Retirement Benefits (Details 5) (USD $) | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2011 |
In Millions, unless otherwise specified |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | $3,367 | $3,213.30 | ' |
Fair Value, Inputs, Level 1 [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 1,217.10 | 1,168.90 | ' |
Fair Value, Inputs, Level 2 [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 1,968.60 | 1,864.10 | ' |
Fair Value, Inputs, Level 3 [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 181.3 | 180.3 | 169.8 |
Cash and Cash Equivalents [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 3.7 | 0.4 | ' |
Cash and Cash Equivalents [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 19 | 26.8 | ' |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 3.7 | 0.4 | ' |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 19 | 26.8 | ' |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Common stock [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 711.8 | 653.7 | ' |
Common stock [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 41.6 | 39.3 | ' |
Common stock [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 711.8 | 653.7 | ' |
Common stock [Member] | Fair Value, Inputs, Level 1 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 41.6 | 39.3 | ' |
Common stock [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Common stock [Member] | Fair Value, Inputs, Level 2 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Common stock [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Common stock [Member] | Fair Value, Inputs, Level 3 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Mutual funds [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 196.3 | 160 | ' |
Mutual funds [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 196.3 | 160 | ' |
Mutual funds [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Mutual funds [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Equity Common collective trusts [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 561.5 | 530.5 | ' |
Equity Common collective trusts [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 286.4 | 296.9 | ' |
Equity Common collective trusts [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Equity Common collective trusts [Member] | Fair Value, Inputs, Level 1 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Equity Common collective trusts [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 561.5 | 530.5 | ' |
Equity Common collective trusts [Member] | Fair Value, Inputs, Level 2 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 286.4 | 296.9 | ' |
Equity Common collective trusts [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Equity Common collective trusts [Member] | Fair Value, Inputs, Level 3 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Corporate debt [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 535.7 | 525.9 | ' |
Corporate debt [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 39.9 | 68.7 | ' |
Corporate debt [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Corporate debt [Member] | Fair Value, Inputs, Level 1 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Corporate debt [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 535.7 | 525.9 | ' |
Corporate debt [Member] | Fair Value, Inputs, Level 2 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 39.9 | 68.7 | ' |
Corporate debt [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Corporate debt [Member] | Fair Value, Inputs, Level 3 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
U.S. Government Securities [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 357 | 368.4 | ' |
U.S. Government Securities [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 240.8 | 287.9 | ' |
U.S. Government Securities [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 116.2 | 80.5 | ' |
U.S. Government Securities [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Non-U.S. Government securities [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 17.6 | 0.8 | ' |
Non-U.S. Government securities [Member] | Fair Value, Inputs, Level 1 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 3.9 | 0.8 | ' |
Non-U.S. Government securities [Member] | Fair Value, Inputs, Level 2 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 13.7 | ' | ' |
Non-U.S. Government securities [Member] | Fair Value, Inputs, Level 3 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Fixed income securities Common collective trusts [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 128.6 | 145.5 | ' |
Fixed income securities Common collective trusts [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 239 | 167.1 | ' |
Fixed income securities Common collective trusts [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Fixed income securities Common collective trusts [Member] | Fair Value, Inputs, Level 1 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Fixed income securities Common collective trusts [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 128.6 | 145.5 | ' |
Fixed income securities Common collective trusts [Member] | Fair Value, Inputs, Level 2 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 239 | 167.1 | ' |
Fixed income securities Common collective trusts [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Fixed income securities Common collective trusts [Member] | Fair Value, Inputs, Level 3 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Private equity [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 80.4 | 83.2 | ' |
Private equity [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Private equity [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Private equity [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 80.4 | 83.2 | 85 |
Alternative equity [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 42.1 | 53.4 | ' |
Alternative equity [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Alternative equity [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Alternative equity [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 42.1 | 53.4 | 49 |
Real estate [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 52.9 | 46.2 | ' |
Real estate [Member] | Fair Value, Inputs, Level 1 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Real estate [Member] | Fair Value, Inputs, Level 2 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 44.6 | 46.2 | ' |
Real estate [Member] | Fair Value, Inputs, Level 3 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 8.3 | 0 | 3.9 |
Insurance contracts [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 0.8 | 0.8 | ' |
Insurance contracts [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 45.5 | 38.5 | ' |
Insurance contracts [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Insurance contracts [Member] | Fair Value, Inputs, Level 1 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Insurance contracts [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Insurance contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Insurance contracts [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 0.8 | 0.8 | 0.9 |
Insurance contracts [Member] | Fair Value, Inputs, Level 3 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 45.5 | 38.5 | 26.9 |
Other [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 7.2 | 7.2 | ' |
Other [Member] | Fair Value, Inputs, Level 1 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | ' | ' | ' |
Other [Member] | Fair Value, Inputs, Level 2 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | 3 | 2.8 | ' |
Other [Member] | Fair Value, Inputs, Level 3 [Member] | Non-U.S. Pension Benefit Plans [Member] | ' | ' | ' |
Investments measured at fair value | ' | ' | ' |
Defined benefit plan fair value of plan assets | $4.20 | $4.40 | $4.10 |