Pensions Benefit Plans and Other Postretirement Benefits - Changes in Fair Value of Pension Plan Assets (Details) - Pension Benefit Plans - Funded Plan - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
U.S.
Changes in fair value of pension plan assets
Fair value at beginning of year	$ 1,215	$ 1,094
Actual gain (loss) on plan assets	161	235
Benefit payments	(86)	(87)
Employer contributions	58	8
Settlements	(24)	(35)
Net change in fair value of assets	109	121
Fair value at end of year	1,324	1,215
Non-U.S.
Changes in fair value of pension plan assets
Fair value at beginning of year	947	843
Actual gain (loss) on plan assets	99	110
Benefit payments	(51)	(37)
Employer contributions	45	25
Participant contributions	1	1
Settlements	(63)	(44)
Acquisitions (Divestitures)	(71)	30
Foreign currency translation	23	26
Other	(1)	(7)
Net change in fair value of assets	(18)	104
Fair value at end of year	$ 929	$ 947

Amount of increase or decrease in plan assets of defined benefit plan from business combination.

No definition available.

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- Definition

This element represents the change in fair value of the pension plan assets as a result of other items not defined in the taxonomy.

+ References

No definition available.

+ Details

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- Definition

Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses.

+ References

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- Definition

Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.

+ References

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- Definition

Amount of contributions received by defined benefit plan from participant which increase benefit obligation.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

+ References

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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 increase (decrease) in plan assets of defined benefit plan.

+ References

No definition available.

+ Details

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan.

+ References

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- Definition

Amount of payment, which decreases plan assets of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract.

+ References

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