Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash provided (required) by operating activities:
Net income	$ 21.9	$ 256.1
Adjustments to reconcile net income to cash provided (required) by operating activities:
Depreciation	88.3	85.5
Amortization	35.5	25.7
Employee benefit plan and stock-based compensation costs	42.5	47.7
Unrealized loss on derivative instruments	0.2	22.5
Deferred income tax provision (benefit)	(6.9)	8.2
Impairments	39.4	4.3
Other	27.5	16.9
Changes in operating assets and liabilities, net of effects of acquisitions:
Trade receivables, net and costs in excess of billings	128.7	143.1
Inventories, net	89.0	29.6
Accounts payable, trade	(114.8)	(99.6)
Advance payments and billings in excess of costs	(87.8)	(154.1)
Income taxes payable, net	3.9	(63.4)
Accrued pension and other post-retirement benefits, net	(11.8)	(19.0)
Other assets and liabilities, net	(150.6)	(67.8)
Cash provided by operating activities	105.0	235.7
Cash provided (required) by investing activities:
Capital expenditures	(67.0)	(161.2)
Investments in joint ventures	(24.4)
Proceeds from sale of wireline assets	19.0
Other	2.6	8.6
Cash required by investing activities	(69.8)	(152.6)
Cash provided (required) by financing activities:
Net increase in short-term debt	2.9	0.9
Net increase (decrease) in commercial paper	164.5	(17.0)
Purchase of treasury stock	(54.8)	(91.6)
Acquisitions, payment of withheld purchase price		(9.6)
Payments related to taxes withheld on stock-based compensation	(7.8)	(7.7)
Other	(3.0)	(4.3)
Cash provided (required) by financing activities	101.8	(129.3)
Effect of exchange rate changes on cash and cash equivalents	21.8	(5.4)
Increase (decrease) in cash and cash equivalents	158.8	(51.6)
Cash and cash equivalents, beginning of period	916.2	638.8
Cash and cash equivalents, end of period	$ 1,075.0	$ 587.2