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Accumulated Other Comprehensive Earnings (Loss) (Balance sheets and Statements of equity) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | $ 4,148.3 | $ 6,393.0 | $ 14,732.0
Other comprehensive earnings (loss) | 482.1 | (1,024.0) | 1,944.8
Impact of the Split-off Transaction |  |  | 85.3
Ending balance | 13,198.6 | 4,148.3 | 6,393.0
Foreign currency translation adjustments |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | 719.3 | 1,726.6 | (272.6)
Other comprehensive earnings (loss) | 490.3 | (1,007.3) | 1,942.8
Impact of the Split-off Transaction |  |  | 56.4
Ending balance | 1,209.6 | 719.3 | 1,726.6
Pension- related adjustments and other |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | (87.5) | (70.6) | (99.8)
Other comprehensive earnings (loss) | (9.4) | (16.9) | 0.3
Impact of the Split-off Transaction |  |  | 28.9
Ending balance | (96.9) | (87.5) | (70.6)
Accumulated other comprehensive earnings (loss) |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | 631.8 | 1,656.0 | (372.4)
Other comprehensive earnings (loss) | 480.9 | (1,024.2) | 1,943.1
Impact of the Split-off Transaction |  |  | 85.3
Ending balance | 1,112.7 | 631.8 | 1,656.0
Noncontrolling interests |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | (4.0) | (4.2) | (5.9)
Other comprehensive earnings (loss) | 1.2 | 0.2 | 1.7
Impact of the Split-off Transaction |  |  | 0.0
Ending balance | (2.8) | (4.0) | (4.2)
Total accumulated other comprehensive earnings (loss) |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | 627.8 | 1,651.8 | (378.3)
Ending balance | $ 1,109.9 | $ 627.8 | $ 1,651.8

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