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v3.23.1

Shareholders' equity - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions |  |  | 3 Months Ended | 20 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 14, 2022 | Jan. 24, 2022 | Apr. 29, 2023 | Apr. 30, 2022 | Apr. 29, 2023 | Mar. 31, 2023 | Jan. 28, 2023 | Jan. 21, 2022
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Amount of preferred dividends in arrears |  |  | $ 0 | $ 0 |  |  |  |
Amount repurchased |  |  | 39,100,000 | 268,200,000 |  |  |  |
Accelerated share repurchases, total value committed to repurchase |  |  |  |  |  |  |  | $ 250,000,000
Accelerated share repurchases, payment |  | $ 250,000,000 |  |  |  |  |  |
Treasury stock, shares, acquired (in shares) | 0.8 | 2.5 |  |  |  |  |  |
Accelerated share repurchases, initial price paid per share (usd per share) |  | $ 80 |  |  |  |  |  |
Accelerated share repurchases, prepayment amount, percent paid up front |  | 80.00% |  |  |  |  |  |
Accelerated share repurchases, prepayment amount, percent to be paid upon final settlement | 20.00% |  |  |  |  |  |  |
2017 Program |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  |  | $ 1,700,000,000 |
Remaining authorized repurchase amount |  |  | 761,200,000 |  | $ 761,200,000 | $ 775,000,000 | $ 537,300,000 |
Amount repurchased |  |  | $ 39,100,000 | $ 318,200,000 | $ 1,200,000,000 |  |  |

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- Definition The price paid per share to immediately purchase the targeted number of shares on the date of executing the accelerated share repurchase agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 25 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653 + Details
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- Definition Amount of cash receipt from (payment to) bank; or stock received from (issuance to) bank in the settlement of the accelerated share repurchase agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 25 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653 + Details
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- Definition Aggregate amount of cumulative preferred dividends in arrears. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21488-112644 + Details
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