Discontinued Operations	12 Months Ended
Dec. 31, 2020
Discontinued Operations And Disposal Groups [Abstract]
Discontinued Operations	NOTE 4. Discontinued Operations On August 31, 2018, we sold our Mode subsidiary. Results associated with Mode are classified as income from discontinued operations, net of income taxes, in our Consolidated Statements of Income for the year ended December 31, 2018. Proceeds from the sale of Mode have been presented in the Consolidated Statements of Cash Flows under investing activities for the year ended December 31, 2018. The reported operating cash used of $4.3 million and investing cash flows of $245.3 million from discontinued operations exclude the effect of income taxes.

The entire disclosure related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-URI http://asc.fasb.org/topic&trid=2155823

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-URI http://asc.fasb.org/subtopic&trid=2122178

Name:	us-gaap_DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration