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Retirement Plans and Postretirement Medical Benefits (Tables)

12 Months Ended

Dec. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Schedule Of Change In Benefit Obligation, Plan Assets And The Funded Status Of Defined Benefit Pension Plans

The benefit obligations and funded status of defined benefit pension plans are as follows:



	United States						Foreign
	2016			2015			2016			2015
Accumulated benefit obligation	$	1,677,288		$	1,688,982		$	675,566		$	635,600

Projected benefit obligation
Benefit obligation - beginning of year	$	1,689,885		$	1,868,176		$	647,112		$	715,287
Service cost	105			134			2,148			2,229
Interest cost	73,699			74,331			21,886			24,261
Plan participants' contributions	—			—			6			8
Actuarial loss (gain)	31,764			(131,179		)	127,054			(15,375		)
Foreign currency changes	—			—			(88,138		)	(53,945		)
Plan amendments	—			(428		)	—			—
Settlement / curtailment	(5,887		)	(3,678		)	—			—
Special termination benefits	—			—			(423		)	79
Benefits paid	(111,469		)	(117,471		)	(21,473		)	(25,432		)
Benefit obligation - end of year	$	1,678,097		$	1,689,885		$	688,172		$	647,112



Fair value of plan assets available for benefits
Fair value of plan assets - beginning of year	$	1,460,790		$	1,593,463		$	530,112		$	574,992
Actual return on plan assets	110,954			(19,173		)	68,067			11,383
Company contributions	9,694			7,649			40,872			14,194
Plan participants' contributions	—			—			6			8
Settlement / curtailment	(5,887		)	(3,678		)	(423		)	—
Foreign currency changes	—			—			(69,871		)	(45,033		)
Benefits paid	(111,469		)	(117,471		)	(21,473		)	(25,432		)
Fair value of plan assets - end of year	$	1,464,082		$	1,460,790		$	547,290		$	530,112



Amounts recognized in the Consolidated Balance Sheets
Noncurrent asset	$	310		$	271		$	11,744		$	11,566
Current liability	(7,937		)	(9,088		)	(1,045		)	(1,031		)
Noncurrent liability	(206,388		)	(220,277		)	(151,581		)	(127,535		)
Funded status	$	(214,015	)	$	(229,094	)	$	(140,882	)	$	(117,000	)

Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets

Information provided in the table below is only for pension plans with an accumulated benefit obligation in excess of plan assets at December 31, 2016 and 2015:



	United States				Foreign
	2016		2015		2016		2015
Projected benefit obligation	$	1,677,675	$	1,689,476	$	578,588	$	540,984
Accumulated benefit obligation	$	1,676,866	$	1,688,573	$	565,992	$	529,593
Fair value of plan assets	$	1,463,350	$	1,460,111	$	425,962	$	412,418

Schedule of Amounts Recognized in Other Comprehensive Income (Loss)

Other changes in plan assets and benefit obligations for defined benefit pension plans recognized in other comprehensive income were as follows:



	United States						Foreign
	2016			2015			2016			2015
Net actuarial loss (gain)	$	22,728		$	(8,003	)	$	91,549		$	8,663
Prior service credit	—			(428		)	—			—
Amortization of net actuarial loss	(27,220		)	(29,272		)	(5,264		)	(5,926		)
Amortization of prior service credit (cost)	60			60			73			66
Net transition asset	—			—			8			9
Settlement / curtailment	(2,109		)	(1,243		)	(110		)	—
Total recognized in other comprehensive income	$	(6,541	)	$	(38,886	)	$	86,256		$	2,812

Other changes in plan assets and benefit obligation for nonpension postretirement benefit plans recognized in other comprehensive income were as follows:



	2016			2015
Net actuarial gain	$	(13,934	)	$	(31,253	)
Amortization of net actuarial loss	(3,615		)	(7,528		)
Amortization of prior service cost	(297		)	(297		)
Total recognized in other comprehensive income	$	(17,846	)	$	(39,078	)

The estimated amounts that will be amortized from AOCI into net periodic benefit cost in 2017 are as follows:



