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No definition available.

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- Definition

Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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- Definition

Amount of contributions received and expected to be received by defined benefit plan from employer in current fiscal year.

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- Definition

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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- Definition

Amount of net periodic benefit cost (credit) for defined benefit plan.

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- Definition

Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount, before tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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- Definition

Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current.

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- Definition

Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans.

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Pension and Other Postretirement Benefits - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
	Jan. 01, 2020	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Retirement plans, liability	$ 1,920
Retirement plans, current liability	60
Retirement plans, benefit obligation	4,255
Retirement plans, plan assets	2,335
Establishment of retirement plans, AOCI	$ 1,752
Net periodic benefit cost		$ 26
Service cost		6
Multiemployer contribution expense			$ 28
Forecast
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost				$ 100
Service cost				$ 25
Pension benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost		21	1
Service cost		5	0
Multiemployer contribution expense		0	16
Expected employer contributions, 2020		255
Other postretirement benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost		6	0
Service cost		1	0
Multiemployer contribution expense		0	$ 5
Expected employer contributions, 2020		$ 55