Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4568740-111683

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4I
-URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4590271-111686

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4568447-111683

Name:	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

COMPREHENSIVE INCOME - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' equity	$ 5,133.0	$ 6,627.9	$ 8,125.9	$ 2,339.4
Foreign Currency Translation (Loss) Gain
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency tax adjustments	157.4	203.8	166.4
Stockholders' equity	(284.7)	(104.5)	$ (490.5)
Accumulated foreign currency adjustment, translation gain (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' equity	(172.9)	22.1
Accumulated foreign currency adjustment, net investments hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' equity	$ (111.8)	$ (126.6)