Pension and Non-pension Postretirement Benefits (Net Benefit Costs) (Details) (USD $)	1 Months Ended	3 Months Ended		6 Months Ended
	May 31, 2012	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Defined Benefit Pension Plans and SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		$ 1,918,000	$ 1,771,000	$ 3,915,000	$ 3,631,000
Interest cost		5,005,000	5,301,000	10,280,000	10,649,000
Expected return on plan assets		(5,044,000)	(4,884,000)	(10,136,000)	(9,762,000)
Amortization of unrecognized:
Prior service cost		584,000	631,000	1,171,000	1,254,000
Loss / (gain)		1,843,000	1,246,000	3,779,000	2,590,000
Settlement charge		37,000	0	457,000	0
Pension expense or non-pension postretirement benefit expense		4,343,000	4,065,000	9,466,000	8,362,000
Defined Benefit Plan, Contributions [Abstract]
Estimated employer contributions to defined benefit plans in remainder of 2012		1,700,000		1,700,000
Employer contributions made to defined benefit plans		85,800,000		94,800,000
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		1,370,000	1,314,000	2,925,000	2,746,000
Interest cost		3,827,000	3,940,000	7,846,000	8,028,000
Expected return on plan assets		(4,461,000)	(4,259,000)	(8,946,000)	(8,572,000)
Amortization of unrecognized:
Prior service cost		522,000	541,000	1,043,000	1,082,000
Loss / (gain)		1,719,000	1,112,000	3,520,000	2,330,000
Settlement charge		37,000	0	457,000	0
Pension expense or non-pension postretirement benefit expense		3,014,000	2,648,000	6,845,000	5,614,000
Defined Benefit Plan, Contributions [Abstract]
Employer contributions made to defined benefit plans	79,700,000
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		548,000	457,000	990,000	885,000
Interest cost		1,178,000	1,361,000	2,434,000	2,621,000
Expected return on plan assets		(583,000)	(625,000)	(1,190,000)	(1,190,000)
Amortization of unrecognized:
Prior service cost		62,000	90,000	128,000	172,000
Loss / (gain)		124,000	134,000	259,000	260,000
Settlement charge		0	0	0	0
Pension expense or non-pension postretirement benefit expense		1,329,000	1,417,000	2,621,000	2,748,000
Non-Pension Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		368,000	307,000	736,000	680,000
Interest cost		882,000	924,000	1,765,000	1,878,000
Amortization of unrecognized:
Prior service cost		106,000	106,000	211,000	211,000
Loss / (gain)		228,000	260,000	457,000	546,000
Pension expense or non-pension postretirement benefit expense		1,584,000	1,597,000	3,169,000	3,315,000
Defined Benefit Plan, Contributions [Abstract]
Estimated employer contributions to defined benefit plans in remainder of 2012		4,700,000		4,700,000
Employer contributions made to defined benefit plans		1,000,000		1,400,000
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		367,000	306,000	735,000	679,000
Interest cost		856,000	891,000	1,713,000	1,816,000
Amortization of unrecognized:
Prior service cost		106,000	106,000	211,000	211,000
Loss / (gain)		229,000	264,000	458,000	554,000
Pension expense or non-pension postretirement benefit expense		1,558,000	1,567,000	3,117,000	3,260,000
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		1,000	1,000	1,000	1,000
Interest cost		26,000	33,000	52,000	62,000
Amortization of unrecognized:
Prior service cost		0	0	0	0
Loss / (gain)		(1,000)	(4,000)	(1,000)	(8,000)
Pension expense or non-pension postretirement benefit expense		$ 26,000	$ 30,000	$ 52,000	$ 55,000