Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Business Combination Transactions (Goodwill Allocation) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017	Jan. 16, 2017
Business Acquisition
Goodwill	$ 9,003.4	$ 8,929.8
FMCTI Merger
Business Acquisition
Goodwill			$ 5,180.7
FMCTI Merger \| Subsea
Business Acquisition
Goodwill			2,527.7
FMCTI Merger \| Onshore/Offshore
Business Acquisition
Goodwill			1,635.5
FMCTI Merger \| Surface Technologies
Business Acquisition
Goodwill			$ 1,017.5