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Retired employees entitled to receive postretirement benefits.

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Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position.

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

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Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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Pension, Health Care and Other Postretirement Benefits - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) pension_plan employee	Dec. 31, 2021 USD ($) employee	Dec. 31, 2020 USD ($) employee	Dec. 31, 2019 USD ($)
Minimum \| Equity Securities
Expected defined benefit payments
Target allocation percentage of plan assets in equity securities	35.00%
Minimum \| Fixed Income Securities
Expected defined benefit payments
Target allocation percentage of plan assets in equity securities	35.00%
Minimum \| Other Securities
Expected defined benefit payments
Target allocation percentage of plan assets in equity securities	0.00%
Maximum \| Equity Securities
Expected defined benefit payments
Target allocation percentage of plan assets in equity securities	65.00%
Maximum \| Fixed Income Securities
Expected defined benefit payments
Target allocation percentage of plan assets in equity securities	55.00%
Maximum \| Other Securities
Expected defined benefit payments
Target allocation percentage of plan assets in equity securities	5.00%
Postretirement Health Coverage
Health care plans
Number of active employees entitled to receive benefits under health care plans \| employee	30,009	29,016	27,782
Cost of benefits includes claims incurred and claims incurred but not reported under health care plans	$ 347.4	$ 336.0	$ 298.8
Defined Benefit Pension
Health care plans
Fair value of plan assets	232.1	341.9	356.4
Expected defined benefit payments
Expected cash payments, 2023	15.4
Expected cash payments, 2024	16.4
Expected cash payments, 2025	17.4
Expected cash payments, 2026	18.5
Expected cash payments, 2027	19.4
Expected cash payments, 2028-2032	114.9
Amortization of actuarial losses	(1.1)
Amortization of prior service cost (credit)	1.1
Defined Benefit Pension \| Domestic Defined Benefit Pension Plan
Health care plans
Contributions by company	88.9	85.3	77.0
Projected benefit obligation	91.7	120.8	118.6	$ 103.0
Fair value of plan assets	119.4	155.2	144.3	125.9
Excess (deficient) plan assets over projected benefit obligations	27.7	34.4	25.7
Accumulated benefit obligation	$ 90.3	117.0	114.2
Defined Benefit Pension \| Domestic Defined Benefit Pension Plan \| Minimum
Health care plans
Contributions by company (percentage)	2.00%
Defined Benefit Pension \| Domestic Defined Benefit Pension Plan \| Maximum
Health care plans
Contributions by company (percentage)	7.00%
Defined Benefit Pension \| Foreign Defined Benefit Pension Plans
Health care plans
Contributions by company	$ 19.4	17.9	22.5
Projected benefit obligation	230.4	362.7	401.1	360.7
Fair value of plan assets	223.6	328.4	318.2	288.1
Excess (deficient) plan assets over projected benefit obligations	$ (6.8)	(34.3)	(82.9)
Number of defined benefit plans \| pension_plan	34
Accumulated benefit obligation	$ 209.3	334.8	370.2
Expected defined benefit payments
Estimated future employer contributions	5.5
Defined Benefit Pension \| Overfunded Plan \| Domestic Defined Benefit Pension Plan
Health care plans
Projected benefit obligation	91.7
Fair value of plan assets	119.4
Excess (deficient) plan assets over projected benefit obligations	27.7
Defined Benefit Pension \| Unfunded Plan \| Foreign Defined Benefit Pension Plans
Health care plans
Projected benefit obligation	78.5
Fair value of plan assets	20.0
Excess (deficient) plan assets over projected benefit obligations	$ (58.5)
Number of foreign defined benefit pension plans unfunded or underfunded \| pension_plan	27
Accumulated benefit obligation	$ 65.8
Postretirement Benefits Other than Pensions
Health care plans
Projected benefit obligation	153.8	$ 276.4	$ 291.6	$ 280.5
Expected defined benefit payments
Expected cash payments, 2023	14.5
Expected cash payments, 2024	15.0
Expected cash payments, 2025	15.5
Expected cash payments, 2026	15.4
Expected cash payments, 2027	14.9
Expected cash payments, 2028-2032	59.3
Amortization of actuarial losses	0.1
Amortization of prior service cost (credit)	$ (24.0)
Number of retired employees entitled to receive postretirement benefits \| employee	3,409	3,410	3,465
Defined benefit plan ultimate health care cost trend rate and prescription drug cost increase rate (percentage)	4.50%