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Stockholders' Equity (Details) |  |  |  |  |  |  |  | 2 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 11, 2016 shares | May 09, 2016 USD ($) shares | Apr. 19, 2016 shares | Feb. 17, 2016 USD ($) shares | Jan. 19, 2016 shares | Nov. 12, 2015 USD ($) shares | Oct. 30, 2015 dividend $ / shares | Jul. 11, 2016 $ / shares shares | Apr. 19, 2016 $ / shares shares | Jan. 19, 2016 $ / shares shares | Sep. 30, 2016 USD ($) $ / shares | Dec. 31, 2015 $ / shares | Sep. 30, 2015 USD ($) | Aug. 20, 2014 USD ($) $ / shares
Stockholders' Equity Note [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Authorized repurchase amount | $ |  | $ 400,000,000 |  | $ 400,000,000 |  | $ 400,000,000 |  |  |  |  |  |  | $ 1,200,000,000 |
Authorized amount for accelerated stock repurchase program | $ |  | $ 400,000,000 |  | $ 400,000,000 |  | $ 400,000,000 |  |  |  |  |  |  |  |
Accelerated shares repurchased (shares) | shares | 1,104,162 | 3,964,812 | 861,235 | 4,222,193 | 970,609 | 4,140,788 |  | 5,068,974.000 | 5,083,428 | 5,111,397 |  |  |  |
Average price per share paid for stock repurchased for accelerated stock repurchases (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 78.91 | $ 78.69 | $ 78.26 |  |  |  |
Number of dividends declared | dividend |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Dividend declared (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 2.00 |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.01 | $ 0.01 |  | $ 0.01
Maximum price of common stock available to be issued | $ |  |  |  |  |  |  |  |  |  |  | $ 500,000,000 |  |  | $ 500,000,000
Commission to sales agent (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00%

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- Definition Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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