Commitments And Contingencies (Asbestos Liability) (Detail) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013 Claim	Dec. 31, 2012	Sep. 30, 2014	Dec. 31, 2011	Jun. 16, 2014	Mar. 09, 2012	Jul. 14, 2008 Year	Jun. 30, 2014 Year	Jun. 30, 2009	Feb. 23, 2011	Mar. 23, 2010	Aug. 17, 2011	Feb. 25, 2013	Aug. 29, 2012	Oct. 23, 2012	Nov. 28, 2012	Mar. 01, 2013	Jul. 31, 2013	Sep. 11, 2013	Sep. 17, 2013
Loss Contingencies [Line Items]
Payments for asbestos-related fees and costs, net of insurance recoveries	$ 10,700,000	$ 12,900,000
Current portion of total estimated liability	79,000,000		79,000,000
Airplane Operating Lease Period Years			5
Fair Value Of Residual Value Guarantee						7,800,000
Fair Value Of Residual Value Guarantee, Fair Value of Operating Lease Asset Threshold						9,500,000
ResidualValueGuaranteePayment		9,500,000
Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Pending claims	44,587	50,899	47,507	51,490
Number of judgments paid						3
Payments for asbestos-related fees and costs, net of insurance recoveries	10,700,000	12,900,000	61,300,000
Cumulative claims resolved	110,000
Settlement cost	430,000,000
Average settlement cost per resolved claim			3,800	3,300	6,300
Cumulative average settlement cost per resolved claim	3,900
Number of years included in methodology base reference period	2
Additional quarters included in methodology base reference period	3
Estimated payments to current and future claimants	36,000,000,000
Additional liability							285,000,000
Percentage of mesothelioma claims of total pending asbestos claims							8.00%
Percentage of mesothelioma claims of aggregate settlement and defense costs							90.00%
Liability for claims	600,000,000						894,000,000
Percentage Of Asbestos Liability Attributable To Settlement And Denfese Costs For Future Claims							80.00%
Current portion of total estimated liability	79,000,000
Number of coverage in place agreements with excess insurer groups	11
Number of buyout agreements with excess insurer groups	10
Aggregate value of policy buyout agreements	82,500,000
Forecasted percentage of liability that would be reimbursed by insurers							25.00%
Insurance reimbursement asset	144,000,000						225,000,000
Gross Settlement And Defense Incurred Costs	18,300,000	20,500,000	81,100,000
Selwyn Hackshaw [Member] | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
CourtJudgmentIncludingSetoffs								3,100,000
Court judgment								6,000,000
Jury Verdict Total								10,000,000
Frank Paasch | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Jury verdict									123,000
Share Of Responsibility Of Verdict									12.50%
Joseph Norris | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Number of years after judgment paid, years										2
Jury verdict payment including accrued judgment interest										2,540,000
Earl Haupt | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Number of years after judgment paid, years											2
Jury verdict payment												20,000
James Nelson | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Jury verdict														14,500,000
Share Of Responsibility Of Verdict														9.09%
Court judgment against all parties held responsible													4,000,000
Additional interest on the compensation awarded													10,000
Larry Bell | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Court judgment													200,000
Jury verdict														3,500,000
Share Of Responsibility Of Verdict														5.00%
Ronald Dummitt | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Court written decision															8,000,000
Court judgment															4,900,000
Jury verdict percentage of responsibility.															99.00%
Jury verdict															32,000,000
Frank Paasch | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Jury verdict																2,500,000
Share Of Responsibility Of Verdict																10.00%
William Paulus | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Jury verdict payment											900,000
Court judgment																	800,000
Share Of Responsibility Of Verdict																	10.00%
Jury Verdict Non-Economic Damages																	6,500,000
Jury Verdict Economic Damages																	400,000
Frank Vincinguerra | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Jury verdict																2,300,000
Share Of Responsibility Of Verdict																20.00%
Gerald Suttner | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Court judgment																		100,000
Share Of Responsibility Of Verdict																		4.00%
Plaintiff's Damages																		3,000,000
James Hellam | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
CourtJudgmentIncludingSetoffs																			1,100,000
Court judgment																			1,282,000
Share Of Responsibility Of Verdict																			7.00%
Jury Verdict Non-Economic Damages																			4,500,000
Jury Verdict Economic Damages																			900,000
Ivo Peraica | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Court judgment																				10,600,000
Jury Verdict Total																				35,000,000
Court_Reduced_Verdict																				18,000,000
Holdsworth [Member] | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Plaintiff's Request																					1,100,000
Amended Plaintiff's Request																					1,700,000
Jury Verdict Total																					3,100,000
Lloyd Garvin [Member] | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Compensatory Damages																						11,000,000
CourtJudgmentIncludingSetoffs																						3,500,000
Court Reduced damages																						3,500,000
Additional damages																						11,000,000
Court Reduced Compensatory Damages Verdict																						2,500,000
Richard DeLisle [Member] | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Court judgment																							1,300,000
Jury verdict																							8,000,000
Share Of Responsibility Of Verdict																							16.00%
Ivan Sweberg [Member] | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Plaintiff's Request								5,300,000
Court judgment								10,000,000
Jury Verdict Total								$ 15,000,000
New York | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Pending claims	18,600
Mississippi | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Pending claims	5,100
Texas | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Pending claims	7,300
Ohio | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Pending claims	300