Net actuarial loss	$	297
Prior service cost	3,537
Total	$	3,834



Pretax amounts recognized in AOCI consist of:
	United States						Foreign
	2016			2015			2016			2015
Net actuarial loss	$	873,523		$	880,123		$	342,169		$	255,994
Prior service credit	(452		)	(512		)	(667		)	(740		)
Transition asset	—			—			(32		)	(40		)
Total	$	873,071		$	879,611		$	341,470		$	255,214

The estimated amounts that will be amortized from AOCI into net periodic benefit cost in 2017 are as follows:



	United States			Foreign
Net actuarial loss	$	29,071		$	8,279
Prior service credit	(60		)	(77		)
Transition asset	—			(8		)
Total	$	29,011		$	8,194

Schedule Of Weighted Average Assumptions Used To Determine Net Periodic Benefit Costs

Weighted-average actuarial assumptions used to determine end of year benefit obligations and net periodic benefit cost for defined benefit pension plans include:



	2016				2015				2014
United States
Used to determine benefit obligations
Discount rate	4.2%				4.55%				4.15%
Rate of compensation increase	N/A				N/A				N/A

Used to determine net periodic benefit cost
Discount rate	4.55%				4.15%				4.95%
Expected return on plan assets	7.0%				7.0%				7.0%
Rate of compensation increase	N/A				N/A				3.5%

Foreign
Used to determine benefit obligations
Discount rate	0.70	%	-	3.65%	1.15	%	-	3.95%	1.10	%	-	3.80%
Rate of compensation increase	1.50	%	-	2.50%	1.50	%	-	3.50%	1.50	%	-	3.50%

Used to determine net periodic benefit cost
Discount rate	1.15	%	-	3.95%	1.10	%	-	3.80%	1.45	%	-	4.60%
Expected return on plan assets	3.75	%	-	6.51%	4.00	%	-	7.00%	3.75	%	-	7.50%
Rate of compensation increase	1.50	%	-	3.50%	1.50	%	-	3.50%	1.50	%	-	3.50%

The weighted-average discount rates used to determine end of year benefit obligation and net periodic pension cost include:



	2016		2015		2014
Discount rate used to determine benefit obligation
U.S.	3.90	%	4.20	%	3.90	%
Canada	3.65	%	3.95	%	3.80	%

Discount rate used to determine net period benefit cost
U.S.	4.20	%	3.90	%	4.40	%
Canada	3.95	%	3.80	%	4.65	%

Schedule Of Target Allocation And Percentage Of Plan Assets For Domestic Pension Plan

The target asset allocation for 2017, and the actual asset allocations at December 31, 2016 and 2015 for the U.S. pension plans are as follows:



	Target allocation		Percent of Plan Assets at December 31,
	2017		2016		2015
Asset category
U.S. equities	15	%	17	%	12	%
Non-U.S. equities	15	%	13	%	10	%
Fixed income	60	%	60	%	68	%
Real estate	5	%	6	%	6	%
Private equity	5	%	4	%	4	%
Total	100	%	100	%	100	%

Schedule Of Target Allocation And Percentage Of Plan Assets For Foreign Pension Plan

The target asset allocation for 2017, and the actual asset allocations at December 31, 2016 and 2015 for the U.K. pension plan are as follows:



	Target Allocation		Percent of Plan Assets at December 31,
	2017		2016		2015
Asset category
U.K. equities	21	%	22	%	23	%
Non-U.K. equities	19	%	19	%	20	%
Fixed income	40	%	41	%	40	%
Real estate	10	%	8	%	10	%
Diversified growth	10	%	9	%	5	%
Cash	—	%	1	%	2	%
Total	100	%	100	%	100	%

