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Segment Reporting - Segment Result and Reconciliations to GAAP - Core Earnings Adjustments (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Net interest income (loss) after provisions for loan losses | $ 225 | $ 186 | $ 435 | $ 427
Total other income (loss) | 222 | 136 | 441 | 348
Goodwill and acquired intangible asset impairment and amortization | 11 | 6 | 18 | 16
Income tax expense (benefit) | 41 | 30 | 78 | 64
Net income (loss) | 153 | 83 | 281 | 210
Total Adjustments [Member] | Adjustments [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Net interest income (loss) after provisions for loan losses | (3) | (21) | (17) | (23)
Total other income (loss) | (20) | (30) | (11) | 3
Goodwill and acquired intangible asset impairment and amortization | 11 | 6 | 18 | 16
Total Core Earnings adjustments to GAAP | (34) | (57) | (46) | (36)
Income tax expense (benefit) | (12) | (9) | (15) | (8)
Net income (loss) | (22) | (48) | (31) | (28)
Net Impact of Derivative Accounting [Member] | Total Adjustments [Member] | Adjustments [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Net interest income (loss) after provisions for loan losses | (3) | (21) | (17) | (23)
Total other income (loss) | (20) | (30) | (11) | 3
Total Core Earnings adjustments to GAAP | (23) | (51) | (28) | (20)
Net Impact of Goodwill and Acquired Intangible Assets [Member] | Total Adjustments [Member] | Adjustments [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Goodwill and acquired intangible asset impairment and amortization | 11 | 6 | 18 | 16
Total Core Earnings adjustments to GAAP | $ (11) | $ (6) | $ (18) | $ (16)

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Also includes the amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References No definition available. + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324 + Details
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- Definition Amount of interest income or expense, including any amortization and accretion (as applicable) of discounts and premiums, including consideration of the provisions for loan, lease, credit, and other related losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.12) -URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260 + Details
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