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Income Taxes - U.S. Federal Statutory Income Tax Rate Reconciled to Effective Tax Rate (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Tax Disclosure [Abstract] |  |  |
Pre-Tax Income | $ 241 | $ 200 | $ 104
Tax Expense/(Benefit) |  |  |
U.S. federal statutory tax rate | 51 | 70 | 37
State income taxes, net of federal benefit | 18 | 10 | 4
Tax rate change | 0 | (40) | (1)
Nondeductible meals, entertainment and penalties | 1 | 1 | 4
Stock-based compensation | (9) | (15) | 1
Uncertain tax positions | 1 | 4 | 0
Tax credits | (4) | (3) | (1)
State and tax return to provision adjustment | (7) | (5) | (1)
Sec 199 benefits | 0 | (3) | 0
Other | (2) | 3 | 0
Total | $ 49 | $ 22 | $ 43
Percent of Pre-Tax Income (Loss) |  |  |
U.S. federal statutory tax rate | 21.00% | 35.00% | 35.00%
State income taxes, net of federal benefit | 8.00% | 5.00% | 4.00%
Tax rate change | 0.10% | (20.00%) | (1.00%)
Nondeductible meals, entertainment and penalties | 1.00% | 0.00% | 4.00%
Stock-based compensation | (4.00%) | (7.00%) | 1.00%
Uncertain tax positions | 0.00% | 2.00% | 0.00%
Tax credits | (2.00%) | (1.00%) | (1.00%)
State and tax return to provision adjustment | (3.00%) | (3.00%) | (1.00%)
Sec 199 benefits | (0.00%) | (1.00%) | (0.00%)
Other | (1.00%) | 1.00% | 0.00%
Total | 20.00% | 11.00% | 41.00%

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in income tax contingencies. Including, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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