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Schedule I - Condensed Financial Information of Parent (Balance Sheet Parenthetical) (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Parent Company |  |
Condensed Financial Statements, Captions [Line Items] |  |
Deferred financing costs, accumulated amortization | $ 4 | $ 2

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- Definition Amount of accumulated amortization of debt issuance costs classified as noncurrent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
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