Annual report pursuant to Section 13 and 15(d)

Retirement Benefits - Pension Plans and Defined Contribution Plans (Details)

v3.8.0.1
Retirement Benefits - Pension Plans and Defined Contribution Plans (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 03, 2016
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2015
Cash Flows        
Cash contribution to defined benefit retirement plans $ 80.0 $ 90.6 $ 15.5 $ 15.4
Defined Contribution Plans        
Employer's contribution to defined contribution plans (as a percent)   4.00%    
Expenses related to defined contribution plans   $ 11.4 9.9 9.1
Minimum        
Defined Contribution Plans        
Contribution vesting period   0 years    
Maximum        
Defined Contribution Plans        
Employer's matching contribution to defined contribution plans (as a percent)   6.00%    
Contribution vesting period   5 years    
Other Postretirement Benefit Plan [Member]        
Fair Value Measurements        
Other Postretirement Benefit Expense   $ 0.3 0.3 0.3
Cash Flows        
Estimated cash contribution to defined benefit retirement plans   0.8    
Pension Plans Defined Benefit        
Cash Flows        
Cash contribution to defined benefit retirement plans   89.6 14.6 14.9
Pension Plans Defined Benefit | Minimum        
Cash Flows        
Estimated cash contribution to defined benefit retirement plans   9.9    
U.S. Pension Benefits        
Fair Value Measurements        
Fair value of plan assets   262.4 173.7 158.9
Estimated Future Benefit Payments        
2017   12.9    
2018   13.4    
2019   14.1    
2020   14.8    
2021   15.4    
2023 - 2027   82.4    
Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   31.4 29.7 $ 29.5
Estimated Future Benefit Payments        
2017   8.0    
2018   7.7    
2019   7.9    
2020   7.2    
2021   7.3    
2023 - 2027   34.4    
Level 1 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   27.5 26.1  
Level 2 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   1.9 1.6  
Level 3 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   2.0 2.0  
Cash equivalents | Level 1 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   5.2 4.1  
Cash equivalents | Level 2 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   0.0 0.0  
Cash equivalents | Level 3 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   0.0 0.0  
Equity securities | Level 1 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   6.8 6.5  
Equity securities | Level 2 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   0.0 0.0  
Equity securities | Level 3 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   0.0 0.0  
Government index funds | Level 1 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   5.7 5.8  
Government index funds | Level 2 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   0.0 0.0  
Government index funds | Level 3 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   0.0 0.0  
Corporate bond funds | Level 1 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   9.8 9.7  
Corporate bond funds | Level 2 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   0.0 0.0  
Corporate bond funds | Level 3 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   0.0 0.0  
Real estate and real estate funds | Level 1 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   0.0 0.0  
Real estate and real estate funds | Level 2 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   0.0 0.0  
Real estate and real estate funds | Level 3 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   2.0 2.0  
Other | Level 1 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   0.0 0.0  
Other | Level 2 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   1.9 1.6  
Other | Level 3 | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   0.0 0.0  
Estimate of Fair Value Measurement [Member] | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   31.4 29.7  
Estimate of Fair Value Measurement [Member] | Cash equivalents | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   5.2 4.1  
Estimate of Fair Value Measurement [Member] | Equity securities | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   6.8 6.5  
Estimate of Fair Value Measurement [Member] | Government index funds | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   5.7 5.8  
Estimate of Fair Value Measurement [Member] | Corporate bond funds | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   9.8 9.7  
Estimate of Fair Value Measurement [Member] | Real estate and real estate funds | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   2.0 2.0  
Estimate of Fair Value Measurement [Member] | Other | Non-U.S. Pension Plans        
Fair Value Measurements        
Fair value of plan assets   $ 1.9 $ 1.6