XML 107 R104.htm IDEA: XBRL DOCUMENT v3.19.3
Retirement Benefits - Schedule of Allocation of Plan Assets (Details) - USD ($)
$ in Millions
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets $ 3,753.1 $ 3,754.8  
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 100.8 84.6 $ 77.2
U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 2,781.3 2,827.3  
Defined benefit plan, fair value of plan assets excluding those measured using the NAV practical expedient 2,724.1 2,729.7  
U.S. Plans | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 1,337.1 1,431.7  
U.S. Plans | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 1,386.1 1,297.1  
U.S. Plans | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.9 0.9  
U.S. Plans | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 2.6 2.0  
U.S. Plans | Cash and cash equivalents | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 2.6 2.0  
U.S. Plans | Cash and cash equivalents | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
U.S. Plans | Cash and cash equivalents | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
U.S. Plans | Mutual funds      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 129.7 222.1  
U.S. Plans | Mutual funds | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 129.7 222.1  
U.S. Plans | Mutual funds | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
U.S. Plans | Mutual funds | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
U.S. Plans | Common stock      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 919.7 964.7  
U.S. Plans | Common stock | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 919.7 964.7  
U.S. Plans | Common stock | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
U.S. Plans | Common stock | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
U.S. Plans | Common collective trusts      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 419.0 422.2  
U.S. Plans | Common collective trusts | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0    
U.S. Plans | Common collective trusts | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 419.0 422.2  
U.S. Plans | Common collective trusts | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
U.S. Plans | Corporate debt      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 698.7 627.7  
U.S. Plans | Corporate debt | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
U.S. Plans | Corporate debt | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 698.7 627.7  
U.S. Plans | Corporate debt | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
U.S. Plans | Government securities      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 415.1 348.7  
U.S. Plans | Government securities | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 285.1 242.9  
U.S. Plans | Government securities | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 130.0 105.8  
U.S. Plans | Government securities | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
U.S. Plans | Common collective trusts      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 138.4 141.4  
U.S. Plans | Common collective trusts | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
U.S. Plans | Common collective trusts | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 138.4 141.4  
U.S. Plans | Common collective trusts | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
U.S. Plans | Insurance contracts      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.9 0.9  
U.S. Plans | Insurance contracts | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
U.S. Plans | Insurance contracts | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
U.S. Plans | Insurance contracts | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.9 0.9 0.9
U.S. Plans | Private equity | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 31.6 36.5  
U.S. Plans | Alternative equity | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 25.6 61.1  
Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, fair value of plan assets excluding those measured using the NAV practical expedient 961.7 917.7  
Non-U.S. Plans | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 81.3 73.1  
Non-U.S. Plans | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 780.5 760.9  
Non-U.S. Plans | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 99.9 83.7  
Non-U.S. Plans | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 971.8 927.5  
Non-U.S. Plans | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 16.6 12.8  
Non-U.S. Plans | Cash and cash equivalents | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 16.6 12.8  
Non-U.S. Plans | Cash and cash equivalents | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
Non-U.S. Plans | Cash and cash equivalents | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
Non-U.S. Plans | Common stock      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 63.4 59.2  
Non-U.S. Plans | Common stock | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 63.4 59.2  
Non-U.S. Plans | Common stock | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
Non-U.S. Plans | Common stock | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
Non-U.S. Plans | Common collective trusts      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 304.5 320.7  
Non-U.S. Plans | Common collective trusts | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
Non-U.S. Plans | Common collective trusts | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 304.5 320.7  
Non-U.S. Plans | Common collective trusts | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
Non-U.S. Plans | Corporate debt      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 61.2 33.8  
Non-U.S. Plans | Corporate debt | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
Non-U.S. Plans | Corporate debt | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 61.2 33.8  
Non-U.S. Plans | Corporate debt | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
Non-U.S. Plans | Government securities      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 1.3 16.6  
Non-U.S. Plans | Government securities | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 1.3 1.1  
Non-U.S. Plans | Government securities | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets   15.5  
Non-U.S. Plans | Government securities | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
Non-U.S. Plans | Common collective trusts      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 329.7 310.4  
Non-U.S. Plans | Common collective trusts | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
Non-U.S. Plans | Common collective trusts | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 329.7 310.4  
Non-U.S. Plans | Common collective trusts | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
Non-U.S. Plans | Real estate funds      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 85.1 80.5  
Non-U.S. Plans | Real estate funds | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
Non-U.S. Plans | Real estate funds | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 85.1 80.5  
Non-U.S. Plans | Real estate funds | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 10.1 9.8  
Non-U.S. Plans | Insurance contracts      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 95.4 79.1  
Non-U.S. Plans | Insurance contracts | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
Non-U.S. Plans | Insurance contracts | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
Non-U.S. Plans | Insurance contracts | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 95.4 79.1 71.5
Non-U.S. Plans | Other      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 4.5 4.6  
Non-U.S. Plans | Other | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
Non-U.S. Plans | Other | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets 0.0 0.0  
Non-U.S. Plans | Other | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan fair value of plan assets $ 4.5 $ 4.6 $ 4.8