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Business And Summary Of Significant Accounting Policies (Narrative) (Details) $ in Millions |  | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 28, 2019 | Dec. 31, 2019 USD ($) Business | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jan. 01, 2020 USD ($) | Nov. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Jan. 31, 2019 USD ($) | Jan. 01, 2019 USD ($) | Jan. 01, 2018 USD ($)
Number of segments | Business |  | 3 |  |  |  |  |  |  |  |
Charges associated with doubtful accounts |  | $ 30.0 | $ 31.0 | $ 27.0 |  |  |  |  |  |
Net aggregate financing receivables |  | 244.0 | 217.0 |  |  |  |  |  |  |
Payments for purchases of investments |  | 241.0 | 145.9 | $ 0.0 |  |  |  |  |  |
Payments to purchase investments, investments in partnership |  | 189.0 | $ 86.0 |  |  |  |  |  |  |
Operating lease ROU assets |  | 763.7 |  |  |  |  |  |  |  |
Operating lease liabilities |  | 796.9 |  |  |  |  |  |  |  |
Foreign currency contracts | Net investment hedging |  |  |  |  |  |  |  |  |  |
Derivative, original notional amount |  | 1,875.0 |  |  |  |  |  | $ 1,900.0 |  |
Foreign currency contracts | Cash flow hedging |  |  |  |  |  |  |  |  |  |
Derivative, original notional amount |  | 4,000.0 |  |  |  | $ 4,000.0 |  |  |  |
Interest rate swaps | Cash flow hedging |  |  |  |  |  |  |  |  |  |
Derivative, original notional amount |  | $ 850.0 |  |  |  |  | $ 850.0 |  |  |
ASU No. 2014-09 |  |  |  |  |  |  |  |  |  |
Effect of change in accounting principle on retained earnings |  |  |  |  |  |  |  |  |  | $ 3.0
ASU No. 2016-02 |  |  |  |  |  |  |  |  |  |
Operating lease ROU assets |  |  |  |  |  |  |  |  | $ 806.0 |
Operating lease liabilities |  |  |  |  |  |  |  |  | $ 838.0 |
ASU No. 2016-13 | Subsequent event |  |  |  |  |  |  |  |  |  |
Effect of change in accounting principle on retained earnings |  |  |  |  | $ 8.0 |  |  |  |  |
Minimum | Interest rate swaps | Cash flow hedging |  |  |  |  |  |  |  |  |  |
Derivative, term of contract | 10 years |  |  |  |  |  |  |  |  |
Maximum | Interest rate swaps | Cash flow hedging |  |  |  |  |  |  |  |  |  |
Derivative, term of contract | 30 years |  |  |  |  |  |  |  |  |

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