Pensions and Postretirement Benefits Other than Pensions (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Company contributions	$ 50.0	$ 18.6
Distribution of Industrial Businesses	(1,334.3)
Pension Costs [Member]
Defined Benefit Plan, Benefit Obligation, Divestiture	488.7
Defined Benefit Plan, Plan Assets, Divestiture	351.3
Actuarial gain (loss)	(11.3)	(13.4)
Pension Plan, Defined Benefit [Member]
Expected future employer contributions in 2017	91.0
Postretirement Benefit Costs [Member]
Defined Benefit Plan, Benefit Obligation, Divestiture	29.8
Actuarial gain (loss)	1.1	$ 1.6
Reverse Morris Trust Transaction [Member]
Company contributions	24.4
Accumulated Defined Benefit Plans Adjustment [Member]
Distribution of Industrial Businesses	69.1
Accumulated Defined Benefit Plans Adjustment [Member] \| Pension Costs [Member]
Distribution of Industrial Businesses	114.2
Accumulated Defined Benefit Plans Adjustment [Member] \| Postretirement Benefit Costs [Member]
Distribution of Industrial Businesses	$ 4.1

Distribution of Industrial Businesses

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Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.

+ References

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Amount of decrease in benefit obligation of defined benefit plan from disposal or classification as held-for-sale.

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Amount of decrease in plan assets of defined benefit plan from disposal or classification as held-for-sale.

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Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year.

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Amount of cash outflow for pension benefit. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. Excludes other postretirement benefit.

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