Condensed Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash provided (required) by operating activities:
Net income	$ 212.9	$ 181.3
Adjustments to reconcile net income to cash provided (required) by operating activities:
Depreciation	51.8	41.0
Amortization	13.7	10.7
Gain (loss) on disposal of assets	0.2	(1.0)
Employee benefit plan and stock-based compensation costs	46.6	34.4
Deferred income tax provision	31.5	31.3
Unrealized (gain) loss on derivative instruments	14.5	(4.3)
Other	(4.6)	2.5
Changes in operating assets and liabilities, net of effects of acquisitions:
Trade receivables, net	(221.9)	(41.6)
Inventories, net	(127.7)	(115.2)
Accounts payable, trade	(5.4)	110.7
Advance payments and progress billings	(19.0)	(8.5)
Income taxes	(36.5)	(11.1)
Accrued pension and other postretirement benefits, net	(30.2)	(48.7)
Other assets and liabilities, net	(35.4)	(61.4)
Cash provided (required) by operating activities	(109.5)	120.1
Cash provided (required) by investing activities:
Capital expenditures	(191.1)	(102.8)
Acquisitions, net of cash and cash equivalents acquired	(328.6)
Other	1.4	(0.1)
Cash required by investing activities	(518.3)	(102.9)
Cash provided (required) by financing activities:
Net increase in short-term debt	68.9
Net increase in commercial paper	252.1	113.0
Proceeds from issuance of long-term debt	275.0
Repayments of long-term debt	(0.2)	(5.4)
Proceeds from exercise of stock options	0.3	0.6
Purchase of treasury stock	(21.0)	(7.2)
Other	(15.8)	(9.1)
Cash provided by financing activities	559.3	91.9
Effect of exchange rate changes on cash and cash equivalents	(0.2)	3.4
Increase (decrease) in cash and cash equivalents	(68.7)	112.5
Cash and cash equivalents, beginning of period	344.0	315.5
Cash and cash equivalents, end of period	$ 275.3	$ 428.0