Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

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

Derivative Financial Instruments - Narrative (Details) - Cash flow hedging - Designated as hedging instrument $ in Millions	Jun. 20, 2018 USD ($) derivative	Sep. 08, 2018 USD ($)	Feb. 24, 2018 USD ($)
Interest rate swaps
Derivative [Line Items]
Aggregate notional amounts of interest swaps		$ 3,110.0	$ 3,052.0
Number of derivative instruments entered \| derivative	2
Interest rate swaps \| Other Current Liabilities
Derivative [Line Items]
Fair value of interest rate swap liability		$ 1.6	$ 13.0
Interest rate swap, one
Derivative [Line Items]
Aggregate notional amounts of interest swaps	$ 339.0
Interest rate swap, two
Derivative [Line Items]
Aggregate notional amounts of interest swaps	$ 254.0