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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] |  |  |  |
Tax expense (benefit) on cash flow hedges reclassified from AOCI to net income | $ (1) | $ 1 | $ (2) | $ 3
Tax expense (benefit) of unrealized gains/losses on available for sale securities still held | 6 | 3 | 2 | 6
Tax expense (benefit) on available for sale securities reclassified from AOCI to net income | 0 | (1) | 1 | 1
Tax expense (benefit) of defined benefit pension and other benefits plans | 0 | (1) | 0 | (16)
Tax expense (benefit) of defined benefit pension and other benefits plans reclassified from AOCI to net income | (1) | 0 | (1) | (1)
Tax expense (benefit) of other comprehensive income (loss) related to equity method investees | 0 | 1 | 0 | 0
Tax benefit of disposal of a business | $ 0 | $ 0 | $ (19) | $ 0

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- Definition Amount, before adjustment, of tax expense (benefit) for unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes tax expense (benefit) for unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e640-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580 + Details
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