Schedule Of Fair Value Measurement Of Plan Assets Domestic

United States Pension Plans



	December 31, 2016
	Level 1		Level 2		Level 3		Total
Money market funds	$	2,604	$	6,609	$	—	$	9,213
Equity securities	184,254		140,691		—		324,945
Commingled fixed income securities	—		358,776		—		358,776
Debt securities - U.S. and foreign governments, agencies and municipalities	214,068		21,126		—		235,194
Debt securities - corporate	—		367,369		—		367,369
Mortgage-backed securities	—		12,636		1,236		13,872
Asset-backed securities	—		1,436		—		1,436
Private equity	—		—		49,637		49,637
Real estate	—		—		87,852		87,852
Securities lending collateral ⁽¹⁾	—		174,651		—		174,651
Total plan assets at fair value	$	400,926	$	1,083,294	$	138,725	$	1,622,945
Securities lending payable ⁽¹⁾							(174,651		)
Cash							18,164
Other							(2,376		)
Fair value of plan assets available for benefits							$	1,464,082



	December 31, 2015
	Level 1		Level 2		Level 3		Total
Money market funds	$	—	$	7,493	$	—	$	7,493
Equity securities	174,664		140,270		—		314,934
Commingled fixed income securities	—		205,246		—		205,246
Debt securities - U.S. and foreign governments, agencies and municipalities	143,449		21,424		—		164,873
Debt securities - corporate	—		592,111		—		592,111
Mortgage-backed securities	—		14,810		1,592		16,402
Asset-backed securities	—		2,535		—		2,535
Private equity	—		—		63,577		63,577
Real estate	—		—		82,569		82,569
Securities lending collateral ⁽¹⁾	—		154,690		—		154,690
Total plan assets at fair value	$	318,113	$	1,138,579	$	147,738	$	1,604,430
Securities lending payable ⁽¹⁾							(154,690		)
Cash							4,072
Other							6,978
Fair value of plan assets available for benefits							$	1,460,790

(1) Securities lending collateral is offset by a corresponding securities lending payable amount.

Schedule Of Fair Value Measurement Of Plan Assets Foreign

Foreign Plans



	December 31, 2016
	Level 1		Level 2		Level 3		Total
Money market funds	$	—	$	6,811	$	—	$	6,811
Equity securities	32,295		181,943		—		214,238
Commingled fixed income securities	—		69,022		—		69,022
Debt securities - U.S. and foreign governments, agencies and municipalities	—		29,363		—		29,363
Debt securities - corporate	—		150,767		—		150,767
Real estate	—		—		34,483		34,483
Diversified growth funds	—		—		36,779		36,779
Derivatives	—		—		—		—
Total plan assets at fair value	$	32,295	$	437,906	$	71,262	$	541,463
Cash							4,262
Other							1,565
Fair value of plan assets available for benefits							$	547,290



	December 31, 2015
	Level 1		Level 2		Level 3		Total
Money market funds	$	—	$	7,596	$	—	$	7,596
Equity securities	33,855		183,110		—		216,965
Commingled fixed income securities	—		138,220		—		138,220
Debt securities - U.S. and foreign governments, agencies and municipalities	—		73,573		—		73,573
Debt securities - corporate	—		27,279		—		27,279
Real estate	—		—		39,177		39,177
Derivatives	—		—		20,513		20,513
Total plan assets at fair value	$	33,855	$	429,778	$	59,690	$	523,323
Cash							6,376
Other							413
Fair value of plan assets available for benefits							$	530,112

Schedule Of Changes In Fair Value Of Level 3 Assets Domestic

The following table summarizes the changes in the fair value of Level 3 assets for the years ended December 31, 2016 and 2015:

United States Pension Plans



	Mortgage-backed securities			Private equity			Real estate			Total
Balance at December 31, 2014	$	2,102		$	81,246		$	74,747		$	158,095
Realized gains	10			14,288			1,027			15,325
Unrealized gains	28			(6,844		)	7,043			227
Net purchases, sales and settlements	(548		)	(25,113		)	(248		)	(25,909		)
Balance at December 31, 2015	1,592			63,577			82,569			147,738
Realized gains	8			10,200			1,280			11,488
Unrealized gains (losses)	38			(7,540		)	4,815			(2,687		)
Net purchases, sales and settlements	(402		)	(16,600		)	(812		)	(17,814		)
Balance at December 31, 2016	$	1,236		$	49,637		$	87,852		$	138,725

