Lease Arrangements (Details) $ in Millions	12 Months Ended
Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term	8 years 2 months 12 days
Lease, Cost [Abstract]
Change to ROU asset, liability due to shortened lease term	$ 9
Operating Lease, Impairment Loss	$ 6
Weighted average discount rate	4.30%
Cash paid for amounts included in the measurement of operating lease liabilities	$ 29
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term of contract	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term of contract	12 years
Lessee, operating lease, renewal term	10 years

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

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Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of loss from impairment of right-of-use asset from operating lease.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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