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Other Comprehensive Income (Loss) | 3 Months Ended
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Mar. 31, 2021
Equity [Abstract] |
Other Comprehensive Income (Loss) | Other Comprehensive Income (Loss) Changes in AOCI by component are as follows:
| Three Months Ended March 31,
($ in millions) | Derivatives |  | Investments |  | Employee Benefit Plans |  | Cumulative Translation Adjustment |  | Accumulated Other Comprehensive Income (Loss)
Balance January 1, 2020, net of taxes | $ | 31 |  |  | $ | 18 |  |  | $ | (4,261) |  |  | $ | (1,981) |  |  | $ | (6,193) |
Other comprehensive income (loss) before reclassification adjustments, pretax | 178 |  |  | 3 |  |  | — |  |  | (333) |  |  | (152) |
Tax | (37) |  |  | — |  |  | 5 |  |  | (11) |  |  | (43) |
Other comprehensive income (loss) before reclassification adjustments, net of taxes | 141 |  |  | 3 |  |  | 5 |  |  | (344) |  |  | (195) |
Reclassification adjustments, pretax | (47) |  | (1) | (21) |  | (2) | 69 |  | (3) | — |  |  | 1 |
Tax | 10 |  |  | — |  |  | (14) |  |  | — |  |  | (4) |
Reclassification adjustments, net of taxes | (37) |  |  | (21) |  |  | 55 |  |  | — |  |  | (3) |
Other comprehensive income (loss), net of taxes | 104 |  |  | (18) |  |  | 60 |  |  | (344) |  |  | (198) |
Balance March 31, 2020, net of taxes | $ | 135 |  |  | $ | — |  |  | $ | (4,201) |  |  | $ | (2,325) |  |  | $ | (6,391) |
Balance January 1, 2021, net of taxes | $ | (266) |  |  | $ | — |  |  | $ | (4,540) |  |  | $ | (1,828) |  |  | $ | (6,634) |
Other comprehensive income (loss) before reclassification adjustments, pretax | 180 |  |  | — |  |  | (4) |  |  | (211) |  |  | (35) |
Tax | (38) |  |  | — |  |  | (1) |  |  | (88) |  |  | (127) |
Other comprehensive income (loss) before reclassification adjustments, net of taxes | 142 |  |  | — |  |  | (5) |  |  | (299) |  |  | (162) |
Reclassification adjustments, pretax | 111 |  | (1) | — |  |  | 87 |  | (3) | — |  |  | 198 |
Tax | (23) |  |  | — |  |  | (1) |  |  | — |  |  | (24) |
Reclassification adjustments, net of taxes | 88 |  |  | — |  |  | 86 |  |  | — |  |  | 174 |
Other comprehensive income (loss), net of taxes | 230 |  |  | — |  |  | 81 |  |  | (299) |  |  | 12 |
Balance March 31, 2021, net of taxes | $ | (36) |  |  | $ | — |  |  | $ | (4,459) |  |  | $ | (2,127) |  |  | $ | (6,622) |
(1) Primarily relates to foreign currency cash flow hedges that were reclassified from AOCI to Sales. (2) Represents net realized (gains) losses on the sales of available-for-sale debt securities that were reclassified from AOCI to Other (income) expense, net. (3) Includes net amortization of prior service cost and actuarial gains and losses included in net periodic benefit cost (see Note 10).

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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