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Retirement Benefits (Schedule of Fair Value Disclosures) (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | $ 16,416.0 | $ 14,579.0 | $ 12,858.0
Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 3,361.4 | 3,227.0 | $ 2,768.2
U.S. | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 1,325.4 | 737.6 |
U.S. | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 124.7 | 68.3 |
International | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 2,722.7 | 2,635.8 |
International | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 180.6 | 162.3 |
Developed markets | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 4,496.0 | 4,301.3 |
Developed markets | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 102.2 | 101.5 |
Developed markets - repurchase agreements | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | (1,376.2) | (1,670.8) |
Emerging markets | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 611.0 | 631.0 |
Emerging markets | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 51.6 | 53.5 |
Hedge funds | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 3,046.8 | 2,661.3 |
Hedge funds | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 275.4 | 229.7 |
Equity-like funds | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 3,816.4 | 2,844.7 |
Equity-like funds | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 317.8 | 223.4 |
Cash value of trust owned insurance contract | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 2,166.8 | 2,204.6 |
Real estate | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 630.3 | 558.9 |
Real estate | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 36.2 | 25.8 |
Other | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 1,143.6 | 1,879.2 |
Other | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 106.1 | 157.9 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 1,728.4 | 1,915.5 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 147.5 | 141.7 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 430.4 | 476.1 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 40.9 | 45.0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | International | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 815.0 | 1,102.3 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | International | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 47.7 | 58.1 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Developed markets | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 2.6 | 2.9 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Developed markets | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Developed markets - repurchase agreements | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Emerging markets | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 11.3 | 14.2 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Emerging markets | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Hedge funds | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Hedge funds | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity-like funds | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 2.1 | 0.0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity-like funds | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash value of trust owned insurance contract | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Real estate | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 363.8 | 259.6 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Real estate | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 34.5 | 24.5 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 103.2 | 60.4 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 24.4 | 14.1 |
Significant Other Observable Inputs (Level 2) | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 2,501.7 | 2,079.2 |
Significant Other Observable Inputs (Level 2) | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 2,290.0 | 2,331.4 |
Significant Other Observable Inputs (Level 2) | U.S. | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.1 | 0.0 |
Significant Other Observable Inputs (Level 2) | U.S. | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Significant Other Observable Inputs (Level 2) | International | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Significant Other Observable Inputs (Level 2) | International | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Significant Other Observable Inputs (Level 2) | Developed markets | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 3,356.6 | 3,179.2 |
Significant Other Observable Inputs (Level 2) | Developed markets | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 80.5 | 80.3 |
Significant Other Observable Inputs (Level 2) | Developed markets - repurchase agreements | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | (1,376.2) | (1,670.8) |
Significant Other Observable Inputs (Level 2) | Emerging markets | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 250.5 | 262.7 |
Significant Other Observable Inputs (Level 2) | Emerging markets | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 23.7 | 24.7 |
Significant Other Observable Inputs (Level 2) | Hedge funds | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Significant Other Observable Inputs (Level 2) | Hedge funds | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Significant Other Observable Inputs (Level 2) | Equity-like funds | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Significant Other Observable Inputs (Level 2) | Equity-like funds | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Significant Other Observable Inputs (Level 2) | Cash value of trust owned insurance contract | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 2,166.8 | 2,204.6 |
Significant Other Observable Inputs (Level 2) | Real estate | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 7.5 | 6.9 |
Significant Other Observable Inputs (Level 2) | Real estate | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.7 | 0.7 |
Significant Other Observable Inputs (Level 2) | Other | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 263.2 | 301.2 |
Significant Other Observable Inputs (Level 2) | Other | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 18.3 | 21.1 |
Significant Unobservable Inputs (Level 3) | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 15.4 | 41.8 |
Significant Unobservable Inputs (Level 3) | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 1.5 | 4.0 |
Significant Unobservable Inputs (Level 3) | U.S. | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 1.2 | 1.0 |
Significant Unobservable Inputs (Level 3) | U.S. | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.1 | 0.1 |
Significant Unobservable Inputs (Level 3) | International | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Significant Unobservable Inputs (Level 3) | International | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Significant Unobservable Inputs (Level 3) | Developed markets | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Significant Unobservable Inputs (Level 3) | Developed markets | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Significant Unobservable Inputs (Level 3) | Developed markets - repurchase agreements | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Significant Unobservable Inputs (Level 3) | Emerging markets | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.1 | 0.1 |
Significant Unobservable Inputs (Level 3) | Emerging markets | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Significant Unobservable Inputs (Level 3) | Hedge funds | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Significant Unobservable Inputs (Level 3) | Hedge funds | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Significant Unobservable Inputs (Level 3) | Equity-like funds | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 5.5 | 16.9 |
Significant Unobservable Inputs (Level 3) | Equity-like funds | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.5 | 1.6 |
Significant Unobservable Inputs (Level 3) | Cash value of trust owned insurance contract | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Significant Unobservable Inputs (Level 3) | Real estate | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 10.7 | 5.8 |
Significant Unobservable Inputs (Level 3) | Real estate | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 1.0 | 0.6 |
Significant Unobservable Inputs (Level 3) | Other | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | (2.1) | 18.0 |
Significant Unobservable Inputs (Level 3) | Other | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | (0.1) | 1.7 |
Investments Valued at Net Asset Value | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 12,170.5 | 10,542.5 |
Investments Valued at Net Asset Value | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 922.4 | 749.9 |
Investments Valued at Net Asset Value | U.S. | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 893.7 | 260.5 |
Investments Valued at Net Asset Value | U.S. | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 83.7 | 23.2 |
Investments Valued at Net Asset Value | International | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 1,907.7 | 1,533.5 |
Investments Valued at Net Asset Value | International | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 132.9 | 104.2 |
Investments Valued at Net Asset Value | Developed markets | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 1,136.8 | 1,119.2 |
Investments Valued at Net Asset Value | Developed markets | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 21.7 | 21.2 |
Investments Valued at Net Asset Value | Developed markets - repurchase agreements | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Investments Valued at Net Asset Value | Emerging markets | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 349.1 | 354.0 |
Investments Valued at Net Asset Value | Emerging markets | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 27.9 | 28.8 |
Investments Valued at Net Asset Value | Hedge funds | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 3,046.8 | 2,661.3 |
Investments Valued at Net Asset Value | Hedge funds | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 275.4 | 229.7 |
Investments Valued at Net Asset Value | Equity-like funds | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 3,808.8 | 2,827.8 |
Investments Valued at Net Asset Value | Equity-like funds | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 317.3 | 221.8 |
Investments Valued at Net Asset Value | Cash value of trust owned insurance contract | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Investments Valued at Net Asset Value | Real estate | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 248.3 | 286.6 |
Investments Valued at Net Asset Value | Real estate | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
Investments Valued at Net Asset Value | Other | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | 779.3 | 1,499.6 |
Investments Valued at Net Asset Value | Other | Retiree Health Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Line Items] |  |  |
Fair value of plan assets | $ 63.5 | $ 121.0 |

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