Retirement Benefits	12 Months Ended
Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Retirement Benefits Disclosure	25. Retirement benefits The Company makes contributions to defined contribution retirement plans that together cover substantially all employees. The level of the Company's contribution is fixed at a set percentage of each employee's pay. Company contributions to personal defined contribution pension plans totaled $52.3 million, $49.8 million and $45.7 million for the years to December 31, 2015, 2014 and 2013, respectively, and were charged to operations as they became payable.

The entire disclosure for pension and other postretirement benefits.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=49170332&loc=SL14450702-114947

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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