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Retirement Benefits (Details) (USD $)
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3 Months Ended | 9 Months Ended | ||
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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Defined Benefit Pension Plans
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| Components of net periodic pension expense | ||||
| Company contributions | $ 11,000,000 | |||
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Defined Benefit Pension Plans | Minimum
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| Components of net periodic pension expense | ||||
| Expected future benefit payments | 20,000,000 | |||
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Defined Benefit Pension Plans | Maximum
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| Components of net periodic pension expense | ||||
| Expected future benefit payments | 40,000,000 | |||
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Defined Benefit U.S. Pension Plans
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| Components of net periodic pension expense | ||||
| Service cost | 1,613,000 | 1,489,000 | 4,840,000 | 4,468,000 |
| Interest cost | 7,275,000 | 8,323,000 | 21,825,000 | 24,970,000 |
| Expected return on assets | (7,744,000) | (8,830,000) | (23,232,000) | (26,492,000) |
| Amortization of prior service cost | 26,000 | (28,000) | 77,000 | (85,000) |
| Recognized net actuarial loss | 1,510,000 | 3,409,000 | 4,530,000 | 10,226,000 |
| Net periodic pension expense | 2,680,000 | 4,363,000 | 8,040,000 | 13,087,000 |
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Defined Benefit Non-U.S. Pension Plans
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| Components of net periodic pension expense | ||||
| Service cost | 3,809,000 | 1,921,000 | 11,505,000 | 5,815,000 |
| Interest cost | 7,989,000 | 8,070,000 | 23,925,000 | 24,518,000 |
| Expected return on assets | (11,527,000) | (10,369,000) | (34,507,000) | (31,446,000) |
| Recognized net actuarial loss | 1,683,000 | 786,000 | 5,058,000 | 2,352,000 |
| Net periodic pension expense | $ 1,954,000 | $ 408,000 | $ 5,981,000 | $ 1,239,000 |