Basis Of Presentation (Narrative) (Details) $ in Millions	Oct. 01, 2020 USD ($)
Subsequent Event [Member] \| ServiceMaster Brands [Member] \| Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Basis Of Presentation [Line Items]
Sale of business, consideration received	$ 1,553

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

No definition available.

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