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Retirement Benefits (Schedule of Components in Consolidated Balance Sheets) (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Amounts recognized in the consolidated balance sheet consisted of: |  |
Accrued retirement benefits | $ (4,094.5) | $ (3,698.2)
Defined Benefit Pension Plans |  |
Amounts recognized in the consolidated balance sheet consisted of: |  |
Other noncurrent assets | 299.6 | 163.3
Other current liabilities | (67.9) | (65.3)
Accrued retirement benefits | (3,878.2) | (3,491.0)
Accumulated other comprehensive (income) loss before income taxes | 6,530.9 | 6,195.0
Net amount recognized | 2,884.4 | 2,802.0
Retiree Health Benefit Plans |  |
Amounts recognized in the consolidated balance sheet consisted of: |  |
Other noncurrent assets | 1,697.0 | 1,381.3
Other current liabilities | (7.4) | (7.3)
Accrued retirement benefits | (216.3) | (207.2)
Accumulated other comprehensive (income) loss before income taxes | (526.7) | (348.0)
Net amount recognized | $ 946.6 | $ 818.8

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