Operations by Business Segment and Geographical Area (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Reconciliation of segment information to consolidated amounts
Total segment profit	$ 293,600,000	$ 253,300,000
Corporate general and administrative expense	(32,602,000)	(37,842,000)
Earnings attributable to noncontrolling interests	48,200,000	22,600,000
EARNINGS BEFORE TAXES	306,333,000	240,800,000
Unallocated Amount to Segment
Reconciliation of segment information to consolidated amounts
Corporate general and administrative expense	(32,600,000)	(37,800,000)
Interest income (expense), net	(2,900,000)	2,700,000
Earnings attributable to noncontrolling interests	48,200,000	22,600,000
Total
Reconciliation of segment information to consolidated amounts
EARNINGS BEFORE TAXES	$ 306,300,000	$ 240,800,000