Employee Benefit Plans - Obligations and Funded Status (Details) (USD $)	12 Months Ended
	Dec. 31, 2014 Employees Participants	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan expense	$ 34,263,000	$ 25,645,000	$ 25,805,000
Number of participants covered by post retirement benefit plans	1,165
Number of participants eligible for medical benefits	1,143
Number of employees covered in multiemployer pension plans	100
Contributions to multiemployer plans	2,000,000	2,000,000	2,000,000
Change in Fair Value of Plan Assets [Roll Forward]
Company contributions	(24,232,000)	(40,258,000)	(47,584,000)
Assets and Liabilities [Abstract]
Other liabilities (deferred compensation)	(229,128,000)	(232,669,000)
Accumulated Other Comprehensive Loss (Earnings) [Abstract]
Total Accumulated Other Comprehensive Loss (Earnings), net of tax	147,237,000	105,381,000
Accumulated benefit obligation	907,436,000	856,097,000
Net periodic benefit cost [Abstract]
Total net periodic benefit cost	34,627,000	44,311,000	42,681,000
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected benefit obligation (PBO)	372,931,000	369,289,000
Accumulated benefit obligation (ABO)	342,158,000	336,095,000
Fair value of plan assets	133,930,000	137,654,000
U.S. Pension Plan, Defined Benefit [Member]
Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	519,552,000	603,905,000
Service cost	13,801,000	17,123,000	14,406,000
Interest cost	25,204,000	24,801,000	25,136,000
Plan participants' contributions	0	0
Benefits paid	(17,957,000)	(35,266,000)
Actuarial loss (gain)	84,314,000	(76,605,000)
Business dispositions	0	0
Amendments	0	1,913,000
Settlement and curtailment gains	(49,338,000)	(16,818,000)
Currency translation and other	0	499,000
Benefit obligation at end of year	575,576,000	519,552,000	603,905,000
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	595,143,000	554,648,000
Actual return on plan assets	73,528,000	66,761,000
Company contributions	0	9,000,000
Plan participants' contributions	0	0
Benefits paid	(17,957,000)	(35,266,000)
Business dispositions	0	0
Settlements and curtailments	(49,338,000)	0
Currency translation	0	0
Fair value of plan assets at end of year	601,376,000	595,143,000	554,648,000
Defined Benefit Plan, Funded Status of Plan [Abstract]
Funded status	25,800,000	75,591,000
Assets and Liabilities [Abstract]
Other assets and deferred charges	25,800,000	75,591,000
Accrued compensation and employee benefits	0	0
Other liabilities (deferred compensation)	0	0
Total Assets and Liabilities	25,800,000	75,591,000
Accumulated Other Comprehensive Loss (Earnings) [Abstract]
Net actuarial losses (gains)	119,919,000	86,108,000
Prior service cost (credit)	3,388,000	4,471,000
Net asset at transition, other	0	0
Deferred taxes	(43,158,000)	(31,703,000)
Total Accumulated Other Comprehensive Loss (Earnings), net of tax	80,149,000	58,876,000
Net amount recognized on the balance sheet	105,949,000	134,467,000
Accumulated benefit obligation	537,393,000	482,181,000
Net periodic benefit cost [Abstract]
Service cost	13,801,000	17,123,000	14,406,000
Interest cost	25,204,000	24,801,000	25,136,000
Expected return on plan assets	(41,594,000)	(40,194,000)	(38,978,000)
Amortization of prior service costs (income)	1,083,000	1,026,000	1,048,000
Amortization of actuarial (gains) losses	8,289,000	17,654,000	13,515,000
Amortization of transition obligation	0	0	0
Settlement & curtailment (gain) loss	10,279,000	187,000	0
Other pension costs	0	501,000	0
Total net periodic benefit cost	17,062,000	21,098,000	15,127,000
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Prior service cost (credit)	976,000
Recognized actuarial loss (gain)	12,846,000
Transition obligation	0
Amounts that will be amortized from accumulated other comprehensive earnings (loss) in next fiscal year	13,822,000
Non-U.S. Pension Plans, Defined Benefit [Member]
Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	299,284,000	284,798,000
