Retirement Benefit Plans - Target Allocation (Details) - U.S. Plans [Member]	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Target assets allocation and actual asset allocations for US pension plan assets
Actual Asset Allocation	100.00%	100.00%
Equity securities [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Actual Asset Allocation	12.00%	15.00%
Debt Securities [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Actual Asset Allocation	78.00%	63.00%
Other Investments [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Actual Asset Allocation	10.00%	22.00%
Minimum [Member] \| Equity securities [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Current Target Allocation	6.00%
Minimum [Member] \| Debt Securities [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Current Target Allocation	70.00%
Minimum [Member] \| Other Investments [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Current Target Allocation	7.00%
Maximum [Member] \| Equity securities [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Current Target Allocation	12.00%
Maximum [Member] \| Debt Securities [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Current Target Allocation	90.00%
Maximum [Member] \| Other Investments [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Current Target Allocation	15.00%

Defined benefit plan target and weighted average asset allocations for US pension plans.

No definition available.

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- Definition

Target allocation of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)(i)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

+ Details

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- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

+ Details

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