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Stockholders' Equity - Common Stock Dividends and Reconciliation of Outstanding Common Shares (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |  | 1 Months Ended | 3 Months Ended
--- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2022 | Jan. 31, 2022 | Jun. 30, 2021 | Feb. 29, 2020 | Mar. 31, 2022 | Mar. 31, 2021
Common stock share repurchase disclosures |  |  |  |  |  |  |
Amount of forward contract recorded in additional paid in capital |  |  |  |  |  | $ 140.0 |
Common stock |  |  |  |  |  |  |
Common Stock Dividends |  |  |  |  |  |  |
Dividends declared per common share (in dollars per share) |  |  |  |  |  | $ 0.64 | $ 0.56
Reconciliation of Outstanding Common Shares |  |  |  |  |  |  |
Outstanding shares at beginning of period |  |  | 261.7 |  |  | 261.7 | 273.3
Shares issued |  |  |  |  |  | 1.7 | 1.4
Treasury stock acquired |  |  |  |  |  | (11.2) | (2.2)
Outstanding shares at end of period | 252.2 | 252.2 |  |  |  | 252.2 | 272.5
Common stock share repurchase disclosures |  |  |  |  |  |  |
Share repurchase program, maximum authorized amount (in dollars) |  |  | $ 1,600.0 | $ 1,200.0 | $ 900.0 |  |
Remaining share repurchase program authorized amount | $ 1,800.0 | $ 1,800.0 |  |  |  | $ 1,800.0 |
Common stock | March 2022 Accelerated Share Repurchase Program |  |  |  |  |  |  |
Common stock share repurchase disclosures |  |  |  |  |  |  |
Share repurchase program, maximum authorized amount (in dollars) | 700.0 | $ 700.0 |  |  |  |  |
Number of shares repurchased |  | 8.5 |  |  |  |  |
Initial cost of shares repurchased | $ 560.0 | $ 560.0 |  |  |  | $ 560.0 |
Amount of forward contract recorded in additional paid in capital |  | $ 140.0 |  |  |  |  |
Cap on number of shares to be settled as consideration |  | 21.4 |  |  |  |  |

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- Definition Number of shares repurchased in the accelerated share repurchase program. + References No definition available. + Details
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- Definition The value of a forward purchase contract reported in additional paid-in capital. + References No definition available. + 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 http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653 + Details
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