Net of tax and noncontrolling interest	(1,582)		(2,181)
Unrealized loss on derivative contracts | Reclassified out of AOCI | Commodity contracts and foreign currency contracts
Reclassifications out of accumulated other comprehensive income (loss)
Total cost of revenue	(2,112)		(2,237)
Unrealized loss on derivative contracts | Reclassified out of AOCI | Interest rate contracts
Reclassifications out of accumulated other comprehensive income (loss)
Interest expense	(419)		(1,258)
Unrealized gain on available-for- sale securities | Reclassified out of AOCI
Reclassifications out of accumulated other comprehensive income (loss)
Corporate general and administrative expense	3		139
Income tax expense	(1)		(52)
NET EARNINGS	$ 2		$ 87