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SHAREHOLDERS' EQUITY (DETAILS 2) - USD ($) | 5 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jan. 15, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 09, 2016
Accelerated Share Repurchase Agreement August 17 2015 [Member] |  |  |  |  |
Treasury Shares [Line Items] |  |  |  |  |
Total shares (in shares) | 5,507,758 | 1,358,380 | 4,149,378 |  |
Total cost |  |  | $ 300,000,000 |  |
Average price per share (in usd per share) | $ 54.47 |  |  |  |
Common Stock [Member] |  |  |  |  |
Treasury Shares [Line Items] |  |  |  |  |
Value of share repurchase authorized by the Board of Directors during the period |  |  |  |  | $ 1,000,000,000
Total shares (in shares) |  | 10,508,000 | 4,616,000 | 11,752,000 |
Total cost |  | $ 571,805,000 | $ 264,538,000 | $ 543,202,000 |
Average price per share (in usd per share) |  | $ 54.42 | $ 57.32 | $ 46.22 |
Common Stock [Member] | In the open market [Member] |  |  |  |  |
Treasury Shares [Line Items] |  |  |  |  |
Total shares (in shares) |  | 10,241,000 | 4,264,000 | 11,317,000 |
Total cost |  | $ 557,476,000 | $ 246,490,000 | $ 524,168,000 |
Average price per share (in usd per share) |  | $ 54.44 | $ 57.80 | $ 46.32 |
Common Stock [Member] | From employees [Member] |  |  |  |  |
Treasury Shares [Line Items] |  |  |  |  |
Total shares (in shares) |  | 267,000 | 352,000 | 435,000 |
Total cost |  | $ 14,329,000 | $ 18,048,000 | $ 19,034,000 |
Average price per share (in usd per share) |  | $ 53.74 | $ 51.34 | $ 43.82 |

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