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Segments and Related Information - Narrative (Details) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2021 USD ($) segment | Jun. 30, 2020
Segment Reporting [Abstract] |  |
Number of reportable segments | segment | 3 |
Segment Reporting Information [Line Items] |  |
Revenue, remaining performance obligation | $ | $ 158 |
Revenue, remaining performance obligation, percentage of obligations, remaining fiscal year | 33.00% |
Revenue, remaining performance obligation, percentage of obligations, remaining in year two | 33.00% |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01 |  |
Segment Reporting Information [Line Items] |  |
Revenue, remaining performance obligation, expected timing of satisfaction, period | 1 year |
Transferred over Time |  |
Segment Reporting Information [Line Items] |  |
Revenue from contract with customer, percentage of revenue | 61.00% | 63.00%

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- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045 + Details
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