Service cost	6,027,000	6,043,000	5,712,000
Interest cost	8,222,000	9,081,000	10,044,000
Plan participants' contributions	1,732,000	1,583,000
Benefits paid	(5,452,000)	(11,237,000)
Actuarial loss (gain)	40,962,000	6,501,000
Business dispositions	(60,164,000)	0
Amendments	0	0
Settlement and curtailment gains	(390,000)	(3,036,000)
Currency translation and other	(25,198,000)	5,551,000
Benefit obligation at end of year	265,023,000	299,284,000	284,798,000
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	203,681,000	181,416,000
Actual return on plan assets	14,868,000	17,356,000
Company contributions	9,547,000	11,359,000
Plan participants' contributions	1,732,000	1,583,000
Benefits paid	(5,452,000)	(11,237,000)
Business dispositions	(46,334,000)	0
Settlements and curtailments	(390,000)	0
Currency translation	(14,142,000)	3,204,000
Fair value of plan assets at end of year	163,510,000	203,681,000	181,416,000
Defined Benefit Plan, Funded Status of Plan [Abstract]
Funded status	(101,513,000)	(95,603,000)
Assets and Liabilities [Abstract]
Other assets and deferred charges	152,000	2,976,000
Accrued compensation and employee benefits	(1,575,000)	(1,970,000)
Other liabilities (deferred compensation)	(100,090,000)	(96,609,000)
Total Assets and Liabilities	(101,513,000)	(95,603,000)
Accumulated Other Comprehensive Loss (Earnings) [Abstract]
Net actuarial losses (gains)	61,813,000	38,596,000
Prior service cost (credit)	1,058,000	1,146,000
Net asset at transition, other	(48,000)	(48,000)
Deferred taxes	(15,312,000)	(9,965,000)
Total Accumulated Other Comprehensive Loss (Earnings), net of tax	47,511,000	29,729,000
Net amount recognized on the balance sheet	(54,002,000)	(65,874,000)
Accumulated benefit obligation	246,814,000	280,763,000
Net periodic benefit cost [Abstract]
Service cost	6,027,000	6,043,000	5,712,000
Interest cost	8,222,000	9,081,000	10,044,000
Expected return on plan assets	(8,498,000)	(9,608,000)	(8,765,000)
Amortization of prior service costs (income)	107,000	114,000	117,000
Amortization of actuarial (gains) losses	903,000	1,492,000	579,000
Amortization of transition obligation	4,000	(14,000)	(47,000)
Settlement & curtailment (gain) loss	(45,000)	697,000	1,449,000
Other pension costs	6,000	5,000	0
Total net periodic benefit cost	6,726,000	7,810,000	9,089,000
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Prior service cost (credit)	95,000
Recognized actuarial loss (gain)	2,784,000
Transition obligation	5,000
Amounts that will be amortized from accumulated other comprehensive earnings (loss) in next fiscal year	2,884,000
Supplemental Employee Retirement Plans, Defined Benefit [Member]
Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	133,056,000	180,408,000
Service cost	3,320,000	5,634,000	5,304,000
Interest cost	6,148,000	6,741,000	7,916,000
Plan participants' contributions	0	0
Benefits paid	(13,939,000)	(20,686,000)
Actuarial loss (gain)	11,088,000	(34,831,000)
Business dispositions	(3,137,000)	0
Amendments	1,463,000	3,004,000
Settlement and curtailment gains	0	(7,228,000)
Currency translation and other	0	14,000
Benefit obligation at end of year	137,999,000	133,056,000	180,408,000
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Company contributions	13,939,000	20,686,000
Plan participants' contributions	0	0
Benefits paid	(13,939,000)	(20,686,000)
Business dispositions	0	0
Settlements and curtailments	0	0
Currency translation	0	0
Fair value of plan assets at end of year	0	0	0
Defined Benefit Plan, Funded Status of Plan [Abstract]
Funded status	(137,999,000)	(133,056,000)
Assets and Liabilities [Abstract]
Other assets and deferred charges	0	0
Accrued compensation and employee benefits	(21,978,000)	(10,161,000)
Other liabilities (deferred compensation)	(116,021,000)	(122,895,000)
Total Assets and Liabilities	(137,999,000)	(133,056,000)
Accumulated Other Comprehensive Loss (Earnings) [Abstract]
