Revenue Recognition and Related Party Revenue Other Related Party Matters (Details) $ in Millions	6 Months Ended
Jun. 30, 2020 USD ($)
Necessity Retail Partners
Related Party Transaction [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 190
Guarantee Obligations Expected Exposure	50
Grocery Retail Partners I
Related Party Transaction [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 175

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=118943654&loc=d3e12069-110248

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