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Shareholders' Equity (Details) - USD ($) | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Jul. 31, 2017 | Apr. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Apr. 28, 2017
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Dividend declared (in dollars per share) |  |  | $ 0.48 | $ 0.48 | $ 0.48 | $ 0.375 | $ 0.375 | $ 0.375 |
Common stock, dividends, cash paid (in dollars per share) |  | $ 0.48 |  |  |  | $ 0.375 | 0.375 |  |
Common stock, dividends, cash paid for dividends declared in prior period (in dollars per share) |  |  |  | $ 0.48 |  |  | $ 0.375 |  |
Common stock repurchase program, authorized amount |  |  |  |  |  |  |  |  | $ 500,000,000
Subsequent Event |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Common stock, dividends, cash paid (in dollars per share) | $ 0.48 |  |  |  |  |  |  |  |

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=27012166&loc=d3e187085-122770 + Details
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