Pension, Other Postretirement Benefits and Savings Plans - Changes in Fair Value of Plan Assets (Details) - Non-U.S. - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan, Changes in Fair Value of Pension Plan Assets Classified as Level 3
Beginning balance	$ 2,464
Ending balance	2,740	$ 2,464
Insurance Contracts
Defined Benefit Plan, Changes in Fair Value of Pension Plan Assets Classified as Level 3
Beginning balance	19
Ending balance	22	19
Equity Securities - Commingled Funds
Defined Benefit Plan, Changes in Fair Value of Pension Plan Assets Classified as Level 3
Beginning balance	14
Ending balance	36	14
Other
Defined Benefit Plan, Changes in Fair Value of Pension Plan Assets Classified as Level 3
Beginning balance	6
Ending balance	(4)	6
Significant Other Unobservable Inputs (Level 3)
Defined Benefit Plan, Changes in Fair Value of Pension Plan Assets Classified as Level 3
Beginning balance	21
Ending balance	23	21
Significant Other Unobservable Inputs (Level 3) \| Insurance Contracts
Defined Benefit Plan, Changes in Fair Value of Pension Plan Assets Classified as Level 3
Beginning balance	19
Ending balance	22	19
Significant Other Unobservable Inputs (Level 3) \| Equity Securities - Commingled Funds
Defined Benefit Plan, Changes in Fair Value of Pension Plan Assets Classified as Level 3
Beginning balance	0
Ending balance	0	0
Significant Other Unobservable Inputs (Level 3) \| Other
Defined Benefit Plan, Changes in Fair Value of Pension Plan Assets Classified as Level 3
Beginning balance	2
Ending balance	1	2
Pension Plan
Defined Benefit Plan, Changes in Fair Value of Pension Plan Assets Classified as Level 3
Beginning balance	2,464	2,806
Foreign currency translation	80	(160)
Ending balance	2,740	2,464
Pension Plan \| Significant Other Unobservable Inputs (Level 3) \| Insurance Contracts
Defined Benefit Plan, Changes in Fair Value of Pension Plan Assets Classified as Level 3
Beginning balance	19	18
Realized gains (losses)		0
Unrealized (losses) gains relating to instruments still held at the reporting date	1
Purchases, sales, issuances and settlements (net)	2	2
Foreign currency translation		(1)
Ending balance	22	19
Pension Plan \| Significant Other Unobservable Inputs (Level 3) \| Real Estate
Defined Benefit Plan, Changes in Fair Value of Pension Plan Assets Classified as Level 3
Beginning balance	0	4
Realized gains (losses)		0
Purchases, sales, issuances and settlements (net)		(4)
Foreign currency translation		0
Ending balance		0
Pension Plan \| Significant Other Unobservable Inputs (Level 3) \| Equity Securities - Commingled Funds
Defined Benefit Plan, Changes in Fair Value of Pension Plan Assets Classified as Level 3
Beginning balance	0	131
Realized gains (losses)		(1)
Purchases, sales, issuances and settlements (net)		(128)
Foreign currency translation		(2)
Ending balance		0
Pension Plan \| Significant Other Unobservable Inputs (Level 3) \| Other
Defined Benefit Plan, Changes in Fair Value of Pension Plan Assets Classified as Level 3
Beginning balance	2	3
Realized gains (losses)		0
Unrealized (losses) gains relating to instruments still held at the reporting date	0
Purchases, sales, issuances and settlements (net)	(1)	(1)
Foreign currency translation		0
Ending balance	$ 1	$ 2

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets sold.

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- Definition

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets still held.

+ References

+ Details

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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 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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- Definition

Amount, measured using unobservable input, of increase (decrease) in plan asset of defined benefit plan from purchase, sale and settlement of trade associated with underlying investment.

+ References

+ Details

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