Net actuarial losses (gains)	(746,000)	(12,520,000)
Prior service cost (credit)	31,381,000	38,646,000
Net asset at transition, other	0	0
Deferred taxes	(10,725,000)	(9,145,000)
Total Accumulated Other Comprehensive Loss (Earnings), net of tax	19,910,000	16,981,000
Net amount recognized on the balance sheet	(118,089,000)	(116,075,000)
Accumulated benefit obligation	123,229,000	93,153,000
Net periodic benefit cost [Abstract]
Service cost	3,320,000	5,634,000	5,304,000
Interest cost	6,148,000	6,741,000	7,916,000
Expected return on plan assets	0	0	0
Amortization of prior service costs (income)	7,775,000	8,110,000	7,425,000
Amortization of actuarial (gains) losses	(428,000)	(16,000)	138,000
Amortization of transition obligation	0	0	0
Settlement & curtailment (gain) loss	0	(4,411,000)	0
Other pension costs	0	13,000	0
Total net periodic benefit cost	16,815,000	16,071,000	20,783,000
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Prior service cost (credit)	6,927,000
Recognized actuarial loss (gain)	286,000
Transition obligation	0
Amounts that will be amortized from accumulated other comprehensive earnings (loss) in next fiscal year	7,213,000
Other Postretirement Benefit Plans, Defined Benefit [Member]
Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	14,136,000	14,571,000
Service cost	249,000	234,000	248,000
Interest cost	627,000	523,000	593,000
Plan participants' contributions	476,000	448,000
Benefits paid	(1,222,000)	(1,163,000)
Actuarial loss (gain)	(556,000)	(618,000)
Business dispositions	0	0
Amendments	0	65,000
Settlement and curtailment gains	0	0
Currency translation and other	233,000	76,000
Benefit obligation at end of year	13,943,000	14,136,000	14,571,000
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Company contributions	746,000	715,000
Plan participants' contributions	476,000	448,000
Benefits paid	(1,222,000)	(1,163,000)
Business dispositions	0	0
Settlements and curtailments	0	0
Currency translation	0	0
Fair value of plan assets at end of year	0	0	0
Defined Benefit Plan, Funded Status of Plan [Abstract]
Funded status	(13,943,000)	(14,136,000)
Assets and Liabilities [Abstract]
Other assets and deferred charges	0	0
Accrued compensation and employee benefits	(926,000)	(971,000)
Other liabilities (deferred compensation)	(13,017,000)	(13,165,000)
Total Assets and Liabilities	(13,943,000)	(14,136,000)
Accumulated Other Comprehensive Loss (Earnings) [Abstract]
Net actuarial losses (gains)	192,000	799,000
Prior service cost (credit)	(615,000)	(1,024,000)
Net asset at transition, other	0	0
Deferred taxes	90,000	20,000
Total Accumulated Other Comprehensive Loss (Earnings), net of tax	(333,000)	(205,000)
Net amount recognized on the balance sheet	(14,276,000)	(14,341,000)
Net periodic benefit cost [Abstract]
Service cost	249,000	234,000	248,000
Interest cost	627,000	523,000	593,000
Amortization of prior service costs (income)	(409,000)	(416,000)	(416,000)
Amortization of actuarial (gains) losses	54,000	134,000	(19,000)
Settlement & curtailment (gain) loss	0	0	(1,493,000)
Other pension costs	233,000	77,000	0
Total net periodic benefit cost	754,000	552,000	(1,087,000)
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Prior service cost (credit)	(372,000)
Recognized actuarial loss (gain)	(30,000)
Transition obligation	0
Amounts that will be amortized from accumulated other comprehensive earnings (loss) in next fiscal year	(402,000)
Knowles [Member]
Accumulated Other Comprehensive Loss (Earnings) [Abstract]
Total Accumulated Other Comprehensive Loss (Earnings), net of tax		7,855,000
Net periodic benefit cost [Abstract]
Total net periodic benefit cost	55,000	1,220,000	1,231,000
Discontinued Operations [Member]
Net periodic benefit cost [Abstract]
Settlement & curtailment (gain) loss	6,675,000
Continuing Operations [Member]
Net periodic benefit cost [Abstract]
Settlement & curtailment (gain) loss	$ 3,604,000