Foreign Pension Plans



	Diversified growth funds			Real estate			Total
Balance at December 31, 2014	$	—		$	—		$	—
Unrealized gains	(119		)	(1,685		)	(1,804		)
Net purchases, sales and settlements	20,632			40,862			61,494
Balance at December 31, 2015	20,513			39,177			59,690
Unrealized gains	2,561			459			3,020
Net purchases, sales and settlements	19,028			1,436			20,464
Foreign currency gain/(loss)	(5,323		)	(6,589		)	(11,912		)
Balance at December 31, 2016	$	36,779		$	34,483		$	71,262

Schedule Of Change In Benefit Obligation, Plan Assets And The Funded Status Of Nonpension Benefit Plans

The benefit obligation and funded status for nonpension postretirement benefit plans are as follows:



	2016			2015
Benefit obligation
Benefit obligation - beginning of year	$	211,878		$	253,980
Service cost	2,046			2,455
Interest cost	7,969			8,799
Plan participants' contributions	4,241			4,332
Actuarial (gain) loss	(13,934		)	(31,253		)
Foreign currency changes	409			(3,289		)
Benefits paid	(22,837		)	(23,146		)
Benefit obligation - end of year ⁽¹⁾	$	189,772		$	211,878



Fair value of plan assets
Fair value of plan assets - beginning of year	$	—		$	—
Company contribution	18,596			18,814
Plan participants' contributions	4,241			4,332
Benefits paid	(22,837		)	(23,146		)
Fair value of plan assets - end of year	$	—		$	—



Amounts recognized in the Consolidated Balance Sheets
Current liability	$	(18,127	)	$	(19,406	)
Non-current liability	(171,645		)	(192,472		)
Funded status	$	(189,772	)	$	(211,878	)


(1)	The benefit obligation for the U.S. nonpension postretirement plans was $174 million and $198 million at December 31, 2016 and 2015, respectively.

Pretax amounts recognized in AOCI consist of:



	2016		2015
Net actuarial loss	$	41,625	$	59,174
Prior service cost	1,763		2,060
Total	$	43,388	$	61,234

Schedule of Costs of Retirement Plans

The components of net periodic benefit cost for nonpension postretirement benefit plans were as follows:



	2016		2015		2014
Service cost	$	2,046	$	2,455	$	2,683
Interest cost	7,969		8,799		9,951
Amortization of prior service cost	297		297		159
Amortization of net actuarial loss	3,615		7,528		5,949
Net periodic benefit cost	$	13,927	$	19,079	$	18,742

The components of net periodic benefit cost (income) for defined benefit pension plans were as follows:



	United States									Foreign
	2016			2015			2014			2016			2015			2014
Service cost	$	105		$	134		$	6,908		$	2,148		$	2,229		$	3,565
Interest cost	73,699			74,331			77,655			21,886			24,261			28,518
Expected return on plan assets	(101,918		)	(104,004		)	(103,822		)	(32,615		)	(35,421		)	(39,137		)
Amortization of net transition asset	—			—			—			(8		)	(9		)	(10		)
Amortization of prior service (credit) cost	(60		)	(60		)	9			(73		)	(66		)	(57		)
Amortization of net actuarial loss	27,220			29,272			25,369			5,264			5,926			8,268
Special termination benefits	—			—			—			52			79			1,238
Settlement / curtailment	2,109			1,243			4,528			110			—			—
Net periodic benefit cost (income)	$	1,155		$	916		$	10,647		$	(3,236	)	$	(3,001	)	$	2,385

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates

A 1% change in the assumed health care cost trend rates would have the following effects:



	1% Increase		1% Decrease
Effect on total of service and interest cost components	$	330	$	(276	)
Effect on postretirement benefit obligation	$	7,295	$	(6,212	)

Schedule of Expected Benefit Payments

The following benefit payments, which reflect expected future service, are expected to be paid.



	Pension Benefits		Nonpension Benefits
Years ending December 31,
2017	$	126,344	$	18,155
2018	126,720		17,450
2019	125,486		16,884
2020	127,550		16,231
2021	125,103		15,640
Thereafter	624,809		65,887
	$	1,256,012	$	150,247