Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Basis of Presentation (Narrative) (Details)	Jun. 30, 2021 business_unit segment	Jan. 01, 2021 segment	Dec. 31, 2020 segment
Segment Reporting Information [Line Items]
Core business segments, number \| segment	2	2	3
Government Solutions
Segment Reporting Information [Line Items]
Number of business units \| business_unit	4