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Segment Information - Reconciliation of Capital Expenditures (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Segment Reporting Information [Line Items] |  |  |  |
Capital expenditures | $ 47 | $ 36 | $ 138 | $ 220
Total segment capital expenditures |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Capital expenditures | 47 | 33 | 120 | 100
Corporate and discontinued operations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Capital expenditures | $ 0 | $ 3 | $ 18 | $ 120

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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585 + Details
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