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Shareholders' Equity | 3 Months Ended
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Mar. 31, 2021
Shareholders' Equity [Abstract] |
Shareholders' Equity | 7. Shareholders’ Equity Accumulated other comprehensive income (loss) The tables below present the changes in AOCI by component for the three months ended March 31, 2020 and 2021:
|  | Net Unrealized Gains (Losses) on Investments with an Allowance for Credit Losses |  |  | Net Unrealized Gains (Losses) on Other Investments |  |  | Unrealized Gains (Losses) on Cash Flow Hedges |  |  | Pension and Postretirement Benefits |  |  | Foreign Currency Translation |  |  | Total Accumulated Other Comprehensive Income (Loss) |
(In millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, January 1, 2020 |  | $ | - |  |  | $ | 918 |  |  | $ | (6 | ) |  | $ | (855 | ) |  | $ | (125 | ) |  | $ | (68 | )
Other comprehensive income (loss) before reclassifications, after tax of $13, $287, $6, $0 and $0 |  |  | (48 | ) |  |  | (1,066 | ) |  |  | (19 | ) |  |  | 1 |  |  |  | (84 | ) |  |  | (1,216 | )
Reclassification of losses from accumulated other comprehensive income, after tax of $(10), $(6), $0, $(3) and $0 |  |  | 37 |  |  |  | 22 |  |  |  |  |  |  |  | 13 |  |  |  |  |  |  |  | 72 |
Other comprehensive income (loss) |  |  | (11 | ) |  |  | (1,044 | ) |  |  | (19 | ) |  |  | 14 |  |  |  | (84 | ) |  |  | (1,144 | )
Amounts attributable to noncontrolling interests |  |  | 1 |  |  |  | 111 |  |  |  |  |  |  |  | (1 | ) |  |  | 8 |  |  |  | 119 |
Balance, March 31, 2020 |  | $ | (10 | ) |  | $ | (15 | ) |  | $ | (25 | ) |  | $ | (842 | ) |  | $ | (201 | ) |  | $ | (1,093 | )
Balance, January 1, 2021 |  | $ | - |  |  | $ | 1,563 |  |  | $ | (23 | ) |  | $ | (877 | ) |  | $ | (82 | ) |  | $ | 581 |
Other comprehensive income (loss) before reclassifications, after tax of $1, $154, $(2), $0 and $0 |  |  | (3 | ) |  |  | (593 | ) |  |  | 3 |  |  |  |  |  |  |  | 3 |  |  |  | (590 | )
Reclassification of (gains) losses from accumulated other comprehensive income, after tax of $(1), $8, $(1), $(2) and $0 |  |  | 3 |  |  |  | (34 | ) |  |  | 1 |  |  |  | 9 |  |  |  |  |  |  |  | (21 | )
Other comprehensive income (loss) |  |  | - |  |  |  | (627 | ) |  |  | 4 |  |  |  | 9 |  |  |  | 3 |  |  |  | (611 | )
Amounts attributable to noncontrolling interests |  |  |  |  |  |  | 66 |  |  |  |  |  |  |  | (1 | ) |  |  | (1 | ) |  |  | 64 |
Balance, March 31, 2021 |  | $ | - |  |  | $ | 1,002 |  |  | $ | (19 | ) |  | $ | (869 | ) |  | $ | (80 | ) |  | $ | 34 |
Amounts reclassified from AOCI shown above are reported in Net income (loss) as follows:
Major Category of AOCI | Affected Line Item
Net unrealized gains (losses) on investments with an allowance for credit losses, Net unrealized gains (losses) on investments with OTTI losses, and Net unrealized gains (losses) on other investments | Investment gains (losses)
Unrealized gains (losses) on cash flow hedges | Operating revenues and other, Interest expense and Operating expenses and other
Pension and postretirement benefits | Operating expenses and other
Treasury Stock Loews Corporation repurchased 5.6 million and 9.7 million shares of its common stock at an aggregate cost of $274 million and $445 million during the three months ended March 31, 2021 and 2020.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: 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(e)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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