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Restructuring - Summary of Restructuring Activities (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 30, 2019 | Mar. 31, 2018
Restructuring Reserve [Roll Forward] |  |
Accrual as of beginning of period | $ 108.7 |
2019 charges | 54.3 |
Utilization cash | (27.9) |
Utilization, non-cash | (2.1) |
Accrual as of end of period | 133.0 |
Employee termination benefits |  |
Restructuring Reserve [Roll Forward] |  |
Accrual as of beginning of period | 103.3 |
2019 charges | 49.1 |
Utilization cash | (25.5) |
Utilization, non-cash | 0.0 |
Accrual as of end of period | 126.9 |
Asset impairment charges |  |
Restructuring Reserve [Roll Forward] |  |
Accrual as of beginning of period | 0.0 |
2019 charges | 2.1 | $ 0.9
Utilization cash | 0.0 |
Utilization, non-cash | (2.1) |
Accrual as of end of period | 0.0 |
Contract termination costs |  |
Restructuring Reserve [Roll Forward] |  |
Accrual as of beginning of period | 5.4 |
2019 charges | 1.5 |
Utilization cash | (0.8) |
Utilization, non-cash | 0.0 |
Accrual as of end of period | 6.1 |
Other related costs |  |
Restructuring Reserve [Roll Forward] |  |
Accrual as of beginning of period | 0.0 |
2019 charges | 1.6 |
Utilization cash | (1.6) |
Utilization, non-cash | 0.0 |
Accrual as of end of period | $ 0.0 |

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