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Subsequent Events Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |  | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Feb. 01, 2018 | Feb. 07, 2018 | Dec. 30, 2017 | Dec. 30, 2017
Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Shares repurchased (in shares) |  | 1.1 |  |
Shares repurchased, price per share (in dollars per share) |  | $ 8.78 |  |
Convertible Notes | 2033 Notes |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Principal amount of debt repurchased |  |  | $ 12.5 | $ 159.0
Cash paid for repurchase of debt |  |  | $ 13.0 | $ 175.0
Convertible Notes | 2033 Notes | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Principal amount of debt repurchased |  | $ 22.5 |  |
Cash paid for repurchase of debt |  | $ 23.1 |  |
Cobham [Member] | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Cash consideration | $ 455.0 |  |  |

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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 + Details
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