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Earnings Per Share - Buyback Activity by Program (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended | 28 Months Ended
--- | --- | --- | ---
Feb. 28, 2019 | Nov. 30, 2018 | Aug. 31, 2018 | Feb. 28, 2018 | Nov. 30, 2017 | Aug. 31, 2017 | Feb. 28, 2019 | Nov. 30, 2018
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |
Purchase Price | $ 100,095 | $ 368,661 | $ 139,468 | $ 1,353 | $ 657 | $ 35,040 |  |
Share Repurchase Programs |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |
Shares | 598 |  |  |  |  |  | 2,929 |
Avg. Price per Share (in dollars per share) | $ 167.32 |  |  |  |  |  | $ 186.63 |
Purchase Price | $ 100,000 |  |  |  |  |  | $ 546,582 |
August 2, 2016 |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |
Shares | 0 |  |  |  |  |  | 2,130 | 2,600
Avg. Price per Share (in dollars per share) | $ 0.00 |  |  |  |  |  | $ 192.55 | $ 188.82
Purchase Price | $ 0 |  |  |  |  |  | $ 410,003 | $ 500,000
October 30, 2018 |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |
Shares | 598 |  |  |  |  |  | 799 |
Avg. Price per Share (in dollars per share) | $ 167.32 |  |  |  |  |  | $ 170.87 |
Purchase Price | $ 100,000 |  |  |  |  |  | $ 136,579 |

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