CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 1,123,473		$ 970,876	[1]	$ 872,702	[1]
Other comprehensive income (loss), net of tax
Net gain (loss) from foreign currency translation	(308,300)		117,331		(91,247)
Retirement and postretirement benefit plan adjustments	69,583		(17,650)		(30,909)
Deferred loss on interest rate hedges:
Increase in deferred loss associated with contract revaluation and settlement	0		(2,407)		(16,852)
Amount of loss reclassified to interest expense in consolidated statements of income	1,935		1,207		0
Net other comprehensive income (loss)	(236,782)	[2]	98,481		(139,008)
Comprehensive Income	$ 886,691		$ 1,069,357		$ 733,694

[1] Reclassified to conform to current presentation.

[2] All amounts are presented net of income taxes.