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Restructuring - Summary of Restructuring Activities (Detail) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2017 | Oct. 01, 2016
Restructuring Reserve [Roll Forward] |  |
Accrual as of beginning of period | $ 74.0 |
2017 charges | 47.8 |
Utilization cash | (33.8) |
Utilization, Non-cash | (0.4) |
Accrual as of end of period | 87.6 |
Employee termination benefits |  |
Restructuring Reserve [Roll Forward] |  |
Accrual as of beginning of period | 69.4 |
2017 charges | 41.0 |
Utilization cash | (27.7) |
Utilization, Non-cash | 0.0 |
Accrual as of end of period | 82.7 |
Asset impairment charges |  |
Restructuring Reserve [Roll Forward] |  |
Accrual as of beginning of period | 0.0 |
2017 charges | 0.4 | $ 3.5
Utilization cash | 0.0 |
Utilization, Non-cash | (0.4) |
Accrual as of end of period | 0.0 |
Contract termination costs |  |
Restructuring Reserve [Roll Forward] |  |
Accrual as of beginning of period | 4.6 |
2017 charges | 1.5 |
Utilization cash | (1.2) |
Utilization, Non-cash | 0.0 |
Accrual as of end of period | 4.9 |
Other related costs |  |
Restructuring Reserve [Roll Forward] |  |
Accrual as of beginning of period | 0.0 |
2017 charges | 4.9 |
Utilization cash | (4.9) |
Utilization, Non-cash | 0.0 |
Accrual as of end of period | $ 0.0 |